ADUs & Additions in Chino

City of Chino Development Services Department, Building Division. Residential permits are issued by the Building Division of Development Services, with applications filed online through the city's Accela permit portal. Chino's pool barrier standard states that a pool enclosure is always required, calls for at least two of the seven state drowning-prevention features on a new or remodeled pool or spa at a single-family home, and requires the barrier to be installed and inspected before the pool is plastered or filled. The zoning code caps a detached ADU at 1,600 square feet in the RD 1 and RD 2 districts and 1,200 square feet elsewhere, and gives the city 30 days, rather than 60, to act on a completed application that uses one of its preapproved ADU plans. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.

Lot size follows the zoning district: the Residential/Agricultural RD 1 and RD 2 districts set one-acre and 20,000-square-foot minimums for new lots, allow horse-keeping and require neighborhood equestrian trail easements, while RD 4.5, the district modeled on many of the city's existing suburban tracts, sets a 7,200-square-foot minimum. One local condition that shapes the work: The Preserve, south of Kimball Avenue, spans about 5,435 acres of former and existing farm and dairy property, with roughly half planned to remain open space and a network of paseos and trails, so newer lots can sit beside working land.

All of it, including The Preserve, College Park and East Chino. 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.