Altadena, Los Angeles County

Foundation and seismic work in Altadena

Seismic bracing and foundation repair in Altadena by Aspenwell Construction, permitted through Los Angeles County, with ember-resistant exterior choices.

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Does a house in Altadena get its permit from Pasadena or from the county? The answer is the county, and it shapes the whole job. With no city government of its own, Altadena sends plans for a cripple wall retrofit, a foundation repair or a beam where a wall comes out to Los Angeles County Building and Safety. Pasadena sits right beside it as a separate city with its own counter, so an address is checked before drawings go in.

Mountain ground and the footings on it

Altadena falls in the mountain zone, and ground of that kind can vary between lots that share a fence. One parcel may rest on firm native soil while the next carries fill that was placed to level it. If the lot slopes, the downhill side of the house may stand on taller cripple walls, which need plywood and hold-downs sized for the extra height. On a flat lot the work can be simpler, but we still dig beside a footing to see its depth and the soil under it before an engineer decides how the new load path reaches the ground.

Ember-resistant choices at the base of the house

Parts of Altadena are mapped as fire hazard zones, and a lot there may face rules for exterior work that resists embers. Several of those rules land right where structural work happens. Foundation vents may need a finer mesh, siding close to grade may need to be noncombustible, and any new addition can call for a Class A roof and enclosed eaves. We read the county requirements for the parcel during design, so a retrofit that opens the lower walls closes them back up with materials that meet the rule, and the inspector sees both at once.

What we build in Altadena

Structural work comes first on this list, and every service starts with a look at the framing and foundation.

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Plan structural work in Altadena

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