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§ Sheet LP / 06 · For St. Louis, MO window contractors

St. Louis, MO
WINDOWS ESTIMATING.

St. Louis window contractors: go from walkthrough to sendable bid in 8 minutes. Local labor rates, permit data, and AR measurement built in.
§ St. Louis fast facts

QUICK ANSWERS.

Do I need a permit to replace windows in St. Louis City vs. St. Louis County?

Yes, in most cases — but the jurisdiction matters. St. Louis City and St. Louis County are entirely separate governments. Work inside City limits goes through the St. Louis Building Division. Work in county municipalities like Kirkwood, Webster Groves, or Florissant is permitted through each city's own building department. Always confirm with the local AHJ before starting work, because permit requirements and fees differ across the county's 90-plus municipalities.

§ Built for St. Louis

LOCAL FACTS.

AVG WINDOW INSTALLER LABOR RATE – ST. LOUIS METRO.

Window installation labor in the St. Louis metro runs approximately $38–$52 per hour for experienced installers, based on BLS Occupational Employment data for glaziers and construction laborers in the St. Louis MSA (2023).

ST. LOUIS CITY RESIDENTIAL WINDOW PERMIT FEE (TYPICAL REPLACEMENT JOB).

The City of St. Louis Building Division charges a minimum permit fee of $75 for residential alteration work; replacement window permits on a single-family home typically fall in the $75–$150 range depending on valuation, with separate municipalities in St. Louis County setting their own schedules.

MISSOURI / ST. LOUIS CLIMATE ZONE FENESTRATION CODE REQUIREMENT.

St. Louis is IECC Climate Zone 4A. Under Missouri's adopted 2021 IECC prescriptive path, replacement fenestration must meet U-factor ≤ 0.32 and SHGC ≤ 0.40. Non-compliant product specs can trigger plan review delays or failed inspections.

PEAK DEMAND SEASON FOR WINDOW REPLACEMENT IN ST. LOUIS.

Window replacement inquiries in St. Louis spike in March–May (spring pre-heat prep) and again in September–October (pre-winter close-up), driven by the region's wide temperature swing from 12°F winter lows to 95°F summer highs.

§ Why windows pros in St. Louis use Estimate.Pro

THE BID ENGINE.

## Window Estimating in St. Louis Moves Fast — Your Bids Should Too St. Louis sits in a climate zone that punishes single-pane glass hard. Winters push into the low teens. Summers run humid and well above 90°F. That means homeowners in South City row houses, Kirkwood ranches, and Chesterfield subdivisions are actively replacing windows — and they're collecting multiple bids before they sign. If you're still building estimates in a spreadsheet, you're slower than the contractor who isn't. Estimate.Pro takes you from a job-site walkthrough to a sendable bid in a median of 8 minutes. That's not a rounding estimate. That's the measured median across contractors using the platform. --- ## What Makes Window Estimating Different in St. Louis **Historic stock is everywhere.** The city's Compton Heights, Tower Grove, and Lafayette Square neighborhoods are loaded with pre-1950 construction. Those openings are rarely standard size. You're measuring rough openings, dealing with brick mold, and accounting for custom-order lead times. A flat-rate pricing sheet doesn't cut it — you need per-opening scope that reflects actual site conditions. **Energy code compliance matters on every job.** Missouri follows the 2021 IECC, which sets minimum U-factor and SHGC requirements for fenestration. St. Louis is Climate Zone 4A. Residential replacement windows must meet U-factor ≤ 0.32 and SHGC ≤ 0.40 under prescriptive compliance. Your estimate should document the specified products against those thresholds — especially if the job involves a permit pull. **Permit requirements vary by municipality.** St. Louis City and St. Louis County are separate jurisdictions. A replacement window job in the City of St. Louis goes through the St. Louis Building Division. Work in Creve Coeur, Ballwin, or Florissant routes through separate municipal departments, each with its own permit fee schedule. Estimate.Pro lets you tag permit costs per job so nothing gets absorbed into your margin. **Brick veneer and stucco exteriors add scope.** Much of the older St. Louis housing stock has exterior brick. Cutting, patching, or wrapping around masonry adds labor hours that a standard window count misses. The AI scope builder in Estimate.Pro prompts for exterior material type during walkthrough so those line items show up in the estimate, not in a change order. --- ## How the App Works for Window Contractors **AR measurement on supported devices.** Point your phone at an opening and the ONNX-assisted live AR measurement captures rough opening dimensions on supported devices. Camera and photo measurements are clearly marked as estimates. You're not guessing — you're documenting. **AI scope-of-work generation.** Describe what you see during the walkthrough — frame rot, existing trim, interior finish work, number of openings, product spec — and the AI drafts a scope that covers labor, material, and disposal. You review and edit. The client gets a professional line-item bid. **Your saved material cost workspace.** St. Louis distributor pricing on Andersen, Pella, and stock vinyl units changes. You update your material costs once in your workspace. Every future estimate pulls from that saved data, not a stale template. **No platform fee on Pro+.** Free tier carries a 3% Stripe Connect fee on payments collected through the app. Pro at $39/seat/month and Elite at $79/seat/month drop that fee to 0%. If you're collecting $40,000 a month through the platform, the math on upgrading is straightforward. --- ## Built for the Way You Work Estimate.Pro supports 25 trades. Window contractors use the same platform as their HVAC, roofing, and siding counterparts — which matters when you sub out glass block or coordinate with a stucco crew on a full exterior envelope job. The free tier requires no credit card. You can build a real estimate today and decide if the paid tiers make sense after you've seen the output. St. Louis window contractors are competing for jobs from South County to St. Charles. The ones winning more bids are responding faster with cleaner numbers. Estimate.Pro is how you do that.
§ Equip the crew

Bid faster in St. Louis.

14-day Pro trial, no card. Free forever fallback. Built for window contractors.