Cost, timing and what to ask
The 8 questions that actually decide roof replacement, answered with estimated ranges.
Note 01Is a 10 year old roof considered old?
No, not for most coverings. Asphalt shingle roofs are generally rated at 15 to 30 years and tile lasts considerably longer, so a ten-year-old roof is usually mid-life or younger. What matters at ten years is the details: flashings, pipe boots, vents and, on tile, the underlayment. If you are buying, a written read of those details tells you far more than the roof's age.
Note 02What is the typical cost to replace a roof in California?
Published California averages run from about $9,000 to $22,000. In Brea, contractors' published estimates put asphalt shingle on a typical single-family home at about $9,500 to $18,000, standard roofs at up to about $25,000, and concrete tile from about $18,000. Your own figure depends on the roof shape, the layers coming off and the deck underneath, so it is a written quote once the roof has been seen.
Note 03Do you need a permit to get your roof redone?
In Brea, yes. The City requires a permit for a re-roof, issued by the Building & Safety Division at 1 Civic Center Circle, and the 2025 California Building Standards Code has been enforced here since January 1, 2026. The contractor doing the work normally pulls it, and it should be named in the quote. If you are buying, ask for the permit record of the existing roof.
Note 04Is $30,000 too much for a roof?
For asphalt shingle on a typical Brea home it is above the published estimates of about $9,500 to $25,000, so ask what is driving it. It can be reasonable for concrete tile, which starts from about $18,000, or for a large Eagle Hills house with steep gables and many valleys. The total alone does not settle it; the itemized roof area, tear-off, decking rate and permit do.
Note 05What is the average cost of roof repair in California?
Most minor roof repairs in California are estimated at $350 to $1,800, and larger structural repairs at about $1,800 to $5,000 and up. A few lifted shingles or a cracked tile sits at the low end; a valley rebuilt or underlayment renewed under a tile slope sits higher. Every repair is priced on its own after the roof has been seen.
Note 06What to look for when choosing a roofing contractor?
A CSLB C-39 license number you can check, a down payment no larger than California allows ($1,000 or 10 percent, whichever is less), a written quote that names the materials and the Brea re-roof permit on a replacement, and a roofer who looks at the roof and the ceilings under it before pricing anything. And one who will tell you when nothing needs doing yet.
Note 07What are five signs that my roof needs to be replaced?
Leaks in more than one place at once; shingles curling or bare of granules across whole slopes, or tile slipping across a whole slope; a sag you can see from the street; daylight through the deck in the attic; and repairs needed every season. Age is a prompt to have the roof read, not a verdict on its own. One sign by itself is usually a repair.
Note 08How often should a roof be replaced?
When it stops being repairable, not on a calendar. Asphalt shingles are generally rated at 15 to 30 years and tile lasts longer, though the underlayment under tile usually gives out before the tile does. A roof is done when it leaks in several places, sags, or needs a new repair every season, and not before. For a sale, that answer belongs in writing.
All of it, priced
Estimated ranges for Orange County, and a written quote once the job is seen.
Roof Replacement - $9,500 - $25,000 (est.)
Asphalt shingle; concrete tile from about $18,000.
Roof Repair - $350 - $1,800 (est.)
Minor repairs; major repairs $1,800 - $5,000+.
Roof Leak Repair - $350 - $1,800 (est.)
Tracing the entry point included.
Emergency Roof Repair - $350 - $1,500 (est.)
Temporary cover quoted on its own first.
Tile Roofing - $350 - $1,800 repair (est.)
Concrete tile replacement from about $18,000.
Flat Roof Repair - $750 - $3,500 (est.)
California range for flat roof repair.

Want a figure on it?
The estimated range before we travel, and the figure in writing before any work starts.
