Local research · updated July 2026
Bay & bow windows in Ann Arbor, Michigan
Multi-unit assemblies that project outward — bay (3 units, angled) or bow (4–6 units, curved). For Ann Arbor's older housing stock (64.3% 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 Ann Arbor typically cost $2,825–$9,035+ 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 Ann Arbor (BEA Regional Price Parity, 2024). How we estimate →
$2,825–$9,035+
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 Ann Arbor
64.3%
of Ann Arbor 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 Ann Arbor 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 Ann Arbor's climate
Ann Arbor sits in the ENERGY STAR Northern zone (IECC zone 5A (cool, moist), Washtenaw 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 Ann Arbor
Bay & bow window replacement in Ann Arbor runs $2,825–$9,035+ 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. Ann Arbor pricing often runs above Flint or Lansing averages because of labor demand and higher-spec product choices, but old openings still create bid spreads (full-frame vs insert, lead-safe work). Federal 25C is gone; utility efficiency programs are the realistic incentive path. Itemize every bid.
That's the national range shifted to Ann Arbor's cost level using the BEA Regional Price Parity for Ann Arbor, MI (100.9, 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 Ann Arbor
A sample of companies with locations in the Ann Arbor market. See the full Ann Arbor directory for all listings, our map, and featured-partner disclosures.
| Company | Location | Request a quote |
|---|---|---|
 4.8 · 200,000+ reviews | Wixom, MI | Get a quote → |
| 1Pella Windows and Doors Showroom of Auburn Hills, MIPella | Auburn Hills, MI | Get matched → |
| 2Pella Windows and Doors Showroom of Plymouth, MIPella | Plymouth, MI | Get matched → |
| 3Power Home RemodelingPower Home Remodeling | Novi, MI | Get matched → |
| 4Window NationWindow Nation | Wixom, MI | Get matched → |
Renewal by Andersen of Detroit
4.8 · 200,000+ reviewsWixom, MI showroom · serving the Ann Arbor 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 Ann Arbor homeowners directly.
Rebates & incentives in Michigan
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.
Michigan runs IRA Home Energy Rebate programs (administered through the state energy office); whole-home efficiency retrofits can include windows. Confirm current status and funding availability first. See our Ann Arbor guide for the full program list.
Bay & bow windows in Ann Arbor: FAQ
›What efficiency numbers should a Bay & bow window in Ann Arbor meet?
Ann Arbor 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 Ann Arbor?
A useful planning range for Bay & bow window replacement in Ann Arbor is $2,825–$9,035+ 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. Ann Arbor pricing often runs above Flint or Lansing averages because of labor demand and higher-spec product choices, but old openings still create bid spreads (full-frame vs insert, lead-safe work). Federal 25C is gone; utility efficiency programs are the realistic incentive path. Itemize every bid.
›Do I need a permit to replace Bay & bow windows in Ann Arbor?
Replacement generally requires a permit, and new units must meet the current energy code. See our Ann Arbor 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)