How Much Does Window Replacement Cost in St. Pete?
Prices last checked: October 2026
Most St. Petersburg homeowners pay $550–$2,200 per window installed. Non-impact vinyl runs $550 to $1,200, impact-rated vinyl $900 to $2,000, and aluminum-framed impact units $1,250 to $2,200. Sliding glass doors run $1,800–$4,500 non-impact and $3,000–$8,500 impact-rated. These are Pinellas numbers, checked against what local companies actually quote — not a national average.
Cost per window installed
Windows are priced per opening, not per square foot. These are the brackets quoted across St. Petersburg, Gulfport, Pinellas Park and the rest of the county — there is no travel charge anywhere in Pinellas.
| Window | Non-impact | Impact-rated |
|---|---|---|
| Vinyl single-hung (standard) | $550–$850 | $900–$1,400 |
| Vinyl horizontal slider | $600–$950 | $1,000–$1,600 |
| Casement or awning | $700–$1,100 | $1,100–$1,800 |
| Picture / fixed, large | $750–$1,200 | $1,150–$2,000 |
| Aluminum frame, any style | $800–$1,300 | $1,250–$2,200 |
Impact glass typically adds about 50 to 70 percent to the same window in non-impact glass. That gap is the single biggest number on most quotes, and it is the reason two companies can be thousands apart on the same house.
Sliding glass doors
| Door | Non-impact | Impact-rated |
|---|---|---|
| Two-panel (approx. 6 ft) | $1,800–$3,000 | $3,000–$6,000 |
| Three-panel (approx. 9 ft) | $2,800–$4,500 | $4,500–$8,500 |
| Four-panel or pocket | Quoted per opening | Quoted per opening |
Whole-home projects
Doing every opening at once usually costs less per window and is the only route to a wind-mitigation insurance credit, which requires the whole envelope protected.
| Home | Non-impact vinyl | Impact-rated vinyl |
|---|---|---|
| Small, 8–10 openings | $5,500–$9,000 | $9,000–$15,000 |
| Typical, 12–16 openings | $7,500–$13,000 | $12,000–$22,000 |
| Large, 18+ openings | $10,000–$18,000 | $16,000–$32,000 |
What St. Petersburg actually requires
Most window companies will tell you a permit is needed and leave it there. Here is the detail, taken from the City of St. Petersburg Building Department’s own Window & Door Residential Compliance Form, because it changes what you are buying.
| Requirement | What it means for you |
|---|---|
| Design wind speed 145 mph, Exposure B | St. Pete sits above the 140 mph line that defines Florida’s wind-borne debris region. Every opening has to be protected. |
| “New windows in St. Petersburg must have shutters or impact glass” | The City’s wording, not ours. Non-impact glass is allowed, but then shutters are mandatory and the glass still has to be rated for the wind load. |
| Compliance form filed with the permit | Every unit is listed by manufacturer, model and Florida Product Approval or NOA number. There is nowhere to hide a cheaper window. |
| Installation instructions on site | The inspector checks anchors and fastener spacing against the manufacturer’s details. This is where bad installs fail. |
| All labels stay on until final inspection | If someone peels the stickers off on install day, the inspection fails and the permit stays open. |
A quote that does not mention the permit is not a quote for the same job. An unpermitted window surfaces when you sell, and an open permit can hold up a closing.
The insurance side
Florida law requires insurers to offer a windstorm mitigation discount, and opening protection is one of the credits. Pinellas homeowners who protect every opening commonly report $750 to $1,600 a year off the premium, though the figure depends on your carrier, your roof and the age of the home.
Two things people get wrong:
- It has to be every opening. Protect most of the house and leave two windows unprotected and the opening-protection credit does not apply.
- You need the inspection. The credit comes from a licensed wind mitigation inspection, not from the invoice. We hand you the product approval numbers and the closed permit, which is what the inspector asks for.
What moves the price
- Impact rating. The single biggest factor — usually 50 to 70 percent more than the same window in non-impact glass.
- Size. Priced per opening, so a wide picture window costs more than two small ones even though it is one unit.
- Frame material. Vinyl insulates better and costs less; aluminum is slimmer and carries bigger panes.
- Floor level. Second-floor openings need more setup and sometimes scaffolding.
- Condition of the opening. Rotten framing or a sill that has to be rebuilt is extra, and it is priced only once we can see it.
- Order size. Twelve windows cost less each than two.
- A historic district. Old Northeast, Historic Kenwood, Crescent Heights and Roser Park carry extra review on anything that changes the street-facing elevation. It adds time, and sometimes a specific frame profile or color.
Add-ons, priced separately
| Item | Typical cost |
|---|---|
| City permit and final inspection | Included — roughly $7 per $1,000 of job value |
| Stucco patch and paint around a frame | $75–$200 per opening |
| Rotten framing repair | $150–$500 per opening |
| Opening resize (block cut) | Quoted per opening |
| Obscure, tinted or Low-E upgrade glass | $40–$150 per window |
| Interior trim replacement | $60–$140 per opening |
| Wind-mitigation documentation pack | Included |
Why three St. Pete quotes come back thousands apart
This is the part a national cost guide cannot tell you, and it is usually why the cheapest quote turns out not to be the cheapest job.
- Impact versus non-impact. The commonest reason by far. Make sure all three quotes are for the same glass rating before comparing a single number.
- Whether the permit is in there. A quote without a permit is not a quote for the same work. Unpermitted windows surface when you sell and can cost you the insurance credit.
- Which product approval. Florida product approval numbers are public. A cheaper window is often a lower design-pressure rating, which matters on an exposed elevation.
- What happens if the opening is rotten. Some quotes stay silent and the change order arrives mid-job. Ask how it gets handled before you sign.
- Who is actually installing. Ask whether it is an employed crew or a subcontractor, and ask for the certificate of insurance either way.
Every range on this page is a St. Pete bracket for a typical home, not a teaser number. The exact figure comes from the free in-home measure, in writing, and once given it does not move. If something behind the old frame changes the job, you see it and approve it before we carry on.
St. Pete pricing questions
Want your exact number?
The measure is free and the written price does not change. Or call (727) 604-6514.