Short answer: replacing a standard window in St. Petersburg costs an estimated $550–$1,100 in non-impact vinyl and $900–$2,000 with impact glass, installed, permit included. Most houses we see still have 1970s or 1980s aluminum windows, and they are almost always worth replacing rather than repairing.
Signs a window is past saving
- Chalky, pitted aluminum. Decades of salt air eat the frame. Once the corrosion reaches the corners and the sash tracks, the window will not seal again.
- Sashes that will not lock. Bent tracks and worn latches are a security problem as well as a draft.
- Jalousie louvers. They never close tightly, cannot be made to meet current wind ratings, and leak in every summer storm.
- Water stains below the sill. If water is getting into the wall, the issue is often the frame and its flashing, not the glass.
- Fog in several windows at once. One fogged unit is a repair. Half the house fogging means the seals are at the end of their life together.
If it is only one of these on one window, look at window repair first. We will say so at the measure.
What a replacement involves here
Most St. Pete homes are concrete block with stucco, and their windows sit in a wood or concrete buck set into the block. A proper replacement takes the old window out completely rather than slipping a new one inside the old frame. That lets us see the buck, replace any rot, and anchor the new unit into the masonry at the spacing its Florida Product Approval calls for.
- Measure and check. Every opening measured from outside and in, plus the sill and buck checked for rot.
- Quote and permit. A written price per opening, then the City of St. Petersburg permit with each window's approval number listed.
- Remove. Old window cut out, opening cleaned back to sound material, any damaged buck replaced.
- Set and anchor. New window set level and square, anchored into the block, then sealed with the gaps foamed.
- Finish and inspect. Stucco patched outside, trim finished inside, then the city inspector checks the anchors and the labels.
Frames and glass for this climate
Vinyl is what most homeowners here choose: it does not corrode, it insulates far better than aluminum, and it costs the least. Aluminum still has a place on very large openings and on houses right on the water, provided it has a coastal-grade finish. For glass, Low-E double-pane is the baseline for a west-facing room in St. Pete; tint and privacy glass are inexpensive extras for bathrooms and street-side rooms.
Impact or not?
St. Petersburg sits inside Florida's wind-borne debris region, so every new window must be either impact-rated or protected by approved shutters. Non-impact windows cost less up front, but the shutters are part of the price. Our quotes show both versions of every opening side by side. The impact windows page covers the trade-off in detail.
Replacement prices
| Job | Estimate | What it covers |
|---|---|---|
| Single-hung, vinyl, non-impact | $550–$900 | The most common replacement in St. Pete |
| Horizontal slider, vinyl, non-impact | $600–$1,000 | Two-lite rolling window |
| Casement or awning, non-impact | $700–$1,200 | Crank hardware adds to the price |
| Large picture window, non-impact | $750–$1,400 | Fixed glass; size drives the price |
| Whole house, 12–16 openings, non-impact | $8,000–$15,000 | Shutters still needed for storm protection |
Estimates, not a quote. These ranges come from Florida installers' published prices and national cost guides, checked October 8, 2026. The measure tells us the real sizes, the state of each opening and what you want, and only the written quote that follows is a price. More detail on the St. Petersburg window price guide.
Related services
Also in St. Petersburg: impact windows · window repair · sliding glass doors, or new window installation for additions and remodels.
Questions
How long does window replacement take?
The visit, quote and permit come first. Custom windows are then built to your measurements, which usually takes a few weeks. Installation itself is quick: one or two days for most houses, often less for a handful of windows.
Do I have to replace every window at once?
No. Many owners start with the worst side of the house or the rooms that get the afternoon sun. Doing it in stages costs a little more overall, because each stage needs its own permit and trip, but it spreads the spend.
Will new windows lower my power bill?
Usually, if you are replacing single-pane aluminum. Low-E double-pane glass blocks much of the solar heat that pours through old windows on west and south walls. How much you save depends on the house, so we will not promise a number.
Last updated October 8, 2026