--- title: "Roof Replacement Cost in Altadena (2026) | Keystone Connect" description: "Roof replacement in Altadena, CA: $8–$17 per sq ft (installed) in 2026. A mid-size job runs $16k–$35k. Free bids from vetted builders." url: https://keystoneconnect.us/cities/altadena/roof-replacement updated: 2026-10-27 --- Altadena, CA · West San Gabriel Valley # Roof replacement prices in Altadena, CA: 2026 ranges A roof replacement in Altadena costs $8–$17 per sq ft (installed), with a typical mid-size roof running $16k–$35k. Small projects start around **$10k**; large or high-end work can reach **$61k** or more. As of 2026, costs in Altadena run about 8% above the LA County baseline due to Eaton Fire rebuilds and LA County rebuild permitting. Updated October 2026 Get matchedCost by size Cost per sq ft (installed) $8–$17 per sq ft (installed) ## Roof Replacement Cost by Size in Altadena Totals adjusted for the Altadena market (1.08× LA County baseline). Ranges include labor, materials, permits, and contractor overhead. Roof Replacement cost by size in Altadena, CA | Size | Type | Range | Low | High | | --- | --- | --- | --- | --- | | Small | Small home | 1,200–1,500 sq ft | $10k | $20k | | Medium | Typical home | 1,800–2,400 sq ft | $16k | $35k | | Large | Large home | 2,800–3,500 sq ft | $26k | $61k | ## What Affects Roof Replacement Cost in Altadena? - Roofing material (asphalt vs tile vs metal). - Decking condition. - Layers to tear off. - Roof pitch. - Wildfire-zone Class A requirements. - Altadena market premium: local pricing reflects Eaton Fire rebuilds and LA County rebuild permitting, which shifts totals about 8% above the LA County baseline. ## Get exact roof replacement bids in Altadena Two or three licensed builders who work in Altadena, pricing the same scope. Tell us about your project[or call (818) 482-8365](tel:+18184828365) ## Roof Replacement Sub-Type Comparisons ### Asphalt Shingle Roof vs Clay Tile Roof Asphalt shingles cost $10k–$25k and last 20–30 years; clay tile costs $25k–$55k and lasts 50–75 years — a better fit for mid- and upper-tier LA neighborhoods with HOA aesthetic standards. ### Roof Repair vs Full Replacement vs Metal Roof Spot repairs run $500–$3,500 and buy 2–5 years; standing-seam metal replacement costs $24k–$56k but lasts 40–60 years and meets wildfire Class A requirements. ## How to Get the Best Price on a Roof Replacement in Altadena 1. Get line-itemized bids from two or three builders on the same scope; Altadena roof replacement pricing commonly varies 10–25% between contractors. 2. Lock major materials and finishes before signing; mid-project change orders are the #1 cost driver on roof replacement jobs. 3. Bid in shoulder seasons (Jan–Mar or Sep–Oct) when Altadena contractor schedules are open and rush premiums disappear. 4. Verify CSLB license, insurance, and bond before paying any deposit. California caps deposits at $1,000 or 10% of contract, whichever is less. ## What is a roof replacement? A roof replacement tears the old roofing off down to the deck, repairs damaged sheathing, and installs new underlayment, flashing and roofing: asphalt shingle, tile or metal. ## How to get an accurate price 1. 1.Write down the scope: size, any layout changes, the finish level, and who supplies fixtures and materials. 2. 2.Get bids from two or three licensed builders who work in Altadena, all pricing that same roof replacement scope. 3. 3.Line the bids up item by item. Check allowances, permits, exclusions, and whether overhead and profit are shown. 4. 4.Before any deposit, check each builder's CSLB license and insurance. As of 2026, California caps a home improvement down payment at $1,000 or 10% of the contract, whichever is less, according to the Contractors State License Board. Already have a bid? [Grade it in two minutes](https://keystoneconnect.us/grade-my-bid) or read [how to compare quotes](https://keystoneconnect.us/pillars/how-to-read-compare-contractor-quotes). ## Questions about Roof Replacement in Altadena ### How much does a roof replacement cost in Altadena, CA? + A roof replacement in Altadena costs $10k–$61k, with a typical mid-size roof running $16k–$35k. Per-unit pricing falls in the $8–$17 per sq ft (installed) range. ### Do I need a permit for a roof replacement in Altadena? + Yes for most scopes — LADBS or the local city building department requires permits any time you move plumbing, gas, electrical, or alter structure. Like-for-like cosmetic refreshes generally don't. ### How long does a roof replacement take in Altadena? + Plan for 4–14 weeks of construction in Altadena depending on size and complexity, plus 2–8 weeks for design, permits, and material lead times. ## Official sources - [Look up a contractor's license on the CSLB website](https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx) - [California home improvement contract requirements (Business and Professions Code §7159)](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC§ionNum=7159) Need more answers? Visit our [contractor FAQ hub](https://keystoneconnect.us/faq). ## Get Matched with Licensed Altadena Contractors Tell us about your roof replacement and we'll line up two or three licensed builders who work in the area. Los Angeles County overview [See Roof Replacement costs across all LA County cities →](https://keystoneconnect.us/cost/los-angeles-county/roof-replacement) Before you sign a bid [See a real roof replacement bid torn down line by line →](https://keystoneconnect.us/estimate-teardowns/roof-replacement) ## Related Altadena Projects [All projects← Back to Altadena](https://keystoneconnect.us/cities/altadena)[AltadenaKitchen Remodel Cost →](https://keystoneconnect.us/cities/altadena/kitchen-remodel)[AltadenaBathroom Remodel Cost →](https://keystoneconnect.us/cities/altadena/bathroom-remodel)[AltadenaADU Construction Cost →](https://keystoneconnect.us/cities/altadena/adu) ## Roof Replacement in Nearby Cities [Burbank, CARoof Replacement Cost in Burbank →](https://keystoneconnect.us/cities/burbank/roof-replacement)[Glendale, CARoof Replacement Cost in Glendale →](https://keystoneconnect.us/cities/glendale/roof-replacement)[Pasadena, CARoof Replacement Cost in Pasadena →](https://keystoneconnect.us/cities/pasadena/roof-replacement)