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What will a new roof cost for a house my size in the South Bay?

Short answerSize sets the starting point, but no honest page can price your roof from square footage. Use the estimator below to turn your home's size and pitch into roofing squares and see which cost factors apply in the South Bay. Most full replacements are five-figure jobs; a free written estimate gives your exact price.

Every roofer we work with is licensed, insured and highly reviewed by Bay Area homeowners.

Updated · Sources reviewed November 12, 2026 · By South Bay Roof Replacement

  • Active C-39 roofing license, checked on CSLB
  • Contractor's bond and workers' comp on file
  • Tear-off, permit and warranty paperwork handled
  • Free written estimate, no obligation

How does the estimator work?

A roofing square is 100 square feet. To estimate yours, take the area each floor covers (living area divided by stories), add a garage if it shares the roof, and scale up for slope, because pitched surfaces are longer than the floor below them. Eaves and overhangs add roughly another 5% to 20%. The roofer's measurement replaces all of this.

Roof size and cost-factor estimator

Which of these apply? (each one tends to push the price up)

What do typical the South Bay homes come to?

These examples use the same geometry. They describe roof area only, not price.

Example home Footprint under the roof Pitch Roofing squares (approx.)
San Jose or Sunnyvale ranch, 1,500 sq ft, one story about 1,900 sq ft 4-in-12 pitch 21 to 24
Eichler, 1,800 sq ft, one story about 2,200 sq ft flat or nearly flat 23 to 26
Cupertino or Evergreen two-story, 2,800 sq ft about 1,800 sq ft 6-in-12 pitch 21 to 24

What makes a roof in the South Bay cost more than its size suggests?

Santa Clara County is mostly 1960s and 70s single-story tracts, which means wide, low-pitch roofs over large footprints. Eichlers add flat roofs with foam or membrane systems and little attic space. Tile shows up in many newer subdivisions, where the work is often new underlayment with the tiles relaid. Every city we checked is in climate zone 4, so a qualifying reroof needs a rated cool-roof product, and many roofs carry solar that has to come off first.

What price range should I expect?

A broad frame is all a published source supports: the Cost vs. Value report places a typical full asphalt reroof in the tens of thousands of dollars and metal noticeably higher. Two homes with the same square count can still be priced far apart. For your actual price, request a free written estimate: a licensed roofer measures the roof and prices your exact scope.

What should I have ready for an estimate?

  • Your home's approximate living area and number of stories
  • Roof age and any past reroof permits
  • Whether there are solar panels, skylights or a chimney
  • Photos of leaks or damaged areas, if any

Related: what drives roof replacement cost, metal roofs, dry rot and decking, solar removal and reinstall and our quote checker.

Every roofer we work with is licensed, insured and highly reviewed by Bay Area homeowners.

Get a free replacement quote

Frequently asked questions

What is a roofing square?

100 square feet of roof surface. Roofers measure and price in squares; the number depends on footprint and pitch, not just living area.

Why won't you give a dollar range per home size?

Because two roofs of the same size can differ by many thousands of dollars. A written estimate after an inspection is the reliable number, and it's free.

Does an Eichler roof cost more than a shingle tract roof?

Often, because flat-roof systems need membranes or foam, insulation decisions and drainage work. Get it priced as its own scope.

Related questions

Sources

Sources reviewed November 12, 2026. Figures are published estimates and official fees, not quotes. Confirm prices, permits and requirements with your contractor and building department. This page is general information, not legal or insurance advice.