ADUs & Additions in South Pasadena

City of South Pasadena Community Development Department, Building Division. Residential permits come from the Building Division of the Community Development Department, with entitlements handled by the Planning Division in that same department. Because so much of the housing stock is historic, alterations, additions, and demolitions affecting designated resources go before the Cultural Heritage Commission for a Certificate of Appropriateness. The city's tree ordinance protects all oak species and other mature protected trees, requiring a removal permit and replacement planting, with steep fines for unpermitted removal. The Raymond Fault Alquist-Priolo Earthquake Fault Zone crosses the city, so affected parcels need a fault-rupture study before new habitable space is approved. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing the city.

Most parcels are modest by San Gabriel Valley standards — long, narrow lots with generous street trees and detached garages set at the rear. Hillside neighborhoods trade flat yard for slope and view. In practice that means hillside tracts on the southwest side climb quickly, so pools and outdoor rooms there usually need retaining walls, pier-supported decks, and engineered drainage rather than simple flat-yard construction..

All of it, including Monterey Hills, Altos de Monterey, Mission West, Garfield Park. We are based in Los Angeles at Cahuenga Pass, so South Pasadena is a short run for our crews rather than a job we service from out of the area.

Detached ADU in this market generally runs $150,000 to $400,000+. What moves it is square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build. We give line-item pricing after seeing the site rather than quoting a number over the phone.

Plan a realistic year. Design and engineering typically take one to three months, city plan check and corrections add several more, and construction usually runs four to eight months depending on size and site access.

Usually yes, and often substantially, because the foundation, walls and roof already exist. The trade-offs are that you lose the garage, and older slabs and framing sometimes need upgrading to meet current code.

California ADU law is designed to allow long-term rental, and an ADU is one of the few ways to add rentable square footage to a single-family lot. Short-term rental rules vary by city, so confirm your local ordinance before counting on that income.

Yes. Plans, engineering, Title 24 and the city submittal are all handled in-house, including responding to plan-check corrections. That is a service we sell on its own, so it is not something we hand off.