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How much does a roof replacement cost in Alamo, CA?

Regionally adjustedUpdated Prices checked October 20262 sources

In Alamo, a roof replacement typically runs $8,560 to $15,990, about $11,420 for a typical job. That is the US national range from Fixr ($7,500 to $14,000) adjusted by the Pacific factor of 1.14 from the 2025 Cost vs. Value Report. Checked October 2026.

Adjusted for the Pacific region

Low
$8,560
Typical
$11,420
High
$15,990

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Roof replacement cost in Alamo, CA

Each row says exactly what the figures are and where they come from.

Roof replacement cost in Alamo, CA
EstimateLowTypicalHighBasisChecked
Pacific estimate$8,560$11,420$15,990National range × 1.14: the Pacific / national cost ratio for “Roofing Replacement | Asphalt Shingles” ($36,391 vs $31,871) in the 2025 Cost vs. Value ReportOctober 2026
US national range$7,500$10,000$14,000Per project: asphalt shingles on a 1,700 sq ft home (about 2,000 sq ft of roof) (Fixr)October 2026

Roof replacement cost by type or size

US national figures in USD, as published by each source.

Roof replacement cost by type or size
Type or sizePrice (USD)Source
Slate roof$20,000 to $60,000Fixr
Copper roof$30,000 to $60,000Fixr

What drives the cost of a roof replacement

  1. Roof size

    Contractors price by the square foot, about $3.75 to $11 and $4.75 on average.

  2. Material

    Asphalt shingles average about $10,000; slate and copper run $20,000 to $60,000.

  3. Pitch and shape

    Hips, valleys, dormers and steep pitches add labor; a steep pitch can add $1,000 to $3,000.

  4. Tear-off and disposal

    Removal averages about $50 per square (100 sq ft), up to $150 for heavy materials.

  5. Decking repairs

    Rotten or damaged decking found during tear-off costs $2 to $8 per sq ft to replace.

  6. Local labor and code

    Labor is roughly 40% to 60% of the total; fire-, wind- or impact-rated codes can add more.

Permits and what's included in Alamo

Permit note

Re-roofing usually needs a building permit. Permits typically cost $100 to $500, and strict fire-, wind- or impact-resistance codes can add more in some areas.

Rules are set locally; confirm with Alamo’s building department.

What’s usually included

  • Removal of the old roof
  • Underlayment and standard roofing felt
  • Installation of the new roof covering
  • Manufacturer and workmanship warranties (terms vary by contractor)

Scopes vary. Get the scope in writing on every quote.

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Top-ranked roofers in Alamo

The top 3 of 772 roofers we rank for Alamo, CA, by CR Score. Paid placement never changes rank.

  1. #1
    Roof Doctors Contra Costa County
    CR Score 644.8from 188 Google reviews
  2. #2
    Bay Area Pressure Pros
    CR Score 615.0from 80 Google reviews
  3. #3
    Roof Doctors Alameda County
    CR Score 615.0from 87 Google reviews

See all ranked roofers in Alamo

How to check a roofer's license in California

In California, Contractors State License Board (CSLB) licenses C-39 Roofing contractor license.

Jobs of $1,000 or more in labor and materials (from January 1, 2025).

  1. Search the business name or license number on the Contractors State License Board (CSLB) license lookup.
  2. Check that the status is active and the name matches the contract or truck.
  3. Ask for proof of insurance before work starts.

No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.

Guide checked October 2026. How we verify licenses

Roof replacement cost in Alamo: questions

How much does a roof replacement cost in Alamo, CA?

In Alamo, a roof replacement typically runs $8,560 to $15,990, about $11,420 for a typical job. That is the US national range from Fixr ($7,500 to $14,000) adjusted by the Pacific factor of 1.14 from the 2025 Cost vs. Value Report. Checked October 2026.

Why is the Alamo price different from the national price?

The 2025 Cost vs. Value Report puts the “Roofing Replacement | Asphalt Shingles” project at $36,391 in the Pacific division against $31,871 nationally, a factor of 1.14. We apply that factor to the national range. It is a division-level adjustment, not a Alamo price survey.

Do I need a permit for a roof replacement in Alamo?

Re-roofing usually needs a building permit. Permits typically cost $100 to $500, and strict fire-, wind- or impact-resistance codes can add more in some areas. Rules are set locally, so confirm with Alamo’s building department.

What affects the cost of a roof replacement?

Roof size: contractors price by the square foot, about $3.75 to $11 and $4.75 on average. Material: asphalt shingles average about $10,000; slate and copper run $20,000 to $60,000. Pitch and shape: hips, valleys, dormers and steep pitches add labor; a steep pitch can add $1,000 to $3,000. Tear-off and disposal: removal averages about $50 per square (100 sq ft), up to $150 for heavy materials.

How many roofers serve Alamo?

We rank 772 roofers for Alamo, CA by CR Score. Get at least three written quotes for the same scope.

What is usually included in the price?

Removal of the old roof; Underlayment and standard roofing felt; Installation of the new roof covering; Manufacturer and workmanship warranties (terms vary by contractor). Always get the scope in writing on the quote.

Sources

Checked October 2026. Figures are estimates, not quotes.

  1. Fixr: Roof replacement cost · page updated February 4, 2026 · checked October 2026Primary source. Used for: Low, typical and high; basis; drivers; permit.
  2. HomeAdvisor: Roof replacement cost · page updated June 17, 2026 · checked October 2026Used for: Cross-check: normal range $5,903 to $13,378, average $9,609 (customer-reported projects); pitch driver.
  3. Journal of Light Construction: 2025 Cost vs. Value Report, Pacific division · checked October 2026Used for: Regional factor 1.14 for “Roofing Replacement | Asphalt Shingles”.
These are published estimates with a documented regional adjustment, checked October 2026. They are not quotes. Typical range shown: $8,560 to $15,990. Editorial policy

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