Prices estimated using the NailThePrice Local Cost Model™ — national averages adjusted for St. Louis's labor rates, cost of living, and material pricing.
The cost to replace windows in St. Louis ranges from $290 to $1,150, with most homeowners paying around $620. Your actual cost depends on several factors specific to your home and the St. Louis market.
Single-hung windows are cheapest ($200–$400), double-hung cost $300–$600, and casement windows run $300–$700 per window installed.
Vinyl is cheapest and lowest maintenance, wood is warmest-looking but requires upkeep, and fiberglass is the most durable but most expensive.
Double-pane is standard ($200–$400/window). Triple-pane adds $100–$200 per window but provides significantly better insulation and noise reduction.
Standard sizes cost 30–50% less than custom. If your openings are non-standard, some manufacturers offer semi-custom sizing at moderate premiums.
ENERGY STAR-certified windows qualify for tax credits (up to $600/year) and can reduce energy bills by 12–33% compared to single-pane windows.
The Midwest has a strong pool of skilled tradespeople, and labor rates tend to be moderate compared to coastal cities. Union and non-union shops both compete, giving homeowners options on pricing.
Window replacement in St. Louis generally does not require a permit for standard installations. Check with your local building department if your project involves panel work or structural changes.
Energy-efficient windows with low-U values and triple-pane glass pay for themselves faster in cold climates. Proper insulation around frames is critical to prevent drafts and ice buildup.
Handy homeowners with basic tools can handle straightforward window replacement. If your project involves the panel, new circuits, or gas lines, hire a licensed pro. DIY can save $196–$252 in labor.
Compare prices from licensed, insured contractors in St. Louis.
Get Free Quotes from St. Louis Pros →The average cost to replace windows in St. Louis ranges from $290 to $1,150, with most homeowners paying around $620. This estimate includes both labor ($280) and materials ($340). Costs in St. Louis are near the national average due to local cost of living and labor market conditions. Get multiple quotes from licensed St. Louis contractors to lock in the best price.
St. Louis does not typically require a permit for standard window replacement. However, projects involving electrical panel work, structural changes, or gas line modifications may still require one. Check with St. Louis's building department to confirm before starting work.
Most window replacement projects in St. Louis take 1–1 day to complete. The timeline depends on project scope, contractor availability in the St. Louis metro area, and seasonal demand. Scheduling during St. Louis's off-peak season (typically fall and winter) can reduce wait times and may lower costs.
Replacing single-pane windows with ENERGY STAR double-pane windows saves $125–$465 per year on energy bills. Upgrading old double-pane windows to modern Low-E triple-pane saves 10–20%. The 30% federal energy efficiency tax credit (up to $600/year) helps offset the cost.
Replacing all windows at once is more cost-effective — you get volume pricing, one installation mobilization, and consistent appearance. However, if budget is tight, prioritize the worst-performing windows first: single-pane, north-facing, and those with failed seals (foggy between panes).