Hidden Hills, Los Angeles County

Decks, Retaining Walls and Additions in Hidden Hills

Decks, retaining walls and additions in Hidden Hills, drawn for city plan review, with ember-resistant details for a parcel inside a mapped fire hazard zone.

Tell us about the lot and the job

A builder reads it and calls or emails you back. Nothing is booked until you agree to it. How we use your details.

To send, add what you are interested in, your first name and a phone number or an email.

Hidden Hills is a city of its own within Los Angeles County, and plans for a deck, wall or addition there go to the building department that serves it. Its plan checker reads the structural calculations, footing details and materials schedule before a permit is issued. We prepare each sheet so the questions a reviewer raises about loads, setbacks and fire safety are already answered on the page.

Ember rules for decks and additions

Fire safety shapes the materials list here. Portions of Hidden Hills are mapped as fire hazard zones, so a house on a mapped lot may need to meet the code chapter written to keep embers out. On a deck, those may call for a surface listed for the zone, a noncombustible strip where the deck meets the house, and an underside closed or screened so embers cannot collect. A new addition gets vents with fine ember mesh, a class A roof assembly and exterior siding approved for that use. Each product and its approval is called out on the drawings, which lets the reviewer confirm compliance one sheet at a time.

Footings, grade and site access

If the lot slopes, a soils report comes before the structural design, since footing depth and setback from a downhill face depend on it. A retaining wall taller than the code exemption needs engineered drawings and an inspection of the steel before concrete is placed. Equipment access is part of planning too, because a pump line or a small excavator has to reach the work area without crossing finished hardscape. Nearby Calabasas, West Hills, Woodland Hills and Topanga get the same preparation, each filed with whichever agency covers that address.

Work we take on in Hidden Hills

Each service is planned around the lot, sloped or level.

Cities nearby

Building in Hidden Hills?

Send the address and the job, and a builder will arrange a visit to read the lot.

Ask for a callbackDescribe your lot