SFOSL’s Stunningly Renovated 20th Street Residence in Portrero Hill Tops AIA SF Homes Tours
Posted By Piper Kujac On October 10, 2012 @ 5:12 pm In Architecture,carousel showcase,gallery,Green renovation,San Francisco,Sustainable Building | 1 Comment
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One of the most impressive aspects about this project is the budget. At just $176 per square foot, SFOSL [6]‘s home remodel on 20th Street cost significantly less than most ‘affordable’ housing projects in the Bay Area, and it’s a shining example of how smart design can create more with less.
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In addition to preservation and budget, the project was restricted by its very narrow lot and a fifteen-foot setback requirement for the top-level addition. The designers were also challenged by the attractive south-facing view and harsh daylight exposure. A perforated, retractable sunshade allows for maximum flexibility while providing the illusion of much more space than a meager 650 square foot addition.
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SFOSL [6] designers maintained a simple, natural aesthetic by keeping rough-cut framing to a minimum and exposing the structure, thereby reducing the number of finishes used. They also reduced demolition and construction waste by crafting built-in bookshelves from the existing roof joists removed during the third story addition. All of the new materials are formaldehyde-free, and surprisingly, the polished wood floor is composed of off-the-shelf oriented strand board (OSB) panels coated with a finish called Top Secret [13]. Also worth noting, a 1.7 kW solar system is hidden on the new roof and new, energy-efficient AlumaTherm [14] windows were installed throughout the home.
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Perhaps our favorite design feature (and also the dogs’ favorite) is the rear catwalk bridge connecting the top floor with the terraced garden beyond. Vertical growing walls by Flora Grubb [16] envelope the sunken courtyard below and bring new life to every edge, just as the designers of SFOSL have aimed to do.
+ SFOSL [6]
Architecture and the City Festival [8]
Photos by Piper Kujac for Inhabitat
Article printed from Inhabitat – Sustainable Design Innovation, Eco Architecture, Green Building: http://inhabitat.com
URL to article: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/
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[6] SFOSL: http://sfosl.com/projects/20th-street-residence
[7] AIA Homes Tours: http://www.aiasf.org/programs/home-tours/
[8] Architecture and the City Festival: http://www.archandcity.org/
[9] San Francisco: http://inhabitat.com/sanfrancisco/
[10] Image: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/bridge-at-back/
[11] Image: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/me-and-bridges-in-garden/
[12] Image: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/kitchen-7/
[13] Top Secret: http://www.topsecretcoatings.com/
[14] AlumaTherm: http://www.alumatherm.us/
[15] Image: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/view-of-rear-yard-from-bridge/
[16] Flora Grubb: http://floragrubb.com/idx/index.php
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