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Replacing Windows in Orlando: Product Approval & Inspection

Updated 2026-08-30 · Sources verified 2026-07-20

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Orange County requires a permit. Permit in Orange County: permit required. Product must carry a Florida Product Approval number rated for the site's design pressure, with the Product Approval sheet filed and install instructions on site at inspection. The full rule and its official source are below, with the code requirements and mistakes that trip up Orlando homeowners.

Key facts before you start

Orange County requires a permit — its Do I Need a Permit page answers "New exterior windows, exterior doors, garage doors? Yes." On Fast Track it files as Work Type "Windows\Doors Replacement size for size" with a floor plan marking every opening plus a completed Orange County Product Approval Specification Sheet. The permit only closes on a passed 290 Final Inspection; letting it expire costs reinstatement fees and updated plans.
Buying trap: the Florida Product Approval number must include the decimal — Orange County's form says "you must enter the entire number including the numbers after the decimal point." The header FL# (FL26942-R5) is the application; the decimal child (26942.1) is the model you actually bought. Pull it on floridabuilding.org before you buy and confirm three fields: Code Version 2023, "Approved for use outside HVHZ: Yes" (the HVHZ is Broward and Miami-Dade only), and Status Approved.
Print the approval's Installation Instructions DRAWING and keep it on site — Orange County: "You are required to have the approved installation details on the jobsite for inspection. Failure to do so will result in a failed inspection." The sales brochure is not the drawing. A headline "DP +80/-80" does not apply at every size; the drawing carries the span-vs-load table and sets anchor type, spacing, and edge distance.
A retrofit is NOT grandfathered. FBC Existing Building 2023 707.4: replacement windows "shall be designed and constructed to comply with Chapter 16 of the Florida Building Code, Building" — so even a pocket insert dropped into the old frame needs an approval rated for today's design pressure at that opening. And there is no citywide DP number: FBC-R R609.2 computes it per opening from the wind speed in Figure R301.2(4), the cladding zone in Figure R301.2(7), and the effective wind area, so a small unit and a corner unit see higher pressure than the big one mid-wall.
Bedroom egress is where a cheap swap gets expensive. FBC-R R310.2.1-R310.2.3 demand FOUR numbers at once from the NET CLEAR opening the sash actually makes — 5.7 sq ft (5.0 at a grade floor), 24 in min height, 20 in min width, sill no more than 44 in above the floor. The exemption everyone assumes is narrow: R310.2.6 waives those ONLY if the replacement is the manufacturer's LARGEST standard size that fits the existing frame or rough opening AND keeps the same operating style (or one with equal-or-greater opening). Spec a smaller insert and you lose it.
Second-storey bedrooms hit a rule that pulls the other way: FBC-R R312.2.1 — where an operable window's clear opening is under 24 in above the finished floor and more than 72 in above the ground outside, it must either refuse a 4-in sphere at its largest opening, or carry ASTM F2090 fall-prevention devices or a compliant opening control device. Egress wants it big and low; fall protection wants it guarded. Resolve both before you order.
Tempered glass is the most common re-order. FBC-R R308.4.5: glazing in a wall containing or facing a tub, shower, spa or pool is hazardous when its bottom edge is under 60 in above any standing surface, unless it is more than 60 in horizontally from the water. R308.4.2 adds panes within 24 in of a door's edge with a bottom edge under 60 in. R308.1 requires a permanent manufacturer's designation "visible in the final installation" — an unmarked pane fails. Note R308.4.3 (the big-window rule) is an AND of four conditions, not an OR: pane over 9 sq ft, bottom under 18 in, top over 36 in, AND a walking surface within 36 in.
Energy code applies to a straight swap: FBC Energy Conservation 2023 R503.1.1.1 sends replacement fenestration to Table R402.1.2, and Orange County is Climate Zone 2A — max U-factor 0.40, max SHGC 0.25. Footnote j raises the ceiling to U-0.65 for impact-rated units, and replacing several windows allows an area-weighted average. Leave the NFRC label on the glass until final inspection: R303.1.3 assigns unlabelled products a default from Table R303.1.3(1)/(2) that is worse than the number you paid for.
IMPACT-RATED windows are the replace-and-protect path Orlando searches for most: the impact resistance lives in the glazing and frame, verified the same way as any Florida window — a Florida Product Approval number tested to your site's design pressure, with the approval sheet and installation instructions on the jobsite at inspection. The permit is the same as any window replacement, so if replacement is already on the table, pricing impact-rated units against ordinary units plus dedicated shutters is the honest comparison — protection you never have to deploy versus panels you put up each storm (Florida Product Approval).

The permit answer

Permit required. Permit required; product must carry a Florida Product Approval number rated for the site's design pressure, with the Product Approval sheet filed and install instructions on site at inspection.
Source: https://www.orangecountyfl.net/PermitsLicenses/Permits/Exterior-Windows-Doors.aspx

Orange County and the City of Orlando run separate permit offices with separate portals — and your mailing address alone doesn't tell you which one covers your home. Check which permit office covers your address →

Window Replacement: what it looks like

new window with unfinished drywall below sill

old aluminum window with white exterior trim

What it costs

DIY: $250–$1,400+ per window for the unit alone (materials only)
Hiring it out: $450–$1,500 per window installed (standard); hurricane/impact windows $400–$1,200 each installed, $6,000–$24,000 for an average house
Impact-rated windows are built for Category 5 wind ratings; frame material and window count move the per-window price
Published national figures (HomeGuide, checked Aug 2026): https://homeguide.com/costs/window-replacement-cost. Prices move — the free planner pulls current retail prices for your exact repair.

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Frequently asked questions

Do I need a permit for a window replacement in Orange County, FL?

Permit required. Permit required; product must carry a Florida Product Approval number rated for the site's design pressure, with the Product Approval sheet filed and install instructions on site at inspection.

Are there specific building-code requirements for a window replacement?

Orange County requires a permit — its Do I Need a Permit page answers "New exterior windows, exterior doors, garage doors? Yes.".

What does a window replacement cost?

DIY: $250–$1,400+ per window for the unit alone (materials only) Hiring it out: $450–$1,500 per window installed (standard); hurricane/impact windows $400–$1,200 each installed, $6,000–$24,000 for an average house Impact-rated windows are built for Category 5 wind ratings; frame material and window count move the per-window price Published national figures (HomeGuide, checked Aug 2026) — local prices vary, and the free DIYrr planner pulls current retail prices for your exact repair.

Looking for a different repair?

Sources

https://www.orangecountyfl.net/PermitsLicenses/Permits/Exterior-Windows-Doors.aspx
https://www.orangecountyfl.net/Portals/0/resource%20library/permits%20-%20licenses/Product%20Approval-CERT.pdf
https://www.orangecountyfl.net/PermitsLicenses/DoINeedaPermit.aspx
https://www.floridabuilding.org/pr/pr_app_srch.aspx
https://up.codes/viewer/florida/fl-existing-building-code-2023/chapter/7/alterations-level-1
https://up.codes/viewer/florida/fl-residential-code-2023/chapter/3/building-planning
https://up.codes/viewer/florida/fl-energy-conservation-code-2023/chapter/RE_5/re-existing-buildings
https://up.codes/viewer/florida/fl-residential-code-2023/chapter/6/wall-construction

This guide is general informational content, not professional or legal advice. Codes and county rules change — confirm permit requirements with your local building department, and use a licensed professional for electrical, gas, structural, or main-line plumbing work.