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Item 6 - Staff Report and Attachments 1 to 6 PREPARED BY: SEAN MULLIN, AICP Senior Planner 110 E. Main Street Los Gatos, CA 95030 ● 408-354-6874 www.losgatosca.gov TOWN OF LOS GATOS HISTORIC PRESERVATION COMMITTEE REPORT MEETING DATE: 01/26/2022 ITEM NO: 6 DATE: January 21, 2022 TO: Historic Preservation Committee FROM: Joel Paulson, Community Development Director SUBJECT: Preliminary Review for Construction of Exterior Alterations and a Second- Story Addition Greater than 100 Square Feet to an Existing Single-Family Residence on Property Zoned R-1:8 Located at 50 Hernandez Avenue. APN 510-20-003 PROPERTY OWNER: Richard Archuleta and Chrissy Klander. APPLICANT: Jay Plett, Architect. PROJECT PLANNER: Sean Mullin RECOMMENDATION: Consider a preliminary review of a request for construction of exterior alterations and a second- story addition greater than 100 square feet to an existing single-family residence on property zoned R-1:8 located at 50 Hernandez Avenue. PROPERTY DETAILS: 1. Date primary structure was built: 1903 (effective year built 1920) per County Assessor’s Database 2. Town of Los Gatos Historic Status Code: Unknown 3. Does property have an LHP Overlay? No 4. Is structure in a historic district? No 5. If yes, is it a contributor? N/A 6. Findings required? No 7. Considerations required? Yes DISCUSSION: The Santa Clara County Assessor’s Database lists a construction date of 1903 for the existing residence, with an effective year build date of 1920, indicating substantial construction occurred to the residence. The 1990 Anne Bloomfield Survey provides some information on the subject residence but shows some uncertainty of its construction date (Attachment 1). Some of the Bloomfield materials seem to corroborate the County Assessor’s date of 1903 and include PAGE 2 OF 3 SUBJECT: 50 Hernandez Avenue DATE: January 21, 2022 N:\DEV\HISTORIC PRESERVATION\HPC Reports and Attachments\2022\01-26-22\Item 06 - 50 Hernandez Ave\Staff Report.docx DISCUSSION (continued): some notations that the residence was a rental house of the larger Seeley property. The Sanborn Fire Insurance maps show the residence on the subject property in 1904 through 1956, showing some moderate changes occurring to the building footprint through that period (Attachment 2). Lastly, the applicant has submitted blueprints dated 1947 showing a remodel and a kitchen addition on the upper level (Attachment 3). The existing Colonial Revival two-story residence (Attachment 4) is located on the north side of Hernandez Avenue at the intersection with Palm Avenue. The applicant is requesting preliminary review of a proposal to construct additions to the rear of the existing upper and lower floors, and improvements to the basement level to create habitable space (Attachment 6). The additions to the upper floor would be constructed to the rear of the master bedroom and living room. Additions at the lower level would be made to the kitchen and family rooms. A new terrace would project off the rear of the residence, partially covered by a roof supported by columns to match the existing columns on the residence. The area below the lower level would be excavated and improved to create a habitable basement space, daylighting to the rear of the residence. While some of the existing windows would remain, the proposal includes new windows on each level, including reconfiguration and replacement of windows on the street- facing façade. All new materials are proposed to match existing, except for a new standing seam metal roof above the new terrace at the rear of the residence. CONCLUSION: The applicant is seeking preliminary feedback from the Committee on the proposal. Should the Committee find merit in the request, the project would require approval of a Minor Residential Development application and would return to the Committee under this application for a recommendation to the Community Development Director. CONSIDERATIONS: A. Considerations Sec. 29.80.290. Standards for review. In evaluating applications, the deciding body shall consider the architectural style, design, arrangement, texture, materials and color, and any other pertinent factors. Applications shall not be granted unless: For pre-1941 structures, the proposed work will neither adversely affect the exterior architectural characteristics or other features of the property which is the subject of the application. PAGE 3 OF 3 SUBJECT: 50 Hernandez Avenue DATE: January 21, 2022 N:\DEV\HISTORIC PRESERVATION\HPC Reports and Attachments\2022\01-26-22\Item 06 - 50 Hernandez Ave\Staff Report.docx CONSIDERATION (continued): B. Residential Design Guidelines Section 4.9 of the Town’s Residential Design Guidelines offers recommendations for additions to historic resources through reference to Section 3.9 (Attachment 5). ATTACHMENTS: 1. 1990 Anne Bloomfield Survey 2. Sanborn Map Exhibit 3. Excerpts from 1947 Plans for Addition 4. Exterior Photos 5. Section 3.9, Residential Design Guidelines 6. Development Plans This Page Intentionally Left Blank 1904 50 Hernandez Ave ATTACHMENT 2 1908 50 Hernandez Ave 1928 50 Hernandez Ave 1956 50 Hernandez Ave 01.12.22 archuletaremodel & addition50 hernandez avereference plans- 1947 remodel r-1 ATTACHMENT 3 01.12.22 archuletaremodel & addition50 hernandez avereference plans- 1947 remodel r-2 01.12.22 archuletaremodel & addition50 hernandez avereference plans- 1947 remodel r-3 This Page Intentionally Left Blank ATTACHMENT 4 This Page Intentionally Left Blank Residential Design Guidelines 33 Town of Los Gatos BUILDING DESIGN3 3.8.3 Use traditional detailing •Treat openings in walls as though they were constructed of the traditional material for the style. For example, be sure to provide substantial wall space above arches in stucco and stone walls. Traditionally, wall space above the arch would have been necessary to structurally span the opening, and to make the space too small is inconsistent with the archi- tectural style. •Openings in walls faced with stone, real or synthetic, should have defined lintels above the opening except in Mission or Spanish Eclectic styles. Lintels may be stone, brick or wood as suits the style of the house. •Treat synthetic materials as though they were authentic. For example, select synthetic stone patterns that place the individual stones in a horizontal plane as they would have been in a load bearing masonry wall. •Select roof materials that are consistent with the traditional architectural style (e.g., avoid concrete roof tiles on a Crafts- man Style house.) 3.8.4 Materials changes •Make materials and color changes at inside corners rather than outside corners to avoid a pasted on look. 3.9 ADDITIONS/ACCESSORY BUILDINGS/SECONDARY UNITS •Site additions in the least conspicuous place. In many cases this is a rear or side elevation - only rarely is it a rooftop. •The existing built forms, components and materials should be reinforced. Heights and proportions of additions and alterations should be consistent with and continue the original architectural style and design. •Additions should be subordinate, and compatible in scale and proportion to the historically significant portions of the existing structure. •When an addition or remodel requires the use of newly constructed exterior elements, they should be identical in size, dimension, shape and location as the original, and Use stone or wood lintels over openings in stone walls Additions, accessory buildings and secondary units should match the form, architectural style, and details of the original house ATTACHMENT 5 Residential Design Guidelines34 Town of Los Gatos BUILDING DESIGN3 should utilize the same materials as the existing protected exterior elements. •When an addition necessitates the removal of architectural materials, such as siding, windows, doors, and decorative elements, they should be carefully removed and reused in the addition where possible. •The introduction of window and door openings not char- acteristic in proportion, scale, or style with the original architecture is strongly discouraged (e.g., sliding windows or doors in a structure characterized by double hung windows and swinging doors). •The character of any addition or alteration should be in keeping with and subordinate to the integrity of the original structure. •The amount of foundation exposed on the addition should match that of the original building. •Do not add roof top additions where the roof is of historic significance. •Second floor additions are discouraged in neighborhoods with largely one story homes. If horizontal expansion of the house is not possible, consider incorporating a second floor addition within the roof form as shown in the example to the left. •Second floor additions which are not embedded within the roof form should be located to the rear of the structure. •The height and proportion of an addition or a second story should not dominate the original structure. •Deck additions should be placed to the rear of the struc- ture only, and should be subordinate in terms of scale and detailing. •New outbuildings, such as garages, should be clearly subor- dinate to the main structure in massing, and should utilize forms, materials and details which are similar to the main structure. •Garages should generally be located to the rear of the lot behind the rear wall of the residence. One car wide access driveways should be utilized. Original structure Addition incorporated into the roof successfully adds space while respecting the integrity of the existing house and the scale of the neighborhood Placing a two story addition to the rear can minimize its impact on the historic resource and the scale of the neighborhood 3068266840632663 2868 TUBBEDRM 1 2868 28684068 5263 2068M. BEDRM 2868 23682364 W.C110310LIVING ROOM 2358F.P DNM. BATHCLOSET5680 117635063GASELEC2030FRONT PORCH 266814332030 2668 GARAGE233662362568OFFICE 1OFFICE 2AS BUILT- DEMO FLOOR PLAN RESULTS EXTERIOR WALLSRESULTS EXTERIOR WALLS(E) EXTERIOR WALLS 155.55 LF(E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%)- (E) EXTERIOR WALLS TO BE REMOVED- (E) INTERIOR WALLS TO BE REMOVED- (E) WALL TO BE REMAINLEGENDLEGENDUPENTRY FUTURE A.D.U (N) WDW n 01.12.22 archuletaremodel & addition50 hernandez avea-1site plan 1/8"= 1'0" table of contents a-1 site plan / general info a-2 floor plans a-3 ROOF PLAN / NORTH & south ELEVATION / section a-4 EAST / WEST elevations ABD1 AS BUILT-DEMO PLAN SITE PARTICULARS APN 510-20-003 ZONING R-1:8 AREA SUMMARY SITE AREA 10,029 SF avg slope = 9.6% FAR allowedhouse = 0.310 allowed floor area = 3106.5 sf existing floor area = 2244.0 sf available to add = 978.5 sf proposed floor area EXISTING ADDED TOTALS upsatirs 1,197 sf 160 SF 1,357 sf downstairs 1047 SF 139 SF 1,186 sf basement flr area 255.5 sf 255.5 sf TOTAL (E) 2244 sf total house add 554.5 sf total house FLR AREA 2798.5 sf (e) accessory 160 TOTAL FLR AREA 2,958.5 sf basement (below grade) 532 sf ATTACHMENT 6 3068266840632663 2868TUBBEDRM 1 286828684068 5263 2068 M. BEDRM 28682368 2364 W.C110310 LIVING ROOM 2358 F.PDNM. BATH CLOSET5680 11763 5063GASELEC2030FRONT PORCH26681433 20302668GARAGE 2336 6236 2568 OFFICE 1 OFFICE 2 AS BUILT- DEMO FLOOR PLANRESULTS EXTERIOR WALLS RESULTS EXTERIOR WALLS (E) EXTERIOR WALLS 155.55 LF(E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%)- (E) EXTERIOR WALLS TO BE REMOVED- (E) INTERIOR WALLS TO BE REMOVED- (E) WALL TO BE REMAINLEGEND LEGEND UPENTRY FUTURE A.D.U (N) WDWn3068266840632663 2868TUBBEDRM 1 286828684068 5263 2068 M. BEDRM 28682368 2364 W.C110310 LIVING ROOM 2358 F.P DNM. BATH CLOSET5680 11763 5063GASELEC2030FRONT PORCH 26681433 20302668 GARAGE 2336 6236 2568 OFFICE 1 OFFICE 2 AS BUILT- DEMO FLOOR PLAN RESULTS EXTERIOR WALLS RESULTS EXTERIOR WALLS (E) EXTERIOR WALLS 155.55 LF(E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%)- (E) EXTERIOR WALLS TO BE REMOVED- (E) INTERIOR WALLS TO BE REMOVED- (E) WALL TO BE REMAINLEGEND LEGEND UPENTRY FUTURE A.D.U (N) WDW 01.12.22 archuletaremodel & addition50 hernandez aveUPSTAIRS floor plan 1/4"= 1'0" a-2 DOWNSTAIRS floor plan 1/4"= 1'0" 30682668406326632868TUBBEDRM 128682868406852632068M. BEDRM286823682364W.C110310LIVING ROOM2358F.PDNM. BATHCLOSET5680117635063GASELEC2030FRONT PORCH2668143320302668GARAGE233662362568OFFICE 1OFFICE 2AS BUILT- DEMO FLOOR PLANRESULTS EXTERIOR WALLSRESULTS EXTERIOR WALLS(E) EXTERIOR WALLS155.55 LF(E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%)- (E) EXTERIOR WALLS TO BE REMOVED- (E) INTERIOR WALLS TO BE REMOVED- (E) WALL TO BE REMAINLEGENDLEGENDUPENTRY FUTURE A.D.U (N) WDW 30682668406326632868TUBBEDRM 128682868406852632068M. BEDRM286823682364W.C110310LIVING ROOM2358F.PDNM. BATHCLOSET5680117635063GASELEC2030FRONT PORCH2668143320302668GARAGE233662362568OFFICE 1OFFICE 2AS BUILT- DEMO FLOOR PLANRESULTS EXTERIOR WALLSRESULTS EXTERIOR WALLS(E) EXTERIOR WALLS155.55 LF(E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%)- (E) EXTERIOR WALLS TO BE REMOVED- (E) INTERIOR WALLS TO BE REMOVED- (E) WALL TO BE REMAINLEGENDLEGENDUPENTRY FUTURE A.D.U (N) WDWn30682668406326632868TUBBEDRM 128682868406852632068M. BEDRM286823682364W.C110310LIVING ROOM2358F.PDNM. BATHCLOSET 568011763 5063 GASELEC2030 FRONT PORCH 2668143320302668GARAGE233662362568OFFICE 1OFFICE 2 AS BUILT- DEMO FLOOR PLAN RESULTS EXTERIOR WALLSRESULTS EXTERIOR WALLS (E) EXTERIOR WALLS155.55 LF (E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%) - (E) EXTERIOR WALLS TO BE REMOVED - (E) INTERIOR WALLS TO BE REMOVED - (E) WALL TO BE REMAINLEGENDLEGENDUPENTRY FUTURE A.D.U (N) WDW 01.12.22 archuletaremodel & addition50 hernandez avea-3 north elevation 1/4"= 1'0" (E) HOUSE PHOTO south elevation 1/4"= 1'0" roof plan 1/4"= 1'0" section 1/4"= 1'0" 30682668406326632868TUBBEDRM 128682868406852632068M. BEDRM286823682364W.C110310LIVING ROOM2358F.PDNM. BATHCLOSET5680117635063GASELEC2030FRONT PORCH2668143320302668GARAGE233662362568OFFICE 1OFFICE 2AS BUILT- DEMO FLOOR PLANRESULTS EXTERIOR WALLSRESULTS EXTERIOR WALLS(E) EXTERIOR WALLS155.55 LF(E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%)- (E) EXTERIOR WALLS TO BE REMOVED- (E) INTERIOR WALLS TO BE REMOVED- (E) WALL TO BE REMAINLEGENDLEGENDUPENTRY FUTURE A.D.U (N) WDW 30682668406326632868TUBBEDRM 128682868406852632068M. BEDRM286823682364W.C110310LIVING ROOM2358F.PDNM. BATHCLOSET5680117635063GASELEC2030FRONT PORCH2668143320302668GARAGE233662362568OFFICE 1OFFICE 2AS BUILT- DEMO FLOOR PLANRESULTS EXTERIOR WALLSRESULTS EXTERIOR WALLS(E) EXTERIOR WALLS155.55 LF(E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%)- (E) EXTERIOR WALLS TO BE REMOVED- (E) INTERIOR WALLS TO BE REMOVED- (E) WALL TO BE REMAINLEGENDLEGENDUPENTRY FUTURE A.D.U (N) WDW 01.12.22 archuletaremodel & addition50 hernandez avea-4 east elevation 1/4"= 1'0" 3068 2668406326632868TUBBEDRM 1 2868 2868406852632068M. BEDRM28682368 2364 W.C 110310 LIVING ROOM2358 F.P DNM. BATH CLOSET 568011763 5063 GASELEC2030 FRONT PORCH 2668143320302668GARAGE233662362568OFFICE 1OFFICE 2 AS BUILT- DEMO FLOOR PLAN RESULTS EXTERIOR WALLSRESULTS EXTERIOR WALLS (E) EXTERIOR WALLS155.55 LF (E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%) - (E) EXTERIOR WALLS TO BE REMOVED - (E) INTERIOR WALLS TO BE REMOVED - (E) WALL TO BE REMAIN LEGENDLEGEND UP ENTRY FUTURE A.D.U (N) WDW west elevation 1/4"= 1'0" 3068 26684063 2663 2868 TUB BEDRM 1 2868 2868 4068 5263 2068 M. BEDRM 2868 2368 2364 W.C 110310 LIVING ROOM 2358 F.P DN M. BATH CLOSET 5680 11763 5063 GAS ELEC 2030 FRONT PORCH 26681433 20302668 GARAGE 2336 6236 2568 OFFICE 1 OFFICE 2 AS BUILT- DEMO FLOOR PLAN RESULTS EXTERIOR WALLS RESULTS EXTERIOR WALLS (E) EXTERIOR WALLS 155.55 LF (E) EXTERIOR WALLS TO BE REMOVED 35.25 LF (22.6%) - (E) EXTERIOR WALLS TO BE REMOVED - (E) INTERIOR WALLS TO BE REMOVED - (E) WALL TO BE REMAIN LEGEND LEGEND UP ENTRY FUTURE A.D.U (N) WDW 2264 2064 W.C 2026 10"x 44 2046TUB 5168 2031191068 2868 70311 4031171168 FAMILY ROOM STUDY UP 21134 3068 KITCHEN 2868 11144 GARAGE WDWH F CRAWL SPACE OPENING DISTANCE TO BE VERIFIED 2868 SCREENED PORCH 2868 RESULTS EXTERIOR WALLS RESULTS EXTERIOR WALLS (E) EXTERIOR WALLS 252.40 LF (E) EXTERIOR WALLS TO BE REMOVED 105.95 LF (41.95%) - (E) EXTERIOR WALLS TO BE REMOVED - (E) INTERIOR WALLS TO BE REMOVED - (E) WALL TO BE REMAIN LEGEND LEGEND n01.12.22 archuletaremodel & addition50 hernandez aveUPSTAIRS- AS BUILT/DEMO 1/4"= 1'0" DOWNSTAIRS- AS BUILT/DEMO 1/4"= 1'0" aB/D-1 This Page Intentionally Left Blank