Permit guide
Killeen HVAC Permit Guide: When AC Work Needs a City Permit
In Killeen, changing HVAC equipment (the furnace, evaporator, condenser or duct work) needs a City mechanical permit. The 2026-2027 fee schedule lists it at $50 per unit for residential work, and the City says HVAC changeouts are generally approved in three days. Read from the City’s own documents on November 11, 2026.
Published November 11, 2026 · Figures and rules checked against the sources listed at the end of this page.
What needs a mechanical permit
The City of Killeen’s handout “Projects That Require a Permit” (dated September 19, 2024) lists under Mechanical: “Changing the HVAC equipment (such as the furnace, evaporator, condenser and/or duct work).” It adds a note that duct work requires proof of a duct leakage or tightness test by the installer.
The handout does not list routine repairs such as replacing a capacitor or clearing a drain line. If you are not sure which side of the line a job falls on, the City asks you to call the permit clerks at 254-501-7762 or email buildingpermits@killeentexas.gov rather than guess.
What it costs
| Fee | Unit | Amount |
|---|---|---|
| Mechanical (includes condenser and furnace replacement) | Per unit | $50 |
| Plan review (applies when two or more permit types are requested at the same time) | Per review | $90 |
Source: City of Killeen, “2026-2027 Permit Fees”, Development Services – Building & Inspection, Residential Remodel, Repair and Improvements. Read November 11, 2026.
Who can pull the permit
- Contractors registered with the City of Killeen. The handout lists mechanical contractors among those who may apply.
- Homeowners doing their own work on a property listed as their homestead. The handout states that rental property does not apply.
City registration is separate from the state license. Texas requires an air conditioning and refrigeration contractor license for this work; check it with TDLR as well.
How to apply and how long it takes
- The City manages permits and inspections through its online portal, MGO Connect. The Building Inspections page links the portal and a guide to creating an account.
- The contractor (or the homesteading homeowner) applies for the mechanical permit and pays the fee.
- The handout says re-roofs, water heaters, HVAC changeouts and similar jobs are generally approved in three days; projects that need a plans review normally take up to ten.
- Inspections are requested through the same portal.
Why it is your business even if the contractor applies
The City’s handout is direct about this: a registered contractor will normally know if a job needs a permit, but as the property owner it is your responsibility to make sure the work is completed under the City’s construction regulations, and you should not assume the permit was handled. Ask to see it before the old unit comes out.
Outside the Killeen city limits. This guide covers the City of Killeen only. We have not read the permit rules for Harker Heights, Copperas Cove or Nolanville. Check with the city the house is in. Some lines on Killeen’s fee schedule carry a footnote mark we have not read, so confirm the amount with the permit clerks.
Sources and dates
Every figure and rule above names where it came from and the date it was read. Price ranges are national guides; a written quote for your own system is the real number. For permit and license rules, the City and TDLR have the last word. Prices are rechecked at least every six months.
- City of Killeen, “Projects That Require a Permit” (handout dated September 19, 2024) — read November 11, 2026
- City of Killeen, “2026-2027 Permit Fees” (FY 27 Fee Schedule) — read November 11, 2026
- City of Killeen, Building Inspections — read November 11, 2026
- Texas Occupations Code, Chapter 1302 (Air Conditioning and Refrigeration Contractors), §§1302.002, 1302.053, 1302.251 — read November 11, 2026