Planned Unit Development, South San Francisco, California

This “Planned Unit Development” provided 8 detached homes consisted of 25,000 square feet on a 0.5 acre lot.  The 8 homes ranging from 2,000 to 3,000 square feet each and cover an area of approximately 36 % of the site.

The design solution evolved as a response to the boundary conditions of the individual parcels, including issues of entry, privacy, views and a desire to create a unique identity for each home within a modern architectural vocabulary. The contemporary design of each home reflects its own identity while maintaining cohesiveness within the subdivision.

The project has evolved through many community outreach meetings and was able to positively respond to the neighbors by providing ample parking spaces and two outdoor courtyards.

CHESTNUT-031705 FINAL-FINAL ACROSS

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construction in progress

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Rotunda House, Millbrae, California

This project is located within the 65 CNEL Aircraft Noise Footprints based upon the Federal Aviation Administration (“FAA”) 1983 CNEL Noise Exposure Map.  If the properties within this map is constructed after Jan. 1st 1983, or is renovated at a cost equal to 25% or more of the current market value of the home, it must be insulated against aircraft noise to meet FAA noise insulation program standards.  This means that the windows must have a Sound Transmission Class (or STC) rating of 35.  A typical interior wall with one layer of 1/2″ gypsum board on each side of wood stud at 16” on center has an STC of approximately 33.

The window manufacturer we selected cannot provide STC 35 certification as a whole window assembly but the glass itself will perform the STC rating of 30 – 35.  We explained the situation with the building official and were able to obtain approval with the glass specification.

See here for list of homes in the noise exposure area.

The Clarendon house, San Francisco, California

The Clarendon house is a 25 foot wide zero lot line property situated on the northern slope of Twin Peaks. The back of the house slopes down and has views from Golden Gate Bridge to downtown and the Bay Bridge. In an effort to preserve these views for the neighboring properties, the expansion was created below the existing house. The program required a 3 bedroom house with large living areas and contemporary style.

The design process was not the “traditional project delivery process” where the owner hires an architect to prepare drawings, then the owner hires a general contractor to bid and build the project. The traditional process creates communication problems and has higher chance of cost increase during construction. In the “traditional project delivery process”, the architect and contractor boundaries are more restricted.

Clarendon was designed under an “integrated project delivery process” where the owner requires a level of sophistication and a willingness to get involved. Contractor and suppliers were appointed from the beginning. The architect issued drawings in a collaborative relationship with the owner, contractor and suppliers. Decisions are made when they need to be made to eliminate redundant work. Contractor and suppliers are able to share their knowledge and expertise when it is most valuable in the design process.