ADU Construction in Pacific Palisades

ADUs in Pacific Palisades planned from moisture readings on the older house, with coastal and fire hazard rules checked before the unit is designed.

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Our first probe on a Pacific Palisades lot goes into the older house's lowest wood. A moisture meter on the sill plates and lower siding, and an awl pressed into any soft spot, show how damp air and drainage act on wood at that address. Those readings tell us which side of the yard stays wet, where the ADU should not sit, and how its own walls and framing near the ground need protecting.

Reading the wood and the ground

High readings low on the house wall can point to soil piled against the siding, a downspout emptying at the foundation or a missing vapor barrier in the crawl space. Whatever the cause, the lesson carries to the new unit. The ADU sits on a foundation that lifts its framing clear of the soil, with treated sill plates, a capillary break under the slab and grading that falls away from both buildings. If the lot slopes, drainage above the unit gets the same care.

Coastal and fire review on the same lot

LADBS issues the building permit for a Pacific Palisades ADU. A lot here may also lie within the coastal zone, and that can bring its own approval step ahead of the permit, and parts of the area are mapped for fire hazard. On a mapped lot the unit needs a roof rated Class A, ember-screened vents and walls of ignition-resistant material. Near the coast, airborne salt corrodes plain steel, so fasteners and flashing go in stainless or coated metal. Both the coastal and fire status are confirmed on city maps before design.

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