ADUs & Additions in Rancho Palos Verdes

City of Rancho Palos Verdes Community Development Department, Building and Safety Division. Residential permits are issued by the Building and Safety Division of the City's Community Development Department. Rancho Palos Verdes maintains mapped landslide moratorium areas covering Portuguese Bend and the Zone 2 Monks and non-Monks lots; an ordinance adopted in August 2025 and effective the following month permanently prohibits new residential construction and additions within those areas, while replacement, restoration and repair inside an existing footprint remain allowed. Projects in the Coastal Zone need coastal review in addition to a building permit, and the City's geotechnical staff review applies broadly across the peninsula. Confirming a parcel's status against the current landslide maps should be the first step on any project. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing the city.

Generally large, with half-acre parcels common, dramatic slope, canyon frontage and ocean views, and a meaningful share of properties inside or adjacent to mapped landslide areas. In practice that means active and historic land movement across the southern coastal shelf means geotechnical and City geologist review can determine whether a project is feasible at all..

All of it, including Portuguese Bend, Miraleste, Del Cerro, Mira Catalina. We are based in Los Angeles at Cahuenga Pass, so Rancho Palos Verdes 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.