Do I Need a Permit for Window Replacement in St. Petersburg, FL?
Window replacement in St. Petersburg is unlike window replacement in most other US cities. Florida's Building Code treats every glazed opening as a potential structural vulnerability in a hurricane — and St. Pete's position on the Pinellas Peninsula, fully surrounded by water and exposed to Gulf of Mexico storm systems, makes that concern concrete. Every window replacement project requires a permit, and every replacement window must either be impact-resistant or covered by an approved hurricane protection system. The insert-versus-full-frame distinction that governs permit requirements in Texas, Indiana, and California doesn't apply here — Florida requires a permit for all window replacements, full stop.
St. Petersburg window replacement permit rules — the basics
The Florida Building Code's approach to window replacement in St. Petersburg is categorical: all window and door projects, whether new installation or replacement, must be permitted with the local municipality (Construction Services). This applies regardless of whether the project is replacing a single window or all windows in the home, whether it's an insert replacement or a full-frame replacement, and whether the scope involves changing rough opening sizes or not. The permit verifies that the installed product provides proper hurricane protection and meets the applicable Florida Product Approval (FPA) requirements for the wind zone.
The core hurricane protection requirement for all glazed openings in St. Petersburg is dual-path compliance: every window must be either (1) impact-resistant glazing — laminated glass with a PVB or SGP interlayer that meets the Florida Building Code's wind load and impact resistance requirements and carries a Florida Product Approval number, or (2) protected by an approved impact covering — accordion shutters, roll-down shutters, or removable storm panels that meet Florida Product Approval standards for the applicable wind loads. Homeowners who choose non-impact windows must also install and maintain the approved hurricane shutters or panels for every glazed opening, and those protection systems must also be permitted and Florida-product-approved. Most Pinellas County homeowners replacing windows in 2024 or later choose impact glass because it provides permanent protection without manual deployment before storms — a practical advantage in Pinellas County's compressed hurricane preparation windows during active storm tracking.
St. Petersburg's design wind speed for Risk Category II residential structures is approximately 145 mph ultimate design wind speed (Vult). This is the wind speed for which windows must be designed and tested. Windows used in St. Pete must carry Florida Product Approval (FPA) from the Florida Building Commission — specifically, the product's FPA must list the applicable design pressure ratings (both positive and negative) for the installation location. The product must pass cyclical pressure testing and, for impact-rated products, large missile impact testing. The building inspector at the window permit inspection verifies that the installed product has a valid FPA number and that the product was installed per the manufacturer's FPA installation instructions (proper anchoring, number and size of fasteners, flashing requirements).
The 25% rule embedded in Florida's Building Code adds another dimension to window replacement planning: if more than 25% of a home's total window area is replaced within a 12-month period, all replaced windows in that period must meet the current impact protection standards required for new construction. For homeowners planning a staged window replacement — replacing a few windows this year and more next year — staying below the 25% threshold in any 12-month window avoids triggering this upgrade requirement for the entire replacement cohort. For homeowners planning a whole-house window replacement, the 25% rule is irrelevant (they're already replacing everything), and selecting full impact windows provides the most comprehensive protection and the best long-term insurance rate outcome.
Three St. Petersburg window replacement scenarios
| Variable | How It Affects Your St. Pete Window Permit |
|---|---|
| Permit Always Required | Florida Building Code requires permits for all window replacements — unlike Texas (insert exempt) or Indiana (insert exempt). There is no permit exemption for like-for-like, insert, or single-window replacements in St. Petersburg. Apply through Construction Services before any window is removed |
| Impact Glass OR Approved Shutters Required | Every glazed opening must be either (1) impact-resistant glass with Florida Product Approval, or (2) protected by FPA-approved shutters (accordion, roll-down, or removable panels). Both options are code-compliant. Impact glass provides permanent protection; shutters require manual deployment before storms |
| Florida Product Approval Required | All windows installed in St. Pete must have a valid Florida Product Approval (FPA) number from the Florida Building Commission (floridabuilding.org). The FPA must list the applicable design pressures for the installation location. Products without FPA cannot be legally installed on permitted projects in Florida |
| The 25% Rule | If more than 25% of a home's total window area is replaced within any 12-month period, all replaced windows must meet current impact protection standards. Plan staged replacements to stay below the 25% threshold per year if using the shutter path — or choose impact glass throughout and avoid managing the threshold |
| NOT in HVHZ | St. Petersburg is in the Wind-Borne Debris Region but NOT in the High Velocity Hurricane Zone (HVHZ, which applies only to Miami-Dade and Broward). WBDR impact requirements are rigorous but less demanding than HVHZ's extreme testing protocols. Most major impact window manufacturers' standard Florida lines are rated for St. Pete's wind zone |
| Wind Mitigation Inspection Payoff | Installing FPA-approved impact windows opens the door to wind mitigation insurance credits in Florida. A certified wind mitigation inspector documents the installed protection — credits can reduce homeowner's insurance premiums by hundreds of dollars annually in Pinellas County's post-2024-hurricane insurance market |
Impact windows vs. hurricane shutters in St. Pete — the real comparison
The choice between impact glass and hurricane shutters is the most consequential decision in a St. Petersburg window replacement project. Both are code-compliant. Both provide the hurricane protection required by the Florida Building Code. The decision comes down to upfront cost, long-term convenience, aesthetics, and the insurance calculation.
Impact windows carry a higher upfront cost — typically 40–80% more than standard non-impact windows of equivalent size and style. A whole-house impact window replacement project in a typical St. Pete bungalow runs $25,000–$55,000, while non-impact windows with accordion shutters on the same home might run $20,000–$40,000 combined. The cost differential narrows when you factor in two things: first, impact glass is a one-time purchase that provides permanent protection, while accordion shutters require periodic maintenance (tracks, hardware, replacement blades over time); second, Florida's wind mitigation insurance credit system rewards impact glass installations with premium reductions that can amount to hundreds of dollars annually — credits that partially offset the higher upfront cost over the system's life.
The most significant practical advantage of impact glass is the storm preparation burden. In Pinellas County, the compressed window between tropical storm development and landfall means homeowners have little time to deploy removable storm panels before evacuation. Accordion shutters require manual closing (30–60 minutes for a typical home), and removable storm panels require time to retrieve and install. Impact glass requires nothing — it is always protecting the home. After the 2024 hurricane season's rapid-developing storms, many St. Pete homeowners who previously relied on removable storm panels have reconsidered and switched to permanent protection. Impact glass is the dominant choice for new window replacement projects in Pinellas County in the current market.
What window replacement costs in St. Petersburg
Window replacement costs in St. Pete reflect Florida's hurricane-zone market with the impact glass premium. Non-impact double-pane vinyl windows (requiring separate shutter permits): $300–$600 per window installed. Impact vinyl windows (laminated glass, FPA-approved): $450–$900 per window installed. Impact aluminum windows: $500–$1,000 per window installed. PGT, CGI, Simonton Impact, and Andersen Stormwatch are common brands in the Pinellas County market. A 14-window whole-house impact replacement: $28,000–$50,000 installed. Permit fees: approximately $150–$400 for the window permit; additional $100–$200 if a shutter permit is also needed. NOC recording at Pinellas County Clerk: approximately $10–$15 for job values over $5,000.
Main: 727-893-7231 | Email: permits@stpete.org
Online: stpe-egov.aspgov.com/Click2GovBP
Hours: M/T/Th/F 8am–4:30pm; Wed 8am–12pm
Florida Product Approval database: floridabuilding.org
Pinellas County Licensing Board: pinellas.gov
Common questions about St. Petersburg window replacement permits
Is St. Pete in the High Velocity Hurricane Zone for window requirements?
No — St. Petersburg is in Florida's Wind-Borne Debris Region (WBDR) but not in the High Velocity Hurricane Zone (HVHZ), which applies only to Miami-Dade and Broward counties. WBDR windows must meet Florida Product Approval standards for the applicable wind zone (approximately 145 mph design wind speed for St. Pete's Risk Category II residential structures). While WBDR requirements are rigorous — impact testing, cyclical pressure testing, FPA listing — they are less demanding than HVHZ's extreme protocols. Most major impact window manufacturers' standard Florida product lines are rated for St. Pete's wind zone without requiring HVHZ-specific testing.
Can I replace a single broken window in St. Pete without a permit?
No — the Florida Building Code requires a permit for all window and door replacements in St. Petersburg, including single-window replacements. Contact Construction Services at 727-893-7231 before removing any window for replacement. The permit verifies that the replacement window meets the applicable hurricane protection requirements. Replacing a single window without a permit risks code enforcement action and creates an undocumented gap in your home's hurricane protection envelope — which can affect insurance coverage.
Do I need impact windows or just shutters?
Both options are code-compliant under the Florida Building Code. Every glazed opening must have either (1) FPA-approved impact-resistant glass, or (2) FPA-approved impact coverings (accordion shutters, roll-down shutters, or removable storm panels). If you choose non-impact windows, you must also obtain a permit for and install FPA-approved shutters on every window opening. Impact glass provides permanent protection without manual deployment; shutters require closing before every storm. Both options require permits in St. Petersburg — the impact path uses one window permit; the non-impact-plus-shutters path requires both a window permit and a shutter permit.
How does window replacement affect my homeowner's insurance in St. Pete?
Installing FPA-approved impact windows qualifies the home for wind mitigation insurance credits in Florida. A certified wind mitigation inspector completes a standardized inspection form documenting the installed impact protection, which is submitted to your insurance carrier. In Pinellas County's post-Helene/Milton insurance market, wind mitigation credits for impact windows and doors can reduce annual premiums by $500–$2,000 or more, depending on the carrier, policy, and home age. Contact your insurance agent before finalizing the window replacement scope to confirm the credit structure — in some cases, the annual premium savings meaningfully reduce the net cost of the impact glass upgrade over the first several years of ownership.
What is the 25% rule for window replacement in Florida?
The Florida Building Code's 25% rule states that when more than 25% of a home's total window and door area is replaced within any 12-month period, all replaced openings must meet the current impact protection standards required for new construction. This means that a homeowner who replaces a few windows without impact glass this year and crosses the 25% threshold next year must use impact glass for the openings replaced that second year. Homeowners planning staged window replacement projects should track the percentage carefully, or simply choose impact glass throughout to avoid managing the threshold.
What energy performance standards apply to windows in St. Pete?
Pinellas County is in IECC Climate Zone 1 — the warmest zone, covering extreme southern Florida and the Keys — where the energy code's U-factor requirements are less restrictive than northern states but the SHGC (Solar Heat Gain Coefficient) requirements are more demanding. Climate Zone 1 prescribes a maximum SHGC of 0.25 for vertical fenestration to limit solar heat gain in Florida's intense sun environment. The impact glass in FPA-approved impact windows typically uses low-e coatings that simultaneously provide solar heat control (low SHGC) and UV protection, and most current FPA-approved impact window products for Pinellas County meet the SHGC requirements without requiring special selection. The NFRC label on the window product shows both the U-factor and SHGC — verify both values on the spec sheet when selecting products.
This page provides general guidance based on publicly available sources as of April 2026. St. Petersburg Construction Services requirements and Florida Building Code window provisions may change. Always verify current requirements with Construction Services at 727-893-7231 before beginning any window replacement project. For a personalized report, use our permit research tool.