Navigating building permits in Denton County can be confusing — especially since the rules change depending on whether you’re inside city limits, in an ETJ, or in unincorporated county land. Here’s a practical breakdown for 2026.
City of Denton vs. Denton County: Know the Difference
This is where most homeowners get tripped up. Two different jurisdictions, two different sets of rules:
Inside Denton city limits: The City of Denton Development Services department handles all permits. They follow the 2021 International Building Code with local amendments.
Unincorporated Denton County: The county has minimal permitting requirements. Most residential work outside city limits requires only a septic permit (if applicable) and floodplain approval.
ETJ (extraterritorial jurisdiction): If you’re in Denton’s ETJ — common in areas south toward Highland Village or east toward Lake Lewisville — you may need permits from both the city and county depending on the work.
Not sure where your property falls? Check the Denton County Appraisal District or call Denton Development Services at (940) 349-8500.
What Requires a Permit in Denton
Permits Required
- New construction and additions
- Structural modifications (removing/adding walls, headers, beams)
- Electrical work beyond simple fixture swaps
- Plumbing rough-in or re-piping
- HVAC system replacement or new installation
- Roofing replacement
- Water heater installation
- Swimming pool construction
- Fences (new or replacement)
- Decks and patios with structural components
- Demolition
No Permit Needed
- Interior painting and wallpaper
- Flooring replacement (carpet, tile, hardwood)
- Cabinet replacement (same footprint)
- Replacing light fixtures, outlets, and switches (like-for-like)
- Minor landscaping
- Replacing faucets or toilets
- Window replacements (same size opening, no structural change)
Permit Fees
| Permit Type | City of Denton Fee |
|---|---|
| Residential fence | $25 |
| Re-roofing | $75 – $150 |
| Water heater replacement | $50 |
| HVAC replacement | $75 – $125 |
| Electrical (minor) | $50 – $100 |
| Plumbing (minor) | $50 – $100 |
| Residential addition | $300 – $1,500+ (based on valuation) |
| New construction | $1,500 – $5,000+ (based on valuation) |
| Swimming pool | $200 – $400 |
Fees are approximate and subject to change. Verify current fees at dentonpermits.com.
How to Apply
The City of Denton uses an online portal for most permit applications:
- Create an account at the City of Denton’s citizen portal
- Submit your application with required documents (site plan, construction drawings, scope of work)
- Pay fees online at submission
- Wait for review — simple permits are often same-day; complex projects go through plan review
- Schedule inspections as work progresses — the portal has online scheduling
For simple permits (water heater, HVAC swap, re-roof), you can often apply and receive approval the same day. Residential additions and new builds require plan review, which takes 2–6 weeks.
Need a Licensed Contractor?
Denton Home Services connects homeowners with licensed, insured contractors who handle their own permitting. No guesswork on your end.
Find a Licensed Contractor →Common Permit Mistakes
Hiring unlicensed contractors. In Denton, contractors performing work that requires a permit must hold the appropriate state license (plumbing, electrical, HVAC) or register with the city. If your contractor tells you a permit “isn’t necessary” for a job that clearly requires one, that’s a red flag.
Skipping inspections. Getting the permit is only half the process. Each permit type has required inspections at specific stages. Skipping inspections can result in failed final inspection, which becomes a title issue when you sell.
Not closing out permits. Open permits show up on title searches. If you pulled a permit three years ago and never got the final inspection, resolve it before listing your home. This is a common problem in Denton’s fast-growing neighborhoods like Robson Ranch and Harvest.
Bottom Line
For most Denton homeowners, the permit process is straightforward — especially for simple replacements like roofing, HVAC, and water heaters. The key is knowing what requires a permit, getting it before work starts, and following through with inspections. The $50–$150 permit fee is cheap insurance against the $2,000/day fines and title problems that come with unpermitted work.