Local research · updated July 2026
Bay & bow windows in Manchester, New Hampshire
Multi-unit assemblies that project outward — bay (3 units, angled) or bow (4–6 units, curved). For Manchester's older housing stock (66.2% of homes predate 1980), bay & bow window replacement is a common project — and in the ENERGY STAR Northern zone, the number that matters most is a low U-factor (≤ 0.22) to keep heat in.
Short answer
Bay & bow windows in Manchester typically cost $2,960–$9,465+ installed per opening. The low end is a mid-grade vinyl insert from a regional installer; the top is a premium frame, a full-frame installation, or a full-service national brand.
Market bands + BLS PPI, localized to Manchester (BEA Regional Price Parity, 2024). How we estimate →
$2,960–$9,465+
installed range per opening for Bay & bow window, from a mid-grade insert up to a premium or full-frame job
Source: Market bands + BLS PPI, localized to Manchester
66.2%
of Manchester homes were built before 1980
Source: U.S. Census Bureau, 2019–2023 ACS 5-Year Estimates
U ≤ 0.22
the ENERGY STAR v7.0 number that matters most in the Northern zone
Source: EPA ENERGY STAR v7.0
Is a Bay & bow window right for a Manchester home?
Fixed center with operable flankers (bay) or a curved run of units (bow).
Where it fits:
- Adding interior space, light, and a seat or shelf
- Street-facing façade upgrades
What to weigh:
- A structural project, not a swap — support, roofing, and insulation of the projection drive cost
- Highest cost band of common window projects
Bay & bow windows and Manchester's climate
Manchester sits in the ENERGY STAR Northern zone (IECC zone 5A (cool, moist), Hillsborough County), where the priority is a low U-factor (≤ 0.22) to keep heat in.
Because a bay or bow projects beyond the wall, its roof and floor are a thermal weak point — insulating that projection well matters as much as the glass for Northern-zone comfort.
New to these numbers? See our plain-English guide to U-factor and SHGC and the full bay & bow guide.
What Bay & bow windows cost in Manchester
Bay & bow window replacement in Manchester runs $2,960–$9,465+ installed. The low end is a mid-grade vinyl insert from a regional installer; the top is a premium frame, a full-frame installation, or a full-service national brand. Southern NH pricing sits below Boston but reflects New England labor and old-housing complexity. Full-frame work and lead-safe containment add cost. Federal 25C is gone; NHSaves assessments and weatherization are the live utility path, while state IRA HOMES/HEAR were still launching as of mid-2026. New Hampshire's lack of sales tax can lower out-of-pocket materials cost relative to neighboring states — confirm with your contractor's quote, not as a substitute for efficiency incentives.
That's the national range shifted to Manchester's cost level using the BEA Regional Price Parity for Manchester-Nashua, NH (105.7, U.S. = 100; 2024). How we estimate local costs →
For a breakdown by frame material and install type, see our full cost guide.
Installers serving Manchester
A sample of companies with locations in the Manchester market. See the full Manchester directory for all listings, our map, and featured-partner disclosures.
| Company | Location | Request a quote |
|---|---|---|
 4.8 · 200,000+ reviews | Northborough, MA | Get a quote → |
| 1Pella Windows & DoorsPella | Rochester, NH | Get matched → |
| 2Pella Windows and Doors Showroom of Bedford, NHPella | Bedford, NH | Get matched → |
| 3Pella Windows and Doors Showroom of New London, NHPella | New London, NH | Get matched → |
| 4Pella Windows and Doors Showroom of Newington, NHPella | Newington, NH | Get matched → |
| 5Pella Windows and Doors Showroom of Woburn, MAPella | Woburn, MA | Get matched → |
Renewal by Andersen of Boston
4.8 · 200,000+ reviewsNorthborough, MA showroom · serving the Manchester metro
Full-service manufacturer and installer, transferable warranty, local crews. Why it's our Top Pick
Get a quote →Listings compiled from manufacturer dealer locators and public business records. Premier and Sponsored Partners pay for placement and are labeled as such; star ratings shown are reported by the partner, with the source and date beside them. See our advertising disclosure. Contacting a company shares your details with it (or a vetted local installer) so it can reach you about your project.
Are you a window company? Claim your listing to take quote requests from Manchester homeowners directly.
Rebates & incentives in New Hampshire
The federal window tax credit (25C) ended for projects placed in service after December 31, 2025. If your windows were installed in 2025, you can still claim it on your 2025 return — but for new projects there is no federal window credit. State and utility programs are now the main source of window incentives.
New Hampshire's IRA Home Energy Rebates are administered by the New Hampshire Department of Energy. As of mid-2026 the Home Electrification and Appliance Rebates (HEAR) track was expected to launch mid-summer 2026 (not yet open to projects started before official launch), and the Home Efficiency Rebates (HOMES / HER) whole-home track was still awaiting federal funding and guidance — so neither path was a dependable consumer rebate for windows yet. Windows would generally fit only inside a whole-home modeled-savings project when HOMES opens. Confirm current status at energy.nh.gov before promising rebate money. See our Manchester guide for the full program list.
Bay & bow windows in Manchester: FAQ
›What efficiency numbers should a Bay & bow window in Manchester meet?
Manchester sits in the ENERGY STAR Northern zone (IECC 5A (cool, moist)). Qualifying units need a U-factor of 0.22 or lower with an SHGC of at least 0.17. Because a bay or bow projects beyond the wall, its roof and floor are a thermal weak point — insulating that projection well matters as much as the glass for Northern-zone comfort.
›How much does Bay & bow window replacement cost in Manchester?
A useful planning range for Bay & bow window replacement in Manchester is $2,960–$9,465+ installed. The low end is a mid-grade vinyl insert from a regional installer; the top is a premium frame, a full-frame installation, or a full-service national brand. Southern NH pricing sits below Boston but reflects New England labor and old-housing complexity. Full-frame work and lead-safe containment add cost. Federal 25C is gone; NHSaves assessments and weatherization are the live utility path, while state IRA HOMES/HEAR were still launching as of mid-2026. New Hampshire's lack of sales tax can lower out-of-pocket materials cost relative to neighboring states — confirm with your contractor's quote, not as a substitute for efficiency incentives.
›Do I need a permit to replace Bay & bow windows in Manchester?
Replacement generally requires a permit, and new units must meet the current energy code. See our Manchester guide for local permitting and rebate details, and always confirm your installer pulls the permit.
Sources
- — U.S. Census Bureau, American Community Survey 5-Year Estimates (B25034, B25035)
- — EPA ENERGY STAR Version 7.0 Residential Windows specification
- — DOE/PNNL IECC climate zone assignments by county
- — NREL residential window cost analysis (planning ranges)