Table of Contents
Introduction
In this article, I’ll give you the typical costs for installing a new roof in New Hampshire in 2025, for both residential and commercial buildings. I’ve spent years reviewing contractor bids and researching roofing costs for my clients around the country. The roof cost estimates I provide here were produced by analyzing current material prices, New Hampshire labor costs, and other relevant factors, including roofing project values from actual New Hampshire building permit data. The roof systems covered here include asphalt shingles, metal roofing, slate, tile, synthetic composite, cedar shakes and shingles, and all of the common types of low-slope commercial roofing.
Roof replacement costs in New Hampshire tend to run slightly below the national average, with prices typically varying between rural northern counties and the more urbanized southern region near Boston’s commuter belt. (Compare with national average roof replacement costs.)
Actual roof prices will vary depending on location, roof size, roof slope, complexity, and, of course, the type of roof system installed. Asphalt shingles are by far the most common residential roof covering in New Hampshire, but alternatives like standing seam metal, natural slate, synthetic composite, and cedar shakes are also relatively popular. Commercial “flat” (low-slope) roofs typically use single-ply membranes (EPDM, TPO, and PVC), modified bitumen, or spray-applied polyurethane foam roofing systems.
On average, New Hampshire residential roof replacement prices in 2025 typically range from around $5.50 per square foot for basic asphalt shingles to around $32 per square foot for high-end copper roofing. This means a typical 1,700-square-foot pitched roof may cost between about $9,000 and $55,000, depending on the material chosen.
Commercial roofing typically costs more than many people expect, due to insulation requirements. Board insulation is normally installed as a part of a low-slope roof system, and costs around $1 to $1.50 per square foot (installed) per inch of thickness while providing an R-value of around R-4 to R-6 per inch.
Commercial roof replacement prices in New Hampshire range, on average, from around $4.50 per square foot for a ballasted EPDM overlay system with no insulation included to around $16 per square foot for a 2-ply modified bitumen roof with enough insulation to satisfy the New Hampshire R-30 energy code requirement for roofs with above-deck insulation.
The tables below provide cost information for all roof types and systems.
Climate Considerations for New Hampshire Roofs
New Hampshire has a humid continental climate, with cold, snowy winters and warm, humid summers. The northern and mountainous regions can experience long winters with heavy snow accumulation, while southern areas are somewhat milder but still see regular snow and ice. Average annual precipitation is relatively high statewide, about 40 to 50 inches, with significant snowfall in the White Mountains and northern counties. Severe weather risks include heavy snow loads, ice storms, strong winds, and occasional hail or summer thunderstorms. Because of all the snow, roofs in New Hampshire are often built with steeper than average pitches to shed snow, which can make the roofs harder to work on. This increases replacement costs a bit.
Heating degree days far exceed cooling degree days across New Hampshire, making winter performance and energy efficiency the main priorities. Reflective white “cool” roofing is not particularly beneficial in this climate, and darker roofing materials may even provide a small benefit by absorbing winter solar heat instead of reflecting it away. Algae growth (Gloeocapsa magma) can be an issue for asphalt shingle roofs in New Hampshire, especially on shaded roof areas or on northern exposures. Black or dark gray shingles can help hide the dark algae stains better than lighter colors.
Given these conditions, homeowners and property managers in New Hampshire should consider the following:
- Asphalt shingles are the most common and affordable residential roofing material. Algae-resistant shingles are useful, and impact-resistant shingles may be a smart choice in areas prone to hail.
- Ventilation and underlayment are critical. Proper attic ventilation helps reduce condensation, minimize ice dam formation, and extend the life of the roof. Correct installation of ice and water shield underlayment along eaves and valleys is especially important in snowy and icy regions. Note that improper roof/attic ventilation can void your roof warranty.
- Metal roofing is an excellent material throughout the state. Standing seam metal roofs shed snow efficiently, resist wind, and provide long-term durability. PVDF-coated steel or aluminum panels also offer strong resistance to color fading and corrosion.
- Slate, tile, and cedar roofing perform well when properly installed. Cedar should be used only as part of a Class A fire-rated system. Copper or zinc strips may help reduce moss and algae growth in damp, shaded areas.
- Insulation and air sealing help reduce heating costs and prevent ice dam problems. A well-insulated attic and proper air sealing can lower energy demand in winter and improve overall roof system performance.
Things to Keep in Mind
These roof cost estimates should be fairly accurate; I make an effort to update them regularly using current material prices and labor data specific to New Hampshire. Keep in mind that the costs listed below are averages, and actual costs can vary significantly depending on your specific location and the size, configuration, accessibility, and condition of your particular roof.
The residential roof cost estimates provided here are for roof replacements on roofs with a 6/12 pitch and include all standard roof components (underlayment, ice & water shield, batten systems, fasteners, flashing, etc.). Steeper roofs or roofs with complex designs can increase costs by as much as 30%.
Removal of an existing commercial or residential roof typically adds between $1 and $3 per square foot. For the estimates in the tables below, $1.50 per square foot for tear-off and disposal has been included in all pricing except for the “no additional insulation” commercial roof pricing, which generally indicates a roof recover project.
Table 1: Residential Roof Costs in New Hampshire
| Average Cost of a Residential Pitched Roof in New Hampshire | |||
|---|---|---|---|
| Roof Type | Average Installed Cost Per Square Foot |
Average Installed Cost Per Square (100 sq. ft.) |
Average Installed Cost Typical Residential Roof (1,700 sq. ft.) |
| Asphalt Shingles 3-Tab or Strip Shingles |
$5.20 | $520 | $8,840 |
| Asphalt Shingles Architectural or Dimensional Shingles |
$5.70 | $570 | $9,690 |
| Asphalt Shingles Luxury or Premium Shingles |
$7.10 | $710 | $12,070 |
| Cedar Shake & Shingle Red Cedar Shingles |
$13.00 | $1,300 | $22,100 |
| Cedar Shake & Shingle Red Cedar Shingles Class A Fire Rated System |
$14.55 | $1,455 | $24,735 |
| Cedar Shake & Shingle Red Cedar Shakes |
$12.50 | $1,250 | $21,250 |
| Cedar Shake & Shingle Red Cedar Shakes Class A Fire Rated System |
$14.10 | $1,410 | $23,970 |
| Metal Roofing Exposed Fastener Panels (Aluminum, Basic Coating) |
$10.25 | $1,025 | $17,425 |
| Metal Roofing Exposed Fastener Panels (Steel, Basic Coating) |
$7.65 | $765 | $13,005 |
| Metal Roofing Exposed Fastener Panels (Steel, PVDF/Kynar Coated) |
$9.55 | $955 | $16,235 |
| Metal Roofing Metal Shingles (Aluminum, Basic Coating) |
$13.00 | $1,300 | $22,100 |
| Metal Roofing Metal Shingles (Steel, Basic Coating) |
$9.75 | $975 | $16,575 |
| Metal Roofing Metal Shingles (Steel, PVDF/Kynar Coated) |
$12.20 | $1,220 | $20,740 |
| Metal Roofing Standing Seam Metal (Aluminum, Basic Coating) |
$15.80 | $1,580 | $26,860 |
| Metal Roofing Standing Seam Metal (Steel, Basic Coating) |
$11.85 | $1,185 | $20,145 |
| Metal Roofing Standing Seam Metal (Steel, PVDF/Kynar Coated) |
$14.80 | $1,480 | $25,160 |
| Metal Roofing Standing Seam Metal (Copper) |
$31.60 | $3,160 | $53,720 |
| Metal Roofing Standing Seam Metal (Zinc) |
$21.40 | $2,140 | $36,380 |
| Metal Roofing Flat Seam Metal (Copper, Soldered Seams) |
$37.20 | $3,720 | $63,240 |
| Slate Roofing Hard Natural Slate (Grade S1) “Standard” 1/4″ Thick |
$22.40 | $2,240 | $38,080 |
| Slate Roofing Hard Natural Slate (Grade S1) “Rough Texture” 1/4″ to 3/8″ Thick |
$24.90 | $2,490 | $42,330 |
| Slate Roofing Hard Natural Slate (Grade S1) “Architectural” 3/8″ to 1/2″ Thick |
$29.05 | $2,905 | $49,385 |
| Synthetic Composite Synthetic Composite Shingles (Engineered Polymeric Tile) |
$11.70 | $1,170 | $19,890 |
| Tile Roofing Clay Tile Flat Profile (Shingle Style) |
$14.30 | $1,430 | $24,310 |
| Tile Roofing Clay Tile Mission (2 Piece) |
$15.15 | $1,515 | $25,755 |
| Tile Roofing Clay Tile S-Profile (1 Piece) |
$13.65 | $1,365 | $23,205 |
| Tile Roofing Clay Tile Premium Styles |
$17.20 | $1,720 | $29,240 |
| Tile Roofing Concrete Tile Flat Profile (Shingle Style) |
$10.85 | $1,085 | $18,445 |
| Tile Roofing Concrete Tile S-Profile (1 Piece) |
$10.40 | $1,040 | $17,680 |
| Tile Roofing Concrete Tile Premium Styles |
$13.00 | $1,300 | $22,100 |
| Tile Roofing Lightweight Concrete Flat Tile (Shingle Style) |
$11.35 | $1,135 | $19,295 |
Table 2: Commercial Roof Costs in New Hampshire
For energy code purposes, New Hampshire is divided between IECC Climate Zones 5 and 6. In both zones, commercial low-slope roofs with insulation installed entirely above the deck must meet a minimum of R-30 continuous insulation (R-30ci). These requirements are set by the New Hampshire State Building Code, which is based on the International Energy Conservation Code (IECC), with state-specific amendments.
While R-30ci is the minimum requirement, building owners may benefit from exceeding this amount of insulation in order to reduce heating demand during New Hampshire’s long, cold winters.
Always verify current R-value requirements with your local code authority, as energy codes are periodically updated.
When performing a roof recover (installing a new roof membrane over an existing one), these insulation requirements generally do not apply. Roof recover projects usually involve adding a layer of cover board over the existing roof system to provide a suitable substrate, followed by the new roof membrane. Keep in mind that roof recovery is not always permitted or advisable.
| Average Cost of a Commercial Low-Slope Roof in New Hampshire | |||
|---|---|---|---|
| Roof Type | Average Installed Cost Per Square Foot |
Average Installed Cost Per Square (100 sq. ft.) |
Average Installed Cost Typical Commercial Roof (25,000 sq. ft.) |
| EPDM Roofing Ballasted EPDM 45-mil Membrane With R-30 Insulation | $10.00 | $1,000 | $250,000 |
| EPDM Roofing Ballasted EPDM 60-mil Membrane With R-30 Insulation | $10.40 | $1,040 | $260,000 |
| EPDM Roofing Ballasted EPDM 60-mil Membrane No Additional Insulation | $4.50 | $450 | $112,500 |
| EPDM Roofing Ballasted EPDM 90-mil Membrane With R-30 Insulation | $10.75 | $1,075 | $268,750 |
| EPDM Roofing Mechanically-Attached EPDM 45-mil Membrane With R-30 Insulation | $12.90 | $1,290 | $322,500 |
| EPDM Roofing Mechanically-Attached EPDM 60-mil Membrane With R-30 Insulation | $13.30 | $1,330 | $332,500 |
| EPDM Roofing Mechanically-Attached EPDM 60-mil Membrane No Additional Insulation | $5.00 | $500 | $125,000 |
| EPDM Roofing Mechanically-Attached EPDM 75-mil Membrane With R-30 Insulation | $13.60 | $1,360 | $340,000 |
| EPDM Roofing Fully-Adhered EPDM 45-mil Membrane With R-30 Insulation | $13.10 | $1,310 | $327,500 |
| EPDM Roofing Fully-Adhered EPDM 60-mil Membrane With R-30 Insulation | $13.55 | $1,355 | $338,750 |
| EPDM Roofing Fully-Adhered EPDM 60-mil Membrane No Additional Insulation | $5.20 | $520 | $130,000 |
| EPDM Roofing Fully-Adhered EPDM 90-mil Membrane With R-30 Insulation | $13.90 | $1,390 | $347,500 |
| Metal Roofing Exposed Fastener Panels (Aluminum, Basic Coating) | $10.25 | $1,025 | $256,250 |
| Metal Roofing Exposed Fastener Panels (Aluminum, PVDF/Kynar Coated) | $12.80 | $1,280 | $320,000 |
| Metal Roofing Exposed Fastener Panels (Steel, Basic Coating) | $7.65 | $765 | $191,250 |
| Metal Roofing Exposed Fastener Panels (Steel, PVDF/Kynar Coated) | $9.55 | $955 | $238,750 |
| Metal Roofing Standing Seam Metal (Aluminum, Basic Coating) | $15.80 | $1,580 | $395,000 |
| Metal Roofing Standing Seam Metal (Aluminum, PVDF/Kynar Coated) | $19.75 | $1,975 | $493,750 |
| Metal Roofing Standing Seam Metal (Steel, Basic Coating) | $11.85 | $1,185 | $296,250 |
| Metal Roofing Standing Seam Metal (Steel, PVDF/Kynar Coated) | $14.80 | $1,480 | $370,000 |
| Modified Bitumen Roofing APP-Modified Bitumen 2-Ply System With R-30 Insulation | $15.60 | $1,560 | $390,000 |
| Modified Bitumen Roofing APP-Modified Bitumen 2-Ply System No Additional Insulation | $8.50 | $850 | $212,500 |
| Modified Bitumen Roofing APP-Modified Bitumen 3-Ply System With R-30 Insulation | $18.15 | $1,815 | $453,750 |
| Modified Bitumen Roofing SBS-Modified Bitumen 2-Ply System With R-30 Insulation | $16.05 | $1,605 | $401,250 |
| Modified Bitumen Roofing SBS-Modified Bitumen 2-Ply System No Additional Insulation | $8.95 | $895 | $223,750 |
| Modified Bitumen Roofing SBS-Modified Bitumen 3-Ply System With R-30 Insulation | $18.85 | $1,885 | $471,250 |
| PVC Roofing Mechanically-Attached PVC 50-mil Membrane With R-30 Insulation | $13.35 | $1,335 | $333,750 |
| PVC Roofing Mechanically-Attached PVC 60-mil Membrane With R-30 Insulation | $13.75 | $1,375 | $343,750 |
| PVC Roofing Mechanically-Attached PVC 60-mil Membrane No Additional Insulation | $5.45 | $545 | $136,250 |
| PVC Roofing Mechanically-Attached PVC 80-mil Membrane With R-30 Insulation | $14.00 | $1,400 | $350,000 |
| PVC Roofing Fully-Adhered PVC 50-mil Membrane With R-30 Insulation | $13.60 | $1,360 | $340,000 |
| PVC Roofing Fully-Adhered PVC 60-mil Membrane With R-30 Insulation | $14.00 | $1,400 | $350,000 |
| PVC Roofing Fully-Adhered PVC 60-mil Membrane No Additional Insulation | $5.65 | $565 | $141,250 |
| PVC Roofing Fully-Adhered PVC 80-mil Membrane With R-30 Insulation | $14.35 | $1,435 | $358,750 |
| PVC KEE Roofing Mechanically-Attached PVC KEE 60-mil Membrane With R-30 Insulation | $14.90 | $1,490 | $372,500 |
| PVC KEE Roofing Fully-Adhered PVC KEE 60-mil Membrane With R-30 Insulation | $15.10 | $1,510 | $377,500 |
| PVC KEE Roofing Fully-Adhered PVC KEE 60-mil Membrane No Additional Insulation | $6.85 | $685 | $171,250 |
| PVC KEE Roofing Fully-Adhered PVC KEE 80-mil Membrane With R-30 Insulation | $15.50 | $1,550 | $387,500 |
| Spray Polyurethane Foam SPF 5-Inch Thick Silicone Coating Light Prep | $10.70 | $1,070 | $267,500 |
| Spray Polyurethane Foam SPF 5-Inch Thick Silicone Coating Heavy Prep | $12.35 | $1,235 | $308,750 |
| TPO Roofing Ballasted TPO 45-mil Membrane With R-30 Insulation | $9.70 | $970 | $242,500 |
| TPO Roofing Ballasted TPO 60-mil Membrane With R-30 Insulation | $10.10 | $1,010 | $252,500 |
| TPO Roofing Ballasted TPO 60-mil Membrane No Additional Insulation | $4.25 | $425 | $106,250 |
| TPO Roofing Ballasted TPO 80-mil Membrane With R-30 Insulation | $10.45 | $1,045 | $261,250 |
| TPO Roofing Mechanically-Attached TPO 45-mil Membrane With R-30 Insulation | $12.65 | $1,265 | $316,250 |
| TPO Roofing Mechanically-Attached TPO 60-mil Membrane With R-30 Insulation | $13.00 | $1,300 | $325,000 |
| TPO Roofing Mechanically-Attached TPO 60-mil Membrane No Additional Insulation | $4.75 | $475 | $118,750 |
| TPO Roofing Mechanically-Attached TPO 80-mil Membrane With R-30 Insulation | $13.35 | $1,335 | $333,750 |
| TPO Roofing Fully-Adhered TPO 45-mil Membrane With R-30 Insulation | $12.85 | $1,285 | $321,250 |
| TPO Roofing Fully-Adhered TPO 60-mil Membrane With R-30 Insulation | $13.30 | $1,330 | $332,500 |
| TPO Roofing Fully-Adhered TPO 60-mil Membrane No Additional Insulation | $5.00 | $500 | $125,000 |
| TPO Roofing Fully-Adhered TPO 80-mil Membrane With R-30 Insulation | $13.65 | $1,365 | $341,250 |
Further Reading: Roof Cost Details by Roofing Type
- Asphalt Shingle Roof Cost Guide
- Cedar Shake & Shingle Roof Cost Guide
- Copper Roof Cost Guide
- EPDM Rubber Roof Cost Guide
- Metal Roof Cost Guide
- Modified Bitumen Roof Cost Guide
- PVC Membrane Roof Cost Guide
- Shingle Roof Cost Guide
- Single-Ply Roofing Cost Guide (EPDM, PVC, TPO)
- Slate Roof Cost Guide
- Spray Polyurethane Foam Roofing Cost Guide
- Standing Seam Metal Roofing Cost Guide
- Tile Roof Cost Guide
- TPO Membrane Roof Cost Guide
About the Author
Jack Gray spent 20 years as a principal roof consultant with the Moriarty Corporation, an award-winning building enclosure consultant firm founded in 1967. Mr. Gray has worked in the roofing industry for over 25 years, with training and practical experience in roof installation, roof inspection, roof safety, roof condition assessment, construction estimating, roof design & specification, quality assurance, roof maintenance & repair, and roof asset management. He was awarded the Registered Roof Observer (RRO) professional credential in 2009. He also served as an infantry paratrooper in the 82nd Airborne Division and has a B.A. from Cornell University.