What needs a mechanical permit in Waco
From the City's Do I Need a Permit? page (read 23 October 2026):
| No permit | Residential Mechanical permit | Repairs and Alterations permit |
|---|---|---|
| "Minor mechanical (heating/cooling/ventilation) repairs, including the routine replacement of filters" | Installing or changing out a heater or air conditioner, including ductwork | "More extensive work", "including any trade work", as part of a remodel |
So a like-for-like condenser or furnace swap is permit work in Waco, not a repair. The City builds to the currently adopted International Residential Code, International Energy Conservation Code and Chapter 6 of its Code of Ordinances. Applications follow the City's electrical, irrigation and mechanical checklist. A gas furnace on a new gas line also needs Waco's separate gas permit.
Who can pull it
A licensed HVAC contractor registered with the City. Texas licenses air-conditioning and refrigeration contractors through TDLR; check the number on the TDLR License Search, which lists active licenses only. To register in Waco a contractor emails permits@wacotx.gov its state license, the license holder's driver's license and a certificate of insurance naming the City; there is no fee (Registering & Applying). 74.6% of Waco HVAC firms in our file matched an active TDLR license, and 20.9% had no match by name.
You, on your homestead. The work "requires a licensed HVAC contractor, unless a homestead owner is doing the work themselves on their homesteaded property." The City's residential checklist asks for the owner's driver's license, with name and address matching the McLennan County Appraisal District record.
How to apply and get inspected
- Apply in the City's Citizen Self Service portal.
- Request each inspection online by 4 p.m. the day before; the required inspections are listed on the permit in order, and "Contractors must be registered and use the Citizen Self Service Portal to schedule inspections" (Inspection Procedures).
- Fix every comment before the reinspection. A fee applies from the third visit. The procedures site also covers "occupied and down" inspections when a home is without heat or air. Inspection Services: (254) 750-5612.
What it costs
From the mechanical section of the City's fee schedules (read 23 October 2026):
| Fee line | Amount |
|---|---|
| Mechanical Administration Fee | $60 |
| Technology Fee, mechanical | $15 |
| Heating, each unit up to 250,000 BTU | $20 |
| Refrigerated air, each unit up to 5 tons | $20 |
| Refrigerated air, each air handler up to 10,000 CFM | $5 |
| Flex duct / metal duct | $25 / $50 |
| Single-zone mini split / each additional zone | $20 / $3 |
| Standalone mechanical permit review (residential or commercial) | $60, non-refundable |
| Permit renewal | 50% of original fee, $60 minimum |
| Failed reinspection: 1st / 2nd / 3rd or later | $55 / $100 / $150 |
By our arithmetic a split system swap (one heating unit, one condenser, one air handler) is $60 + $15 + $20 + $20 + $5 = $120, plus duct if it is replaced; whether the $60 review fee also applies to a simple change-out is not stated. The portal invoice is the final word.
What 2,244 Waco HVAC permits show
| Measure | Waco HVAC |
|---|---|
| Permits on homes, October 2023 to September 2026 | 2,244 |
| Firms | 134 |
| Firms with a permit in the last 12 months of the window | 81 |
| Finaled (permits a year or more old) | 94.1% |
| Usual days from issue to final | 108 |
| Share of permits held by the busiest firm / five busiest | 22.3% / 55.2% |
| 10th / 90th-percentile firm's finaled share (10+ permits) | 79.3% / 99.1% |
| Firms with a single permit | 54 (40.3%) |
| Busiest / quietest month | July (index 124) / December (75) |
Waco HVAC permits close: 94.1% finaled, and even the 10th-percentile busy firm reached 79.3%. The risk sits with the long tail: 54 firms filed a single Waco HVAC permit in three years, so there is no local record to judge them by. Filing in July runs at 124 on our index against 75 in December, so a replacement booked before summer competes with fewer jobs. Waco's trade permits carry no job value; national prices are in HVAC replacement cost. Counts by year: Waco permit statistics.
See every Waco HVAC contractor by permits finaled →
Before you hire
Check the TDLR license with the Waco contractor license lookup, then compare firms on the Waco HVAC list. Rules elsewhere: do I need a permit for HVAC replacement. Past permits on your address: Waco building permit search.
What this does not tell you
Unpermitted change-outs leave no record. Days to final count open permits as unfinished. Our license match is by company name. The fee page carries no effective date and does not say how lines combine on one permit.
How we know this
Permit scope, the homestead rule and code basis are quoted from the City of Waco's Do I Need a Permit? page; homestead documentation from its Building Residential checklist; fees from its Fee Schedules page and inspection rules from its Procedures page, all read 23 October 2026. The fee example is our arithmetic. Permit counts are City of Waco mechanical permits on homes, October 2023 to September 2026, with the mechanical contractor from each permit's contact list; finaled share uses permits a year or more old.
Numbers come from City of Waco EnerGov building, electrical, plumbing and mechanical permits on homes (the city's June 9, 2026 permit extract, updated to October 22, 2026 from the city's Citizen Self Service permit search), with the contractor taken from each permit's public contact list on that site, data through October 22, 2026. Nobody paid to be on this page and nobody can.
Questions
- Do I need a permit to replace my AC in Waco?
Yes. Waco says heater or air conditioning unit installations or changeouts, including ductwork, require a Residential Mechanical permit. Only minor repairs, such as routine filter replacement, are exempt.
- How much is an HVAC permit in Waco?
The City's fee schedule lists a $60 Mechanical Administration Fee and a $15 technology fee, plus $20 per heating unit up to 250,000 BTU, $20 per refrigerated-air unit up to 5 tons, $5 per air handler up to 10,000 CFM, and $25 for flex duct or $50 for metal duct. A single-zone mini split is $20.
- Can a homeowner pull an HVAC permit in Waco?
Only on their own homestead, doing the work themselves; otherwise the work requires a licensed HVAC contractor. The City asks for the owner's driver's license, matching the McLennan County Appraisal District homestead record.
- How long does an HVAC permit take to close in Waco?
Inspections must be requested online by 4 p.m. the day before. In our file the usual Waco HVAC permit finaled 108 days after issue, and 94.1% of those a year or more old finaled.
- When is HVAC season for permits in Waco?
Summer. Waco HVAC permit filing peaks in July at 124 on our index (100 is an average month) and is lowest in December at 75.
Build your own list
Every firm with that kind of permit on record. Pick what you value. The list moves.
Related guides
- Waco building permit search: how to look up permits on an address
- 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
For one city
- Do I Need a Permit? — City of Waco Inspection Services (accessed 2026-10-23)
- Fee Schedules — City of Waco Inspection Services (accessed 2026-10-23)
- Inspection Procedures — City of Waco Inspection Services (accessed 2026-10-23)
- Submission Checklists: Electrical, Irrigation, & Mechanical — City of Waco (linked 2026-10-23)
- Submission Checklists: Building Residential — City of Waco (accessed 2026-10-23)
- Registering & Applying for a Permit — City of Waco Inspection Services (2026-10-21)
- Citizen Self Service — City of Waco (2026-10-23)
- License Search — Texas Department of Licensing and Regulation (2026-10-23)