Northeast Florida
Impact Window Installation in Nassau County, Florida
Permit requirements, inspections and modeled costs for impact window installation in unincorporated Nassau County. If your address falls inside a city, the municipal building department issues the permit instead.
Verified August 2026
Do you need a permit for impact window installation in Nassau County?
Yes
Yes — a permit is required for impact window installation in Unincorporated Nassau County, FL. The work must be inspected before it can be closed out, and a licensed contractor generally has to pull the permit.
Budget $8,700 – $40,700 for the work itself (typically $17,900) plus $165–$765 in permit fees.
Nassau County cost model
| Budget scope | $8,700 |
|---|---|
| Typical project | $17,900 |
| Premium / complex | $40,700 |
| per window installed | $650 – $1,850 |
| Permit fees | $165 – $765 |
| vs national baseline | -3% |
| Timeline | 1-3 days of installation, 3-8 weeks including product lead time and permitting |
Inspections you should expect
- Window buck / opening inspection
- Installation and attachment
- Final inspection
What the county will ask for
- Building permit application
- Florida Product Approval or Miami-Dade NOA for each window
- Attachment and anchoring details
- Contractor license and insurance
- Window schedule with sizes and design pressures
Cities inside the county that permit their own work
If the property is inside these municipalities, apply to the city rather than the county.
We track 3 municipalities in Nassau County: Fernandina Beach, Callahan, Hilliard. Contact the city directly if your address is inside one of them.
Statewide rules that apply here
Nassau County enforces the 8th Edition (2023) Florida Building Code, effective December 31, 2023. Local amendments can add requirements but cannot reduce the statewide minimum.
Frequently asked questions
Do impact windows need a permit in Florida?
Yes. Replacing a window changes an opening protection assembly, so every Florida jurisdiction requires a permit with product approval numbers and attachment details for each unit.
Do impact windows lower insurance?
Florida requires insurers to offer wind mitigation discounts for approved opening protection. Have a wind mitigation inspection done after installation so the credit is applied.
Sources
Sources & verification
Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.