ADUs & Additions in Pomona

City of Pomona Development Services Department, Building and Safety Division. Residential permits come from the Building and Safety Division of the Development Services Department at City Hall, 505 South Garey Avenue, while zoning questions go to the Planning Division in the same department. The division's grading handout requires a grading permit, with plans stamped by a California-registered professional engineer and a geotechnical report, for earthwork that disturbs at least 50 cubic yards of soil or that the Building Official calls for based on site characteristics or location. The Zoning and Development Code's pool standards keep a pool and its mechanical equipment at least 5 feet from rear, side and street-side lot lines and out of utility easements, and keep a pool with more than 150 square feet of water surface at least 5 feet from any wall of the house. The division's fencing handout calls for a permanent 5-foot fence completely surrounding any pool, spa or other body of water over 24 inches deep, in place and approved by the building inspector before plastering and filling. In the six historic districts, the code's definition of alteration reaches grading, surface paving, walls, fences and tree removal, and no permit is issued for work on a historical resource until a Certificate of Appropriateness or Certificate of Historic Compliance is in place. Additions and new accessory structures there go to the Historic Preservation Commission for a Major Certificate of Appropriateness, and where an ADU needs one, the code limits that review to architecture. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.

Single-family streets on the older gridded blocks around downtown, where a historic district shows up on the zoning map as an -H suffix, and the master-planned tracts of Phillips Ranch and Mountain Meadows, laid out after most of the valley floor had been developed and each governed by its own specific plan. In the Phillips Ranch single-family district, a room addition keeps a 25-foot rear yard measured to the property line or to the toe or top of a slope, and a fully roofed patio cover needs a 5-foot side yard and a 10-foot rear yard. One local condition that shapes the work: The General Plan places Pomona's steep hills in the Ganesha Hills south of the Fairplex and in the Phillips Ranch area, and it confines the city's landslide risk to parts of those same two areas, most of it on designated open space. Slope and soils questions come first for any pool or terrace there.

All of it, including Lincoln Park, Wilton Heights, Hacienda Park and Phillips Ranch. Our crews run every job out of our Cahuenga Pass base in Los Angeles, with our own people on site.

Detached ADU: generally $150,000 to $400,000+ across Southern California. 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.