Roofing in Altadena runs through the Building and Safety arm of Los Angeles County Public Works, since Altadena is unincorporated. The County reroofing manual and the state cool roof test in climate zone 9 shape every replacement.
Altadena homes, by the census
ACS 2020-2024 gives Altadena a median year built of 1946 and about 10,072 owner-occupied single-family homes (U.S. Census Bureau). Those totals cover the whole community.
A median of 1946 moves the deck and flashing to the front of the inspection, ahead of any choice of covering.
Climate zone 9 in Altadena
Altadena is in climate zone 9 (California Energy Commission zone list). Past 50 percent of a single-family roof the state cool roof test starts, and overlays count (California Energy Commission, 2022 Standards).
Anyone rebuilding should ask the permit office about Executive Order N-29-25, which the California Energy Commission cites when it sets aside parts of the 2025 update for a house that burned in the 2025 Los Angeles fires.
County permits and fire zones
In County jurisdiction, a reroof needs a building permit. A solar system that comes off and goes back on needs a separate solar permit. Clay or concrete tile has to be removed fully before reroofing with any material, existing wood shakes must go, and a change to metal needs Regional Planning approval (LA County Public Works, BCM 1512, 1 Apr 2025).
In north Altadena and the San Gabriel foothills, County Planning names a Very High zone among the constraints on property. Check the address on the CAL FIRE map viewer.
Which jobs we take in Altadena
Replacements, reroofs and new roofs are the work we plan around, rebuilds included.
Altadena roofing, answered
What do the house ages in Altadena mean for the roof?
Open with the lower layers. With 1946 as the median build year, the deck boards and flashing are checked at tear-off, and the covering is chosen once their condition is known.
Which roofing jobs do you take in Altadena?
Replacements, reroofs and new roofs, including rebuilds, in tile, shingle, metal or flat roofing. Each request is read before we phone.
Is Altadena in a fire hazard severity zone?
County Planning names the Very High zone as a constraint in north Altadena and the foothills. Other parts may differ, so check the address on the CAL FIRE map viewer.