Hiring an HVAC Company in Katy, TX

Confirm the contractor's TDLR license first

Every business that installs, services, or repairs air conditioning, refrigeration, or heating equipment in Texas must hold a current Air Conditioning and Refrigeration Contractor (ACR) license issued by the Texas Department of Licensing and Regulation. This is a statewide requirement that applies the same way whether you live inside the City of Katy or in unincorporated Fort Bend County.

Before you agree to anything, ask the company for its TDLR license number and the name of the licensed contractor associated with that business location, then check it yourself on TDLR's public license search tool. This takes only a couple of minutes and confirms the license is active rather than expired or revoked.

Technicians who show up to do the actual work should also be TDLR-registered or certified AC technicians working under that licensed contractor. If a company can't produce a license number when asked, treat that as a serious warning sign and keep shopping.

Ask which permit office covers your address

Because the Katy area spans the City of Katy plus parts of Harris, Fort Bend, and Waller counties, the correct permitting authority for your HVAC replacement depends entirely on your specific street address, not on whether your mail says "Katy, TX."

A good local contractor should be able to tell you immediately whether your job needs a City of Katy mechanical permit, a Harris County ePermits application, or a Fort Bend County permit, and should factor the permit fee and inspection timeline into their quote.

If a contractor tells you no permit is needed for a full system replacement, verify that yourself by checking with the applicable jurisdiction. Skipping a required permit can create problems later with insurance claims or when you sell the home.

Compare quotes on equal terms

Get at least two or three written quotes for the same scope: identical equipment tonnage and efficiency rating (SEER2 rating), the same warranty terms, and clarity on who pulls and pays for the permit.

Watch for quotes that are dramatically cheaper than the others; that's often a sign of an undersized system, skipped permit, or lower-tier equipment substituted without your knowledge.

Ask each contractor to walk you through their load calculation methodology (ideally a Manual J calculation) rather than simply matching the tonnage of your old unit, since Katy's long humid cooling season makes correct sizing especially important for both comfort and equipment lifespan.

Understand what's included and what isn't

A written proposal should spell out equipment model numbers, labor, permit fees, disposal of the old unit, ductwork work included (if any), and the manufacturer and labor warranty terms separately.

Ask directly whether the quote includes bringing your electrical disconnect, condensate drain, and any required code items up to current standards, since older Katy-area homes sometimes need small electrical or drainage updates alongside a system swap.

Confirm start and completion dates in writing, especially during peak summer months when scheduling backlogs are common across the greater Houston area.

Next steps

Once you've verified licensing and confirmed the correct permitting authority, request itemized quotes from a few licensed local companies and compare them using the categories above.

For a broader look at what repairs and replacements typically cost in the Katy area, see the AC repair cost guide and HVAC replacement cost guide.

You can also review the full Katy HVAC hub page for permit and licensing details, or get matched with local HVAC pros serving the Katy area.

Vetting a company when your address spans three counties

Because the Katy area sits across Harris, Fort Bend, and Waller counties, plus the small incorporated City of Katy itself, a company that says it "works in Katy" may only be set up to pull permits correctly in one of those jurisdictions. Before you sign a contract, ask the contractor to name the specific permitting authority for your address — the City of Katy Permit & Building Services Division for addresses inside city limits, the Harris County Engineering Department's Permits Division for unincorporated Harris County, the Fort Bend County Engineering permits office for unincorporated Fort Bend County, or the Waller County Engineer's Office for unincorporated Waller County. A contractor who has done recent work in your specific jurisdiction will know that office's inspection scheduling, fee schedule, and typical turnaround, which can shave days off your project timeline.

It's also worth asking how long the company has operated under its current name and TDLR license number, since the Katy submarket has seen a steady churn of small outfits that open, get a handful of one-star reviews for no-show appointments or unfinished punch lists, and close within a couple of years. A company with several years of continuous TDLR licensing history and a stable local address is generally a safer bet than one with a brand-new license number and no verifiable physical presence in the Katy, Cinco Ranch, Fulshear, or Brookshire area.

Finally, ask whether the technician assigned to your job carries their own TDLR registration or works under the license of the company's Responsible Master Plumber-equivalent for air conditioning, which TDLR calls the licensed contractor of record. Texas law allows unlicensed apprentices and trainees to work under direct supervision, but the company should be able to tell you, without hesitation, who the licensed individual responsible for your job is and provide that person's TDLR number on request.

Insurance, warranties, and contract terms worth checking

Ask any Katy-area contractor for proof of general liability insurance and, if they'll have employees on a ladder or in your attic, workers' compensation coverage. Attic work in Katy's climate is not trivial: attic temperatures in the Katy area regularly exceed 130 degrees Fahrenheit during summer afternoons, and a legitimate company will have safety protocols and insurance that cover a technician working in that environment, not just a certificate they show once and never renew.

Get the manufacturer's equipment warranty terms and the contractor's labor warranty in writing before work begins, and confirm whether the equipment warranty requires online registration within a set number of days of installation — most major manufacturers require registration within 60 to 90 days or the warranty defaults to a shorter base period. In a market with as much new-construction and post-storm replacement activity as Katy, it is common for homeowners to discover years later that a previous contractor never registered the unit, leaving them with a much shorter warranty than they assumed.

If your project needs a permit, do not accept a verbal assurance that "we'll take care of it" as sufficient. Ask for the permit number once it's pulled and confirm you can look it up on the relevant jurisdiction's public permit portal; the City of Katy, Harris County, and Fort Bend County all provide searchable online permit records. A contractor who resists giving you a permit number to verify is one of the clearest warning signs in this market, since unpermitted mechanical work can complicate a home sale or insurance claim later on.

Typical cost ranges

Ranges are general estimates gathered from homeowner-reported quotes, not an offer or a quote for your project.

Common questions

More on this market

Local cost ranges, seasons, permits and licensing for this city live on the market page.

Sources

• TDLR Air Conditioning and Refrigeration Contractors program
• TDLR license search tool
• City of Katy Permit & Building Services Division

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