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Local research · updated July 2026

Bay & bow windows in Kennewick, Washington

Multi-unit assemblies that project outward — bay (3 units, angled) or bow (4–6 units, curved). For Kennewick's mixed-age housing stock (50.2% 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 Kennewick typically cost $2,805–$8,965+ 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 Kennewick (BEA Regional Price Parity, 2024). How we estimate →

$2,805–$8,965+

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 Kennewick

50.2%

of Kennewick 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 Kennewick 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 Kennewick's climate

Kennewick sits in the ENERGY STAR Northern zone (IECC zone 5B (cold, dry), Benton 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 Kennewick

Bay & bow window replacement in Kennewick runs $2,805–$8,965+ 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. Tri-Cities pricing is generally below Seattle metro. Hot-climate glass packages and wind-rated installs drive material choices; sound openings often take inserts. Federal 25C is gone; check local utility efficiency offers and Washington state energy programs. Itemize NFRC numbers and permit.

That's the national range shifted to Kennewick's cost level using the BEA Regional Price Parity for Kennewick-Richland, WA (100.1, 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 Kennewick

A sample of companies with locations in the Kennewick market. See the full Kennewick directory for all listings, our map, and featured-partner disclosures.

✓ Top PickPremier Partner

Renewal by Andersen Tri-Cities

Renewal by Andersen4.8 · 200,000+ reviews

Kennewick, WA showroom · serving the Kennewick metro

Full-service manufacturer and installer, transferable warranty, local crews. Why it's our Top Pick

Get a quote →

1Pella Windows and Doors Showroom of Richland, WA - By Appointment Only

Richland, WA · Pella

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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 Kennewick homeowners directly.

Rebates & incentives in Washington

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.

Washington runs IRA Home Energy Rebate programs; whole-home efficiency retrofits can include windows. Confirm current status and funding availability before promising rebate money. See our Kennewick guide for the full program list.

Bay & bow windows in Kennewick: FAQ

›What efficiency numbers should a Bay & bow window in Kennewick meet?

Kennewick sits in the ENERGY STAR Northern zone (IECC 5B (cold, dry)). 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 Kennewick?

A useful planning range for Bay & bow window replacement in Kennewick is $2,805–$8,965+ 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. Tri-Cities pricing is generally below Seattle metro. Hot-climate glass packages and wind-rated installs drive material choices; sound openings often take inserts. Federal 25C is gone; check local utility efficiency offers and Washington state energy programs. Itemize NFRC numbers and permit.

›Do I need a permit to replace Bay & bow windows in Kennewick?

Replacement generally requires a permit, and new units must meet the current energy code. See our Kennewick 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)