What needs a permit
From the City's HVAC / Furnaces page (read 23 October 2026):
| Job | Permit in Denton |
|---|---|
| Repairing or replacing an AC, heat pump or furnace | Mechanical permit |
| Adding a new HVAC system or furnace | Mechanical permit with "plan review with adherence to international energy codes" |
| Mechanical work that is part of a remodel | Included in the alteration permit |
| Self-contained refrigeration systems with 10 lb (4.54 kg) of refrigerant or less, or motors of 1 hp (746 W) or less | No permit |
Note the word repair: Denton's page puts repair and replacement in the same sentence, so a compressor or coil job is not automatically exempt. The application asks you to pick one scope: New Installation, Replacement in Same Location with like equipment, Replacement in Same Location with different equipment, Relocation, or Repair.
Who can pull it
A mechanical contractor registered with the City. Denton's Contractor Registration lists a free mechanical registration requiring a government-issued photo ID, "Liability Insurance (liability insurance must list City of Denton as the certificate holder)", a "Current Texas Mechanical License" and a list of authorized personnel. Texas licenses A/C contractors through TDLR; check the number on the TDLR License Search. 68.1% of Denton HVAC firms in our file matched an active TDLR license and 29.6% had no match by name. The City's pages we read do not describe a homeowner permit for HVAC work; call Building Safety on (940) 349-8600 first.
How to apply and get inspected
- Apply in eTRAKiT, or on the paper MEP Application at the Development Services Center, 401 N Elm Street. Use the Notes section if the description field is too short; "Applications that do not specify the scope of work may experience processing delays."
- Mechanical final. The only inspection on the HVAC page. The City's Inspections List describes it as "all HVAC units installed, startup complete, etc."
- Scheduling rules. Requests made by 5:59 a.m. are done that business day. Cancel by calling (940) 349-8600 before 9 a.m., or a re-inspection fee applies; unpaid fees must be paid before the final is approved. A permit expires 180 days after issue unless an inspection renews it (FAQs).
What it costs
| Fee | Amount | Source |
|---|---|---|
| HVAC or furnace permit | "$50 each unit" | HVAC / Furnaces |
| MEP Flat Fee (service update, water heater, mechanical) | $50 | Fee schedule, Table 3 |
| Re-Inspection Fee | $75 | Table 6 |
| Inspection after hours, per hour, two-hour minimum | $303 | Table 6 |
| Working without a Permit | $453 | Table 6 |
The fee schedule is effective 1 October 2026 (Ordinance 26-1576). Read together, a split system with an outdoor and an indoor unit may be priced as two units; the page does not define a unit, so the eTRAKiT invoice is the final word. Either way the permit is well under 1% of the usual $12,600 job.
What 2,360 Denton HVAC permits show
| Measure | Denton HVAC |
|---|---|
| Permits on homes, October 2023 to September 2026 | 2,360 |
| Firms | 216 |
| Firms with a permit in the 12 months to September 2026 | 138 |
| Usual filed value | $12,600 |
| Middle half of firms' usual value (3+ permits) | $10,000 to $14,822 |
| Finaled (a year or more old) | 89.3% |
| 10th / 90th-percentile firm's finaled share (10+ permits) | 70.4% / 96.4% |
| Firms with a single permit | 100 (46.3%) |
| Busiest / quietest month | July (index 155) / November (53) |
Denton's HVAC year is lopsided: filing in July runs at 155 on our index (100 is an average month) against 53 in November, nearly three to one. A planned replacement booked in the off season competes with far fewer jobs. The market is spread out (14.3% for the busiest firm) and nearly half the firms (46.3%) filed a single Denton permit, so ask any firm for its recent Denton addresses. Prices by home value: Denton HVAC cost; national ranges: HVAC replacement cost; counts by year: Denton permit statistics.
See every Denton HVAC contractor by permits finaled →
Before you hire
Check the TDLR license and the City registration with the Denton contractor license lookup, then compare firms on the Denton HVAC list. Rules elsewhere: do I need a permit for HVAC replacement. Past permits on your address: Denton building permit search.
What this does not tell you
Denton's yearly permit files have no completion date, so we show finaled share but not days to final. Filed values are what the applicant entered. Our license match is by company name, so an unmatched firm is not necessarily unlicensed.
How we know this
Permit scope, exemptions and the per-unit fee are quoted from the City of Denton's HVAC / Furnaces page; other fees from its Permit and Fee Schedule effective 1 October 2026; the final from its Inspections List; registration from its Contractor Registration page; expiry from its Development Services FAQs, all read 23 October 2026. Our counts are City of Denton mechanical permits on homes, October 2023 to September 2026.
Numbers come from City of Denton Building Safety permits on homes (the city's yearly permit reports), data through October 18, 2026. Nobody paid to be on this page and nobody can.
Questions
- Do I need a permit to replace my AC in Denton?
Yes. The City's HVAC / Furnaces page says repair or replacement of HVAC or a furnace requires a permit, and adding a new HVAC or furnace requires plan review against the energy codes. Only small self-contained refrigeration units are exempt.
- How much is an HVAC permit in Denton?
$50 per unit. The City's HVAC page lists $50 each unit, and the fee schedule effective 1 October 2026 lists a $50 MEP flat fee for mechanical work. A failed or uncancelled inspection adds a $75 re-inspection fee.
- Who can pull an HVAC permit in Denton?
A mechanical contractor registered with the City, which takes a current Texas mechanical license, photo ID and liability insurance naming the City of Denton as certificate holder; registration is free. The City's pages do not describe a homeowner route; ask Building Safety on (940) 349-8600.
- What inspection does an AC replacement need in Denton?
A mechanical final. The City's Inspections List describes it as all HVAC units installed and startup complete. Book it in eTRAKiT; requests made by 5:59 a.m. are done that day.
- How much does a new AC system cost in Denton?
The usual Denton HVAC permit in our file carried a filed value of $12,600; the middle half of firms' usual jobs ran $10,000 to $14,822.
Build your own list
Every firm with that kind of permit on record. Pick what you value. The list moves.
Related guides
- Ames building permit search: how to look up permits on an address
- Do I need an HVAC permit in Ames? Yes: what is exempt, homeowner permits, the $56.23 base fee and inspections
- Do I need an HVAC permit in Anaheim? The mechanical permit for a furnace or AC change-out, fees and inspections
- Do I need an HVAC permit in Arlington, VA? The like-for-like exemption, the gas exception and zoning
- Do I need an HVAC permit in Nashville? What Metro's gas/mechanical permit covers
- Do I need an HVAC permit in Orlando? The mechanical permit, the $15,000 notice rule, fees and inspections
For one city
- HVAC / Furnaces — City of Denton, TX (accessed 2026-10-23)
- Permit and Fee Schedule, effective October 1, 2026 (Ordinance 26-1576) — City of Denton Development Services (accessed 2026-10-23)
- Inspections List — City of Denton Building Safety (accessed 2026-10-23)
- Contractor Registration — City of Denton (accessed 2026-10-23)
- Development Services FAQs — City of Denton (accessed 2026-10-23)
- City of Denton eTRAKiT (2026-10-23)
- License Search — Texas Department of Licensing and Regulation (2026-10-22)