What does a home addition permit cost in Fort Worth?
Updated November 11, 2026 · Built from official fee schedules and city permit records
How Fort Worth figures the fee
Additions use the same square-footage table as new homes, with a lower rate for small R-3 additions: up to 500 sq ft pays $61.01 for the first 65 sq ft plus $0.45 per extra square foot. Add the $33.08 application and $16.87 technology fees.
| Addition size | Building permit fee | With fees |
|---|---|---|
| 200 sq ft | $121.76 | $172 |
| 347 sq ft | $187.91 | $238 |
| 500 sq ft | $256.76 | $307 |
| 800 sq ft | $623.00 | $673 |
| 1,200 sq ft | $835.00 | $885 |
How long it takes
Across 276 home addition permits Fort Worth issued in the last 12 months, the median wait was 21 days. A quarter took 14 days or less, and a quarter took 44 days or more.
The project value declared on these permits had a median of $25,000; the middle half ran from $10,000 to $61,666. Many fees are figured from this number, so it is the best guide to what a similar project will pay.
Good to know
- Trade permits for the addition's electrical, plumbing and HVAC are separate.
More Fort Worth permit guides
- Building permit cost in Fort Worth
- How long permits take in Fort Worth
- New house permit cost
- Remodel permit cost
Sources
- Fees: Fort Worth Development Services fee schedule, Ordinance 26-28781 (October 2026)
- Permit data: Fort Worth Development Permits (data.fortworthtexas.gov), permits issued November 1, 2025 to October 31, 2026. Processing time is measured from file date to issue date, for permits currently in Issued status.
- Wait times use permits that still show Issued status.
This is an independent guide built from public records. It is not affiliated with the Fort Worth Development Services. Fees change, and the city calculates your final fee when you apply; confirm the amount with the city before you budget.
Common questions
How much is a home addition permit in Fort Worth?
About $238 for a 347 sq ft addition.
How long does an addition permit take in Fort Worth?
The median was 21 days.