The houses
| Municipality | Housing units | Built 1950–1969 | Built before 1980 | Median year built |
|---|---|---|---|---|
| Florissant | 23,064 | 70.7% | 89.5% | 1963 |
| Ferguson | 9,335 | 53.2% | 90.9% | 1957 |
| St. Ann | 6,098 | 51.1% | 86.4% | 1957 |
| Overland | 6,675 | 48.8% | 91.2% | 1955 |
| Hazelwood | 12,379 | 43.9% | 65.6% | 1970 |
| Bridgeton | 5,066 | 26.0% | 58.4% | 1977 |
U.S. Census Bureau, ACS 2020–2024 5-year, B25034/B25035.
What is in the openings now
- Steel casements (1950s): single-glazed, a crank at the sill, hinges that have rusted, a frame that conducts January straight through the wall. Not repairable into a decent window. Full-frame replacement with a modern casement that keeps the look, or a double-hung if you prefer.
- Aluminum sliders (1960s–70s): hollow, non-thermally-broken frames with a U-factor around 1.0 — four times the heat loss of a modern unit — plus condensation and ice on the inside track in winter. Full-frame.
- Wood double-hungs with spring balances (1950s–60s, the better subdivisions): often sound; insert replacement or balance repair is possible. See repair or replace.
- The picture window: a single fixed pane, sometimes with flanking casements or double-hungs under one header; replaced in kind as a fixed low-e unit, or as a three-lite unit if you want ventilation.
- Jalousies and porch enclosures: louvered single glass; replaced with sliders or awnings when the porch is finished as a room.
A brick-veneer ranch has a brick skin over a frame wall; the window sits in the frame with a nailing fin behind the brick, so a full-frame job here is a frame-wall job with brick on the outside — less involved than a City masonry opening, but the exterior trim is still in view. See full-frame replacement.
Lead-safe work on nearly every house
Pre-1978 is the trigger for the EPA's Renovation, Repair and Painting rule, and in North County that is nearly every house: window replacement is specifically written out of the rule's minor-repair exemption, so containment, HEPA cleanup and cleaning verification are on every quote here. A 1960s steel casement was painted, repainted and painted again; the dust from pulling it is exactly what the rule exists for. See lead-safe window replacement.
Storms
North County has had two in two years. On March 14, 2024, the metro-wide hailstorm that dropped 3-to-4-inch stones across the region also produced five EF-0 tornadoes, including one in Charlack. On May 16, 2025, the EF-3 that crossed the City continued across the North Riverfront and the river into Madison County; North County's eastern edge saw the same system. Missouri insurers have paid over $475 million on more than 10,000 claims from the 2025 storm as of May 2026. On a 1960s ranch the claim question is usually simple: cracked glass and bent aluminum frames are storm damage; a picture window that has been fogging since 2015 is not. Storm damage window replacement covers documentation.
Permits
Florissant, Ferguson, Hazelwood, St. Ann, Overland and Bridgeton each issue their own building permits, and we have not yet verified from each code whether a same-size replacement needs one. We confirm the rule for your address at the measure visit. Unincorporated North County falls under St. Louis County Public Works, whose rule we are also confirming. See the permits guide. There are no City of St. Louis historic-district rules here.
What it costs here
| Job | Typical installed (2026) |
|---|---|
| Steel casement out, vinyl or fiberglass casement in, full-frame, brick veneer | $900 – $1,900 per opening |
| Aluminum slider out, vinyl slider or double-hung in, full-frame | $800 – $1,300 |
| Picture window, fixed low-e, replaced in kind (large units after measure) | $750 – $1,250 |
| Wood double-hung, insert, sound frame | $550 – $950 |
| 1962 Florissant ranch, 10 openings, casements and picture window, full-frame | $9,100 – $15,300 |
Because the whole house is usually the same era and the same window, North County quotes are the most predictable in the metro. See the cost guide or run the instant estimate with the 1950–1979 era setting, which prices the metal-sash full-frame case.
Not ready to talk yet?
Start with the complete St. Louis replacement window guide, then window styles and materials for the casement-versus-double-hung decision.
Frequently asked questions
Can I keep the casement look? Yes. A modern casement in vinyl or fiberglass has a wider frame than the old steel, which we discuss at the measure, but the proportions can be kept.
Will new windows fix the ice on the inside of my sliders? Yes. The ice is condensation freezing on a conductive aluminum frame; a vinyl or fiberglass frame with low-e glass does not get cold enough inside to do that.
Is there a tax credit? Not in 2026; see tax credits and rebates. Ameren's rebates cover insulation and HVAC, not windows.