City of Lafayette Staff Report

City of Lafayette Staff Report For: By: Planning Commission Megan Canales, Planning Technician Meeting Date: January 20, 2015 Subject: Deadline: HDP15-14 RSR Development Company (Owners) R-10 Zoning: Request for: 1) a Phase I Hillside Development Permit for siting and massing determination 2) Design review approval, and 3) a Grading Permit to construct a new 4,226 3,413 sq. ft. two-story single-family residence with a maximum height of 33-4, requiring grading of 750 CY (385 CY cut / 365 CY fill) 388 CY (194 CY cut, 194 CY fill) on an undeveloped parcel within the Hillside Overlay District, located at 4 Dollis Park Road, APN 244-220-053. February 3, 2014 (without PSA extension) EXECUTIVE SUMMARY This staff report provides an overview and analysis of the project s siting and massing, environmental analysis, and compliance with the General Plan and zoning regulations associated with the construction of a new residence in the Hillside Overlay District. Staff recommends that the Planning Commission review the proposed development, conduct a public hearing, and continue the matter to a future date certain to allow the applicant to make modifications. SUMMARY OF REQUEST Requested Approvals: 1. Hillside Development Permit (HDP): Phase I (Siting and massing) 2. Design Review Permit for the structures to exceed 17 ft. in height 3. Grading Permit for grading over 50 cubic yards Review Process: The Planning Commission will take final action on this application for siting and massing of the proposed residence. Once the house site and mass are approved by the Planning Commission, the applicant can submit full design plans for a Phase II HDP for review by the Design Review Commission. Scope of work: The Phase I application includes one possible house site location. The applicant proposes to construct a new residence that is 3,413 sq. ft. (including garage) with a maximum height of 33-4. Page 1 of 9

Planning Commission HDP15-14 Reddy Staff Report January 20, 2015 Trigger Yes No Trigger Yes No Within a protected ridgeline setback? Grading > 50 cubic yards? Within 100-ft. of a ridgeline setback? DR required as condition of approval? In the Hillside Overlay District? In a commercial or MFR zone? Over 17-ft. in height to ridge? Variance requested? SFR Development > 6,000 sq.ft.? Tree Permit Requested? Creek Setback required? Redevelopment Project Area LOCATION & SITE CONDITIONS Looking north Location: General Plan: Zoning: Topography: Lot Size: Creek / Flood Zone: Looking west Dollis Park Road, off of North Thompson Road (location map attached) Medium Density Single-Family Residential (Up to 6 dwelling units per acre) Single-Family Residential District- 10 (R-10) Steady upslope toward the north 12,155-square feet (0.28 acres) None; Zone X SURROUNDING LAND USES Immediately Adjacent Zoning North Single-Family Residence (One-Story) R-10 South Dollis Park Road R-10 East Single-Family Residence (Two-Story) R-10 West Single-Family Residence (Two-Story) R-10 PROJECT HISTORY DR39-92 Rockey (October 27, 1992): The Zoning Administrator approved an application for a two-story addition to an existing two-story single-family residence. This residence was demolished. Page 2 of 9

Planning Commission HDP15-14 Reddy Staff Report January 20, 2015 Over-the-counter building permit approval (January 8, 2002): The applicant received building permit approval for a new single-family residence as the construction did not trigger design review at that time. The project was not constructed. The Hillside Regulations came into effect on August 8, 2002 and the new proposal is subject to a Hillside Development Permit. SS10-04 DeCarvalho (March 9, 2004): Commission discussed the following issues: Lot coverage. Concern for building from setback to setback. May be built out for the lot size. May want to consider instead a smaller, more compact two-story element. Grade manipulation. May be shoehorning the proposal into the site. Try to make the house fit the topography of the lot as much as possible. Consider a sloping foundation wall. Apparent bulk and mass through continuous roof plane. Provide demonstration. Volume of proposal in proximity to adjacent residences. Colors and materials should be varied. Suggested not all stucco or use of more than one stucco color to break up the bulk and mass. Consider a more consistent design, either more modern or Maybeck style with more material variation. Landscape mitigation would be necessary. HDP46-04 DeCarvalho (October 2004): Commission discussed the following issues: Outdoor living space is inadequate Residence overdevelops the site, with the residence built out from setback to setback Provide softer more natural materials more in context with the neighborhood Provide a landscape plan to address the entire site Submit revised plans with a more appropriate building form and mass Submit an updated soils report Provide neighborhood context The applicant withdrew the application, hired a new architect, and submitted a study session. SS12-05 DeCarvalho (August 2005): Commission discussed the following issues: Terrace the wall to be more creative in the rear yard. Consider eliminating the railing at the entry and making it more landscape oriented Suggested that the siting of the house is appropriate Consider curving the staircase The garage appearing very "blockish" and additional detail requested on the railings. Show existing and proposed grades. At a preliminary review, the house appears tall. Submit a full landscape and drainage plan to adequately address site constraints. Runoff should dissipate onsite instead of a direct connection. Submit shielded light fixtures. The carriage lights are not appropriate Provide a consistent architectural design and style for all elevations and details Work with neighboring properties to address their concerns HDP44-06 DeCarvalho (June 10, 2008): The Design Review Commission approved an application for a 1) Hillside Development Permit, 2) Design Review Permit, 3) Grading Permit, and 4) Variance Permit to construct a new 4,200 sq. ft. two-story single family residence with a ridge building height of 38 ft. at 4 Dollis Park Rd. Page 3 of 9

Planning Commission HDP15-14 Reddy Staff Report January 20, 2015 The project was not constructed. At the time this project was approved, there was not a two phase hillside process for undeveloped lots in the Hillside Overlay District and the new proposal is subject to the new process. ENVIRONMENTAL REVIEW Staff evaluated the project in accordance with the California Environmental Quality Act ( CEQA ) and determined the project is categorically exempt under Section 15303, because the project entails the construction of a single-family residence in a residential zone that is already served by public services and is consistent with the General Plan. PUBLIC NOTICE & COMMENTS Property owners within 300 of the subject property were mailed a notice of public hearing, and the immediate area was posted at least ten days prior to the initial scheduled public hearing. At the time this staff report was prepared, the City has received no public comments. REFERRAL AGENCIES COMMENTS The project plans were referred to the Central Contra Costa Sanitary District ( CCCSD ); City Engineer; City Landscape Consultant; Contra Costa County Building Inspection Department ( CCCBID ); and Contra Costa County Fire Protection District ( CCCFPD ). At the time the staff report was prepared, the City has received agency comments, attached, from the CCCSD and CCCBID where neither agency had project specific comments. ANALYSIS & COMMENTS Consistency with the General Plan The General Plan designation for the subject property is Medium Density Single-Family Residential, which allows up to 6-dwelling units per acre. The applicant proposes to construct one unit on a 0.28- acre parcel which complies with this density. While the proposed residence complies with the density limits, staff does not believe the proposed development complies with the following General Plan goals, policies, and programs: Policy LU-1.1 Scale: Development shall be compatible with the scale and pattern of existing neighborhoods. Refer to the siting and massing section of this staff report. Program LU-3.1.2. Apply the City s Residential Design Guidelines to ensure quality design. Refer to the consistency with Residential Design Guidelines, siting, and massing section of this staff report. Consistency with Residential Design Guidelines The siting and massing does not comply with the Residential Guidelines, specifically the following guidelines: Houses with small footprints are encouraged where a site is restricted by existing natural features (Guideline IB2d) The overall scale and square footage of the buildings should relate to existing neighborhood visual scale and square footage (Guideline IIB2d) Consistency with Zoning District Regulations The subject property is located within the Single-Family Residential District - 10 (R-10). The following Page 4 of 9

Planning Commission HDP15-14 Reddy Staff Report January 20, 2015 table shows consistency of the proposed development with the R-10 regulations: Development Standard Standard Existing Proposed Lot Area (min.) 10,000 SF 12,155 SF 12,155 SF (no change) Height (max.) 35-0 - 33-4 Stories (max.) 2 ½ Stories - 2 story Front Yard (min.) 20-0 1-20 -0 Side Yard (min.) 10-0 - ~10 and ~10 Aggregate Side Yard (min.) 20-0 - ~20 Rear Yard (min.) 15-0 - ~40 Parking (min.) 2-2 Siting The applicant has submitted a site constraints analysis and proposed one potential building site to evaluate with the constraints analysis. The constraints analysis identifies the following constraints/layers: Setbacks (Sheet A2.1) Vegetation (Sheet A2.2) Slope (Sheet A2.3) Under 30%, 30-50%, and over 50% Composite Overlay (Sheet A2.4) Composite Overlay with Proposed Footprint (Sheet A2.5) Staff finds that the siting of a proposed residence is limited due to the setbacks, configuration of the site, and topography as seen on Sheet A2.5, below. The lot has a steady increase in grade toward the north side (rear) of the property. The elevation changes ~35 from front to back (south to north) of the property. A majority of the buildable area has a 30-50-percent slope as seen on Sheet A2.4. The topography lends itself well to a residence that steps into the hill. Currently, the proposed residence is not greatly responsive to the grade of the hill. Staff recommends that the applicant use the general shape and layout of the proposed residence, but step it with the hillside to a greater degree. One way this can be done is shifting the upper-story up the hill 1 For application HDP46-04, The Design Review Commission and Planning Department determined that the front setback was to be taken from the edge of pavement where the Dollis Park Road is located, not the edge of the property. See attached page from the staff report on October 12, 2004. Page 5 of 9

Planning Commission HDP15-14 Reddy Staff Report January 20, 2015 slightly. This would reduce the height of the proposed residence at any given section, and create larger upper-story step backs when viewed from Dollis Park Road, thus reducing the scale of the proposed residence. The relationship of the project to the hillside can be seen on Sheet A3, Section A-A as shown below. Staff also has concerns that currently, there is no outdoor space being proposed. While there does not need to be full design drawings of the outdoor space in Phase I, there should be some consideration of where the outdoor space will be located on-site. Staff recommends that the applicant indicate where on-site outdoor space is planned. Massing The proposal complies with zoning district standards at ~33 in height. The proposed development will be larger than the average house size in the neighborhood, however, the lot size is slightly larger than average for the neighborhood as well. Most of the residences off of Dollis Park Road do have a tall presence on the street because the street is at a lower elevation than most of the properties along it. The subject property included, at ~6-25 above street level where the new residence is proposed. While the houses along Dollis Park Road have a two-story scale in relation to the street and the subject proposal is for a two-story residence, staff finds that the current proposal has a three-story presence along the street. Staff recognizes that the applicant has reduced the mass and height of the residence since the initial plans submitted and appreciates the applicant s effort to reduce the apparent scale of the residence. However, staff is still concerned with the overall three-story scale that is proposed. The two elevations that read the tallest from off-site are the south elevation (which has a three-story presence facing the street) and the west elevation. The west elevation will be 45 away from the residence to the south as the proposed residence spans nearly the entire parcel from side setback to side setback (east to west). South Elevation (facing Dollis Park Road) Page 6 of 9

Planning Commission HDP15-14 Reddy Staff Report January 20, 2015 West Elevation (facing a neighbor 45 away) Staff finds that there are opportunities to reduce the mass of the residence without compromising the design intent or program of the applicant. Some examples to reduce the overall scale of the proposed residence are to step the residence with the hillside (as previously suggested by Staff in this report), reduce the size of the residence, or lower the finished floor elevation. Lowering the finished floor elevation so that the proposed residence is lower in the hill, will allow the height of the proposed residence to be decreased thus reducing the scale. Grading The applicant is proposing 388 cubic yards of grading (194 CY cut, 194 CY fill). The applicant submitted a geotechnical report prepared by Cundey Geotechnical Associates in 2005 and updated by Peters & Ross in 2014. The reports analyze the proposed project and make a number of recommendations including foundations and drainage. The report from 2005 concludes that the site is suitable for the planned residence, and this conclusion is echoed in the report from 2014. The geotechnical reports are attached to this report. REQUIRED FINDINGS The Planning Commission must make all of the required findings in order to approve the subject application. 6-2071 Findings required for approval of a hillside development permit on an existing lot of record. The hearing authority may approve an application for a hillside development permit on an existing lot of record in the hillside overlay district only after making the following findings: (a) The development is consistent with the applicable goals and policies of the general plan and is in conformance with applicable zoning regulations; (b) The development will preserve open space and physical features, including rock outcroppings and other prominent geological features, streams, streambeds, ponds, drainage swales, native vegetation, native riparian vegetation, animal habitats and other natural features; (c) Structures in the hillside overlay district will, to the extent feasible, be located away from prominent locations such as ridgelines, hilltops, knolls and open slopes; (d) The development, including site design and the location and massing of all structures and improvements will, to the extent feasible: (1) Minimize the loss of privacy to surrounding residents and not unduly impact, restrict or block significant views; (2) Not have a significant visual impact when viewed from lower elevations from public places, using the viewing evaluation map as a guide to establish locations from which views are considered; and (3) Not interfere with a ridgeline trail corridor or compromise the open space or scenic character of the corridor. Page 7 of 9

Planning Commission HDP15-14 Reddy Staff Report January 20, 2015 (e) Within 100 feet of a restricted ridgeline area, or when a exception to a ridgeline setback has been granted, the development will result in each structure being substantially concealed by terrain or vegetation when viewed from lower elevations from public places, using the viewing evaluation map as a guide to establish locations from which views are considered; (f) Development grading will be minimized to limit scarring and cutting of hillsides especially for long roads or driveways, preserve existing geologic features, topographic conditions and existing vegetation, reduce short and long-term erosion, slides and flooding, and abate visual impacts; (g) The development provides adequate emergency vehicle access, including turn-around space, to the building site and surrounding on-site undeveloped or isolated areas; (h) Each structure and proposed landscaping complies with the city s residential design guidelines; (i) The new or replacement vegetation for the development is native to the surrounding area in areas abutting open space and natural areas, such as oak woodland, chaparral, grassland and riparian areas, and conforms to the policies of Section 6-2051; and (j) The development will not create a nuisance, hazard or enforcement problem within the neighborhood or the city, nor require the city to provide an unusual or disproportionate level of public services. 6-275 Specific findings required for design review. 1. Every provision of this chapter is complied with; 2. The approval of the plan is in the best interest of the public health, safety and general welfare; 3. General site considerations, including site layout, open space and topography, orientation and location of buildings, vehicular access, circulation and parking, setbacks, height, walls, fences, public safety and similar elements have been designed to provide a desirable environment for the development; 4. General architectural considerations, including the character, scale and quality of the design, the architectural relationship with the site and other buildings, building materials, colors, screening of exterior appurtenances, exterior lighting and signing and similar elements have been incorporated in order to ensure the compatibility of this development with its design concept and the character of adjacent buildings; and 5. General landscape considerations, including the location, type, size, color, texture and coverage of plant materials, provisions for irrigation, maintenance and protection of landscaped areas and similar elements have been considered to ensure visual relief, to complement buildings and structures and to provide an attractive environment for the enjoyment of the public. 6-1905 General findings for structures over 17 in height. 1. The structure substantially complies with the city's residential design guidelines; 2. The structure is so designed that it will appear compatible with the scale and style of the existing neighborhood and will not significantly detract from the established character of the neighborhood; 3. The structure is so designed that it does not appear too tall or massive in relation to surrounding structures or topography when viewed from off-site; and 4. The structure is so designed that it does not unreasonably reduce the privacy or views of adjacent properties. 3-701 Findings required for approval of grading exceeding 50 cubic yards 1. The grading will not endanger the stability of the site or adjacent property or pose a significant ground movement hazard to an adjacent property. The decision making authority may require the Page 8 of 9

Planning Commission HDP15-14 Reddy Staff Report January 20, 2015 project geotechnical engineer to certify the suitability of the project supported by appropriate technical studies, including subsurface investigation; 2. The grading will not significantly increase erosion or flooding affecting the site or other property and will not cause impacts to riparian habitats, stream channel capacity or water quality that cannot be substantially mitigated; 3. The grading, when completed, will result in a building site that is visually compatible with the surrounding land; 4. The grading is sensitive to the existing landforms, topography and natural features on the site; and 5. The design of the project preserves existing trees on the site and trees on adjoining property to the extent possible. CONCLUSION Staff finds that the project is generally well designed; however, the size, scale, height, and mass are out of scale with the neighborhood. As articulated above, staff recommends the following revisions: 1. Revise the project in response to the Commission 2. Reduce the scale of the proposed residence through the following: a. Stepping the residence with the hillside b. Lowering the finished floor elevation c. Reducing the size STAFF RECOMMENDATION Consider the matter, take public testimony, provide direction to the applicant and continue the matter to a future date certain to allow the applicant to make modifications. ATTACHMENTS 1. Aerial Maps & Photos 2. Applicant s response to findings 3. Setback determination- 2004 4. Approved plans from HDP44-06 5. Geotechnical Reports a. Updated by Peter & Ross July 1, 2014 b. Prepared by Cundey Geotechnical Associates September 8, 2005 6. Public Agency Referral Comments a. CCCBID b. CCCSD 7. Project Plans, received November 24, 2014 Page 9 of 9

4 Dollis Park Road APN 244-220-053 CityGIS 300 ft

4 Dollis Park Road APN 244-220-053 CityGIS 200 ft

4 Dollis Park Road APN 244-220-053 CityGIS 100 ft

4 Dollis Park Road APN 244-220-053 CityGIS 40 ft

RSR DEVELOPMENT COMPANY Builders / Designers Established 1988 HPD15-14 RESPONSE TO FINDINGS Project Description General The proposal is for a new 3,116 SF residence the design and layout of which comply with all city requirements and guidelines The previous SFR built in 1930 s was removed leaving behind a barren lot completely devoid of any esthetics or landscaping and is a blight upon the neighborhood in every aspect. The new structure will comply with current building, energy and green codes to provide extensive upgrades, energy conservation, structural stability and overall neighborhood appeal and significantly enhance surrounding property values. HILLSIDE DEVELOPMENT: A. Explain how the development is consistent with the applicable goals and policies of the General Plan and is in conformance with applicable zoning regulations. The development meets the spirit and letter of the goals and policies of the general plan. B. Explain how the development will preserve open space and physical features, including rock outcroppings and other prominent geological features, streams, streambeds, ponds, drainage swales, native vegetation, native riparian vegetation, animal habitats and other natural features. The development will preserve open space and physical features. It leaves the lot wide open for the neighbors enjoyment of views. There are no streams, creeks or natural habitat that will be obscured. C. Explain how structures in the Hillside Overlay District will, to the extent feasible, be located away from prominent locations such as ridgelines, hilltops, knolls and open slopes; The constraints provide no choice for the home site. The lot/hill is not part of a ridgeline or hilltop. D. Explain how the development, including site design and the location and massing of all structures and improvements will, to the extent feasible: 1. Minimize the loss of privacy to surrounding residents and not unduly impact, restrict or block significant views; The home site and development proposal is perfectly situated to have little if any impact on privacy or views for surrounding residents. 2. Not have a significant visual impact when viewed from lower elevations from public places, using the viewing evaluation map as a guide to establish locations from which views are considered; and

The proposal will not create any silhouettes from lower elevations, as it is back-dropped by the rest of the hill above, and by much larger, higher structures and existing vegetation along the uphill. 3. Not interfere with a ridgeline trail corridor or compromise the open space or scenic character of the corridor. n/a E. Within 100 feet of a restricted ridgeline area, or when a exception to a ridgeline setback has been granted, explain how the development will result in each structure being substantially concealed by terrain or vegetation when viewed from lower elevations from public places, using the Viewing Evaluation Map as a guide to establish locations from which views are considered. n/a F. Explain how development grading will be minimized to limit scarring and cutting of hillsides especially for long roads or driveways, preserve existing geologic features, topographic conditions and existing vegetation, reduce short and long term erosion, slides and flooding, and abate visual impacts. Because the massing is driven by the contours, it minimizes cut and fill. The massing will harmonize with the shape of the hill. There will be low water/native plantings proposed, and therefore minimal irrigation will be needed in the area. G. Explain how the development provides adequate emergency vehicle access, including turn around space, to the building site and surrounding on site undeveloped or isolated areas. No special emergency access is required. H. Explain how each structure and proposed landscaping complies with the City s Residential Design Guidelines. The massing of the house has been carefully designed with the intent of Lafayette s Residential Design Guidelines. It responds to the contours of the property and provides proportions that are so important to Lafayette s traditional hillside building stock. Landscaping will be used to enhance privacy and views of neighbors. I. Explain how the new or replacement vegetation for the development is native to the surrounding area in areas abutting open space and natural areas, such as oak woodland, chaparral, grassland and riparian areas, and conforms to the following policies, pursuant to Section 6 2051: New or replacement vegetation in an area abutting open space and natural areas, such as oak woodland, chaparral, grassland and riparian areas, excluding planting for erosion control or land stabilization, shall be native to the surrounding area. The goal of the planting should be a seamless blending with the natural vegetation. The reviewing authority may grant an exception to this requirement for a small garden area near the home provided it is not visible from public places and contains no non native trees or shrubs over six feet in height, or large green expanses. There will be low water/native plantings proposed per section 6-2051, and therefore minimal irrigation will be needed in the area. J. Explain how the development will not create a nuisance, hazard or enforcement problem within the neighborhood or the city, nor require the city to provide an unusual or disproportionate level of public services. No special nuisance is foreseeable and extensive engineering will insure stability and safety of the neighborhood.

DESIGN REVIEW 6 275 Specific Findings Required for Design Review. 1. Every provision of this chapter is complied with; 2. The approval of the plan is in the best interest of the public health, safety and general welfare; The proposed new residence is in keeping with all current City design requirements, standards, and regulations. The previous SFR built in 1930 s was removed leaving behind a barren lot completely devoid of any esthetics or landscaping and is a blight upon the neighborhood in every aspect. The new structure will comply with current building, energy and green codes to provide extensive upgrades to energy conservation, structural stability and overall neighborhood appeal and significantly enhance surrounding property values. 3. General site considerations, including site layout, open space and topography, orientation and location of buildings, vehicular access, circulation and parking, setbacks, height, walls, fences, public safety and similar elements have been designed to provide a desirable environment for the development; The proposed new residence will be sited within all required Setbacks, following the natural contours of the property and slightly forward of where the previous structure was located, leaving existing rear planting area and the hillside virtually undisturbed. Parking circulation is a huge problem in the area at present, multiple additional off street parking spaces are proposed; over and above what is required and where existing street parking is currently non-existent. 4. General architectural considerations, including the character, scale and quality of the design, the architectural relationship with the site and other buildings, building materials, colors, screening of exterior appurtenances, exterior lighting and signing and similar elements have been incorporated in order to ensure the compatibility of this development with its design concept and the character of adjacent buildings; and The proposed new residence will greatly enhance the existing neighborhood and bring it to keeping with the character, scale and quality of existing adjacent Homes, actually becoming a prominent and unique design compliment. 5. General landscape considerations, including the location, type, size, color, texture and coverage of plant materials, provisions for irrigation, maintenance and protection of landscaped areas and similar elements have been considered to ensure visual relief, to complement buildings and structures and to provide an attractive environment for the enjoyment of the public. The proposed new residence will be planted with low-water, native plantings to bring the site to current neighborhood standards and conditions as opposed to the current barren lot completely devoid of any esthetics or landscaping.

6 1905 Findings for Structures Over 17 ft. in Height 1. The structure substantially complies with the city's residential design guidelines; 2. The structure is so designed that it will appear compatible with the scale and style of the existing neighborhood and will not significantly detract from the established character of the neighborhood; The proposed new residence will greatly enhance the existing neighborhood and bring it to keeping with the character, scale and quality of existing adjacent Homes, actually becoming a prominent and unique design compliment. 3. The structure is so designed that it does not appear too tall or massive in relation to surrounding structures or topography when viewed from off site; 4. The structure is so designed that it does not unreasonably reduce the privacy or views of adjacent properties. The proposed new residence will be two stories (massing contoured naturally) within the maximum height of 35 feet.. It will be set with the backdrop of the hillside and foliage as viewed from the street. Any views from adjacent properties are minimal due to the steep hillside to the left and existing trees on the right. GRADING 1. The grading will not endanger the stability of the site or adjacent property or pose a significant ground movement hazard to an adjacent property. See Soils Report attached ; extensive engineering will insure stability and safety of the neighborhood 2. The grading will not significantly increase erosion or flooding affecting the site or other property and will not cause impacts to riparian habitats, stream channel capacity, or water quality that cannot be substantially mitigated. There are no riparian features to be impacted. 3. The grading, when completed, will result in a building site that is visually compatible with the surrounding land. 4. The grading is sensitive to the existing landforms, topography, and natural features on the site. Because the massing is driven by the contours, it minimizes cut and fill. The massing will harmonize with the shape of the hill. 5. The design of the project preserves existing trees on the site and trees on adjoining property to the extent possible. 6. Arborist recommendations for retained trees, if any, are incorporated into the grading plan. No trees are proposed to be removed for the project, the design of the project protects the one existing tree which shall be additionally protected during construction.

Design Review Commission October 12, 2004 Staff Report HDP46-04 DeCarvalho The applicant s soil engineer, Buller Group, prepared a geotechnical report dated February 7, 2001 addressing the construction of a new single-family residence. The report concluded that that the site is suitable for the proposed development, subject to the recommendations stated within the report. Refer to the attachments. Analysis and Comments Architectural design: In response to the Design Review Commission, the applicant has incorporated stone into the architectural design to break up the materials on the front elevation. The upper deck about the garage has opened up with the use of open railing to reduce the bulk of frontage. The applicant has also varied the use of the half-arch windows to give the elevation some visual relief. Otherwise, not many changes were made to the plans from the study session. While the changes incorporated from the study session are improvements, staff suggests that the issue of developing from setback to setback is still an issue that has not been addressed. The design maintains a single-story design but may be overdeveloping the site. The proximity of the adjacent residences further impacts the proposal, particularly the residence to the west. Staff suggests that a more compact building footprint with an upper story may be more appropriate. In addition staff questions if the proposal could be further bunkered down into the hillside to minimize the bulk and mass. The overall height may also be reduced by lowering the plate heights. Setbacks: The zoning for the proposal is that of the R-10 zoning district. In the circumstance that an access easement is within the front yard, setbacks are taken from the easement line instead of the property line. The access on Dollis Park is not a straightforward. While the street is private, the physical location of the access easement is different on paper than it is onsite. Refer to the attached aerial. Dollis Park Road (244-220-063) Area actually used for the access easement (244-220-059) As such, access to parcel 244-220-062 is through 244-220-023 (4 Dollis Park). According to the title report, there is no access easement for the portion of roadway that runs through 4 Dollis Park. The surveyor is staking the area and will be providing a surveyed plan to verify this. Therefore, Planning Services Division has agreed to take the front yard setbacks from the edge of pavement. Landscaping: Page 4 of 7

Peters & Ross Geotechnical & Geoenvironmental Consultants July 1, 2014 Project No. 14155.001 Mr. Ravi Reddy RSR Development Company 3000F Danville Blvd., #268 Alamo, CA 94507 Geotechnical Update Reddy Residence, 4 Dollis Park Road, Lafayette, California Dear Mr. Reddy: In accordance with your request, Peters & Ross reviewed Cundey Geotechnical Consultants, Inc. (CGC) report dated September 8, 2005, Project No. 749.001. Mr. Reddy requested that Peters & Ross provide this update letter and assume the role of geotechnical engineer of record. It is our opinion that from a geotechnical perspective, the conclusions and recommendations provided by CGC, with the exception of the seismic design parameters, apply to the planned residence. Seismic Concerns In accordance with Section 1613 of the 2013 CBC, Peters & Ross classifies the site as a C Site Class with a latitude of 37.8394 degrees and a longitude of -122.0285 degrees. The CBC parameters presented in the following table should be used for seismic design. PERIOD (sec) 0.2 1.0 SPECTRAL RESPONSE Ss, Sl 1.500 0.600 SITE COEFFICIENT Fa, Fv (SITE CLASS C) 1.0 1.3 MAXIMUM SPECTRAL RESPONSE Sms, Sml 1.500 0.780 DESIGN SPECTRAL RESPONSE SDs, SDl 1.000 0.520 The site is not within an Alquist-Priolo Earthquake Fault Zone, and therefore the risk of fault rupture at the site is remote. No loose, clean sands were observed in the test boring. Therefore, the risk of significant foundation settlement due to liquefaction or densification during a large magnitude earthquake is low. Plan Review and Construction Observation and Testing Services Peters & Ross should review project plans, to check that the geotechnical engineering recommendations contained in this letter are properly incorporated. We should provide geotechnical observation services on an as-needed basis during construction, to check that geotechnical aspects of the work are completed in accordance with the plans. These services 114 Hopeco Road, Pleasant Hill, CA 94523 Phone: (925) 942-3629 Fax: (925) 665-1700 Email: PetersRoss@aol.com

Reddy Residence July 1, 2014 Project No. 14155.001 Page 2 of 2 should include observing foundation excavation and providing consultation to the contractor regarding any geotechnical concerns that arise during construction. Peters & Ross cannot accept responsibility for geotechnical aspects of construction that are not observed by its staff. Peters & Ross will make every reasonable effort to accommodate the contractor s work schedule during construction, so that necessary observations can be performed in a timely manner to avoid construction delays. However, since our field services are often required on several projects concurrently, we request that 48 hours advance notice be given for site visits, in order to minimize scheduling conflicts. Limitations Peters & Ross services consist of professional opinions and recommendations that are made in accordance with generally accepted geotechnical engineering principles and practices. The opinions and recommendations presented in this update letter are based on a review of the work performed by CGC, and our site meeting with Mr. Reddy. This warranty is in lieu of all other warranties either expressed or implied. If you have any questions, please call. Sincerely, Peter K. Mundy, P.E., G.E. Geotechnical Engineer 2217 114 Hopeco Road, Pleasant Hill, CA 94523 Phone: (925) 942-3629 Fax: (925) 665-1700 Email: PetersRoss@aol.com

Canales, Megan Subject: FW: Referral HDP15-14, 4 Dollis Park Road From: Thom Huggett [mailto:thom.huggett@dcd.cccounty.us] Sent: Tuesday, January 13, 2015 9:40 AM To: Canales, Megan Subject: RE: Referral HDP15-14, 4 Dollis Park Road Hi Megan, I have no comments at this time. Thom Huggett, PE, SE Principal Structural Engineer Lamorinda Building Inspection Office 3685 Mt. Diablo Blvd., Suite 120 Lafayette, CA 94549 (925) 299 0113 (925) 299 0134 fax thom.huggett@dcd.cccounty.us 1

Canales, Megan From: Sent: To: Subject: Follow Up Flag: Flag Status: Russ Leavitt <RLeavitt@centralsan.org> Tuesday, January 13, 2015 9:45 AM Canales, Megan HDP15-14; replacement residence, 4 Dollis Park Road, Lafayette Follow up Flagged The property has received Central Contra Costa Sanitary District (CCCSD) sanitary sewer service and the replacement residence would not be expected to produce an unmanageable added capacity demand on the wastewater system, nor interfere with existing facilities. The applicant must submit full-size building plans for CCCSD to review and pay all appropriate fees, including for capping and abandoning or inspecting the existing sewer lateral for reuse. For more information, the applicant should contact the CCCSD Permit Section at (925) 229-7371. Thanks! Russell B. Leavitt Engineering Assistant III Central Contra Costa Sanitary District (CCCSD) 5019 Imhoff Place Martinez, CA 94553-4316 v (925) 229-7255 f (925) 228-4624 rleavitt@centralsan.org www.centralsan.org 1