ADUs and additions, Chatsworth, Los Angeles County
ADU Construction in Chatsworth
Chatsworth ADUs start with the roof: inland sun, dry wind and ember-resistance rules on lots in mapped fire hazard zones, compared across every unit type.
On a new Chatsworth unit the roof does the hardest work, taking hard sun, dry wind and the occasional heavy storm on an inland lot. Parts of Chatsworth sit inside mapped fire hazard zones. Where an address falls in one, ember-resistance rules may apply and reach the roof covering, vents and eaves. We settle the roof before the floor plan, because its materials shape what each ADU type costs and how it passes review.
Roof assembly against embers and heat
Where ember rules apply, the roof gets a Class A covering, such as concrete tile, metal or a rated composition shingle, laid over a solid deck. Attic and soffit vents use fine metal mesh or baffled designs that keep sparks out while letting hot air escape. Eaves are boxed in with noncombustible material, and gutters get guards so dry leaves cannot gather. A light roof color and a radiant barrier help the unit stay cooler under strong sun. Every one of these items gets its own priced line, which makes the cost of the fire rules plain.
How each unit type meets the rules
A detached unit is built new from the deck up, so every part of it can be specified to the ember standard from the start. An attached unit ties into the existing roof, and the old covering near the joint may need replacing to match. A garage conversion keeps a roof that was never designed for these rules, so we check whether it can stay. A JADU lives inside the house and inherits its roof. Chatsworth permits go through LADBS, and its plan checkers confirm the fire hazard requirements before any framing starts.
What we build in Chatsworth
Second units and room additions lead, with the rest of our services available on the same lot.
Planning a unit in Chatsworth?
Send the address. We check which ADU types the lot allows and reply with the next step.