Cost to Replace a Roof in San Jose (2026 Guide)

The single most common question we get at California First Roofing is: what does a new roof cost in San Jose? The honest answer is that it depends on five variables — material, square footage, decking condition, access, and warranty tier. Below is a transparent 2026 breakdown of what San Jose homeowners are actually paying, based on hundreds of projects we've completed across Los Gatos, Saratoga, Palo Alto, Sunnyvale, Cupertino, and every other neighborhood in Santa Clara County.

Average cost by material (installed, 2026)

• Architectural asphalt shingle: $9–$14 per sq ft — the workhorse of San Jose residential roofing. A typical 2,400 sq ft home runs $22,000–$34,000.
• Concrete tile (Boral, Eagle, MCA): $15–$25 per sq ft — the signature roof of Spanish Colonial and Mediterranean homes. $36,000–$60,000 for a typical home.
• Authentic clay tile: $20–$40 per sq ft — hand-formed Mission-style tile. $48,000–$96,000 for estate homes.
• Standing-seam metal (24-gauge Kynar): $18–$30 per sq ft — 50+ year lifespan, Class-A fire rated.
• Natural slate: $30–$60 per sq ft — heirloom-quality, 75+ year lifespan.
• TPO / PVC single-ply (commercial flat): $8–$14 per sq ft installed.
• Lift & relay tile: 50–65% of full replacement — reuse existing tile with new underlayment.

What drives the number up (or down)

Decking condition is the biggest variable. If your existing plywood or 1x6 skip sheathing is dry-rotted, cracked, or spaced beyond current code, we replace it — typically $2–$4 per sq ft. On older Almaden Valley and Downtown homes we often replace 15–30% of the decking; on newer homes it's under 5%.

Access and pitch matter more than most homeowners realize. Steep pitches (over 7:12) and multi-story homes require additional safety scaffolding, longer install times, and higher labor rates. A single-story ranch in Cambrian costs materially less per square foot than a three-story hillside home in Los Gatos.

Warranty tier is the last variable. A standard 10-year workmanship warranty from a lesser contractor is a different product than a 50-year GAF Golden Pledge or Owens Corning Preferred warranty from a factory-certified installer.

Hidden costs to watch for

Cheap bids in San Jose almost always omit: proper synthetic underlayment (only felt paper), stainless flashing at valleys and walls (only galvanized), ice-and-water shield at eaves, ridge and eave venting to code, or dumpster and cleanup fees. Get every line item in writing.

How to get a real number for your home

Every California First Roofing estimate includes a drone survey, roof measurement report, moisture reading, decking assessment, and a fixed-price line-item proposal — free and no obligation. Call us at (424) 777-1619 or email sales@californiafirstroofing.com to schedule.