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How much does a roof replacement cost in Portsmouth, NH?

Regionally adjustedUpdated Prices checked October 20262 sources

In Portsmouth, a roof replacement typically runs $8,400 to $15,680, about $11,200 for a typical job. That is the US national range from Fixr ($7,500 to $14,000) adjusted by the New England factor of 1.12 from the 2025 Cost vs. Value Report. Checked October 2026.

Adjusted for the New England region

Low
$8,400
Typical
$11,200
High
$15,680

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Roof replacement cost in Portsmouth, NH

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

Roof replacement cost in Portsmouth, NH
EstimateLowTypicalHighBasisChecked
New England estimate$8,400$11,200$15,680National range × 1.12: the New England / national cost ratio for “Roofing Replacement | Asphalt Shingles” ($35,701 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 Portsmouth

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 Portsmouth’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 Portsmouth

The top 3 of 354 roofers we rank for Portsmouth, NH, by CR Score. Paid placement never changes rank.

  1. #1
    Compass Exteriors
    CR Score 625.0from 80 Google reviews
  2. #2
    A1 Restoration
    CR Score 615.0from 363 Google reviews
  3. #3
    KCM Construction
    CR Score 605.0from 110 Google reviews

See all ranked roofers in Portsmouth

Roof replacement cost in Portsmouth: questions

How much does a roof replacement cost in Portsmouth, NH?

In Portsmouth, a roof replacement typically runs $8,400 to $15,680, about $11,200 for a typical job. That is the US national range from Fixr ($7,500 to $14,000) adjusted by the New England factor of 1.12 from the 2025 Cost vs. Value Report. Checked October 2026.

Why is the Portsmouth price different from the national price?

The 2025 Cost vs. Value Report puts the “Roofing Replacement | Asphalt Shingles” project at $35,701 in the New England division against $31,871 nationally, a factor of 1.12. We apply that factor to the national range. It is a division-level adjustment, not a Portsmouth price survey.

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

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 Portsmouth’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 Portsmouth?

We rank 354 roofers for Portsmouth, NH 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, New England division · checked October 2026Used for: Regional factor 1.12 for “Roofing Replacement | Asphalt Shingles”.
These are published estimates with a documented regional adjustment, checked October 2026. They are not quotes. Typical range shown: $8,400 to $15,680. Editorial policy

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