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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 Building,Green renovation,San Francisco | 1 Comment

SF AIA Homes Tour, sf aia, architecture in the city, design events, sustainable design [1]

One of the most impressive aspects about this project is the budget. At just $176 per square foot, SFOSL [2]‘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.

SF AIA Homes Tours, sf aia, architecture in the city, design events, sustainable design [3]

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.

AIA Homes Tour, sf aia, architecture in the city, design events, sustainable design [4]

SFOSL [2] 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 [5]. Also worth noting, a 1.7 kW solar system is hidden on the new roof and new, energy-efficient AlumaTherm [6] windows were installed throughout the home.

sfosl, 20th street residence, green renovation, Grygoriy Ladigin, Capser Mork Ulnes, Andreas Tingulstaed, SF AIA Homes Tour, green renovation, solar-powered home, san francisco renovation, san francisco, portrero hill, green building, sustainable architecture, green architecture, sf aia, architecture and the city, aia [7]

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 [8] envelope the sunken courtyard below and bring new life to every edge, just as the designers of SFOSL have aimed to do.

+ SFOSL [2]

Architecture and the City Festival [9]

Photos by Piper Kujac and Clint Wirtanen for Inhabitat

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URL to article: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/

URLs in this post:

[1] Image: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/bridge-at-back/

[2] SFOSL: http://sfosl.com/projects/20th-street-residence

[3] Image: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/me-and-bridges-in-garden/

[4] Image: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/kitchen-7/

[5] Top Secret: http://www.topsecretcoatings.com/

[6] AlumaTherm: http://www.alumatherm.us/

[7] Image: http://inhabitat.com/sfosls-stunningly-renovated-20th-street-residence-in-portrero-hill-tops-aia-sf-homes-tours/view-of-rear-yard-from-bridge/

[8] Flora Grubb: http://floragrubb.com/idx/index.php

[9] Architecture and the City Festival: http://www.archandcity.org/

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