Roofing in Brentwood, CA

National cost guides put architectural shingle replacement at roughly $4–$6 per square foot installed and concrete tile at roughly $7–$19 per square foot (HomeGuide, This Old House). Angi lists California's average shingle replacement at about $15,200. Your price depends on roof size, pitch, layers to remove, deck repairs and whether solar panels must come off. Our cost guide shows the sources and the math.

The well-known 25% rule comes from the Florida Building Code. California has no statewide 25% rule. What California does have: when more than 50% of a roof is replaced within a year, the whole roof covering must meet the fire rating for its area, and Title 24 cool-roof rules can apply to large steep-slope reroofs. Our repair-or-replace guide explains both.

Call or send a request and we'll pass it to an independent local roofing contractor. While you wait, move belongings away from the drip, catch the water, photograph the damage, and stay off a wet roof. Our leak page lists the steps.

Often, yes. Concrete and clay tiles themselves can last for decades; the underlayment beneath them usually wears out first. Cracked tiles can be swapped and worn underlayment can be replaced by lifting and re-laying the existing tiles, which usually costs less than a full new roof.

In East Contra Costa, generally yes. Antioch and Contra Costa County (which covers Discovery Bay) state that re-roofs need a permit, Oakley issues re-roof permits over the counter, and Brentwood lists re-roofs as a building permit type. Your contractor normally pulls the permit — confirm it in writing.