What's Required in Dallas
- Like-for-like replacement of electric HVAC equipment with no rough-in change needs no permit.
- Gas furnace replacement needs a Residential Mechanical Permit.
- New or rerouted ductwork needs a mechanical permit and a duct blaster performance test.
- Gas piping changes need a plumbing permit from a registered Master Plumber.
- HVAC contractors must hold a TDLR license and be registered with the City of Dallas.
- Homestead owners may do their own mechanical work if the homestead is recorded with the appraisal district.
- Plumbing and mechanical rough and final inspections must be scheduled on the same day.
- A third-party energy code provider may be needed for new heating, cooling and duct systems.
Do you need a permit to replace an AC or heat pump in Dallas?
Often not, and that surprises people. Chapter 52 Section 301.2.3 of the Dallas City Code lists mechanical work that needs no permit, and item 8 is the replacement of permanent electric heating, ventilating or air-conditioning equipment where no change in rough-in is required. A like-for-like swap of an electric AC condenser, heat pump or electric air handler that reuses the existing ductwork, refrigerant line route, condensate line and electrical supply fits that description. Replacing component parts that do not alter the original design, adding or relocating duct outlets in a single-family home up to $500 of work, and installing bathroom and kitchen exhaust fans are also exempt.
Change the rough-in and you need a Residential Mechanical Permit: new or rerouted ductwork beyond that $500 outlet allowance, a new circuit or disconnect, a relocated unit, or a system where none existed. Gas furnaces are treated differently. The code exempts only maintenance or repair of a gas furnace with no change in ducts, flues, electrical, plumbing or gas rough-in, so replacing a gas furnace is not on the exempt list and needs a permit; gas piping work is permitted through the plumbing trade.
How much does an HVAC permit cost in Dallas?
Texas law bars value-based residential fees, so the size of the system does not change the city fee. Chapter 52 Table B-II prices alterations and repairs of single-family homes at $181 per dwelling unit, and the fee schedule effective July 1, 2025 adds a $125 inspection fee per trade and a $15 technology fee.
- Mechanical permit for a gas furnace or new system: $181 + $125 + $15 = $321.
- Adding a plumbing trade for gas piping: $181 + $250 + $15 = $446.
- Planned development, specific-use-permit or deed-restricted lot: add 10 percent of the permit fee.
New heating, cooling and duct systems also fall under the energy code: the city’s remodel form says a duct blaster performance test is required and a certified third-party energy code provider may be needed, which is a private cost on top of the city fees.
| What you are doing | City filing | Rule |
|---|---|---|
| Like-for-like electric AC or heat pump swap | No permit | Chapter 52 Sec. 301.2.3, item 8, no rough-in change |
| Replacing a capacitor, motor or control board | No permit | Component replacement, item 2 |
| Replacing a gas furnace | Residential Mechanical Permit | Only gas furnace maintenance or repair is exempt |
| New or rerouted ductwork | Residential Mechanical Permit | Change in rough-in; duct blaster test |
| Adding a duct outlet, under $500 of work | No permit | Single-family duct outlet exemption, item 9 |
| New gas line to the furnace | Residential Plumbing Permit | Registered Master Plumber |
| Homeowner replacing their own system | Mechanical permit without license | Homestead recorded with the appraisal district |
Who can do HVAC work in Dallas?
Texas Occupations Code 1302.251 requires an air conditioning and refrigeration contractor license, and the city requires HVAC contractors to hold a TDLR license and register through DallasNow. Section 1302.053 exempts a person working on a building they own solely as their home, and the city’s mechanical-permit-without-license checklist accepts that only for a homestead recorded by the appraisal district. Exempt or not, the work still needs any permit and inspection the city requires. Since June 1, 2026, plumbing and mechanical rough and final inspections must be scheduled together.
How to Get a HVAC Permit in Dallas
Check the rough-in
An electric unit swapped in place on the same ducts, lines and circuit needs no permit; anything else, or any gas furnace replacement, does.
Hire a licensed contractor
Use a TDLR-licensed air conditioning contractor registered with the city, or file as a homestead owner without a license.
Apply in DallasNow
File a Residential Mechanical Permit, add a plumbing trade for gas work, and pay the $15 technology fee.
Pay permit fees
Pay the $181 base and $125 per trade inspection fees when invoiced; the permit issues after payment.
Schedule inspections together
Book plumbing and mechanical inspections on the same day, and arrange the duct test and energy code sign-off where required.