Free tool

Houston HVAC cost calculator

Ranges for common AC repairs and for full system replacement in the Houston area. It asks nothing about you, the estimate updates as you change the options, and the sources behind the numbers are listed further down the page.

Talk to a technician How these numbers were built

What are you pricing?

Repair Replacement

What is being repaired? If a technician has already named the part, pick it. If not, choose the first or second option.

When does it need doing? After-hours, weekend and holiday work carries a premium across the trade.

Where is the indoor unit? Attic work takes longer than working at ground level.

Methodology

Where these numbers come from

Last updated: September 2026.

Every range in this calculator traces to published cost data, either from Houston-area contractors publishing their own pricing or from national cost datasets for 2026. Nothing here is invented, and where an input could not be supported by data it was removed rather than estimated.

Repair ranges

Repair figures come from national 2026 cost data for the specific job. Capacitor replacement is drawn from published ranges covering the part, labour and the diagnostic charge. Compressor and evaporator coil figures reflect out-of-warranty replacement including refrigerant recovery and recharge. Blower motor figures are split by motor type, since a single-speed PSC and a variable-speed ECM are genuinely different costs rather than a market spread. Diagnostic and service call fees reflect typical Houston-area practice.

Replacement ranges

Replacement figures are anchored on two things. One Houston contractor publishes flat-rate system pricing running from about $9,999 for a two ton system to $12,699 for a five ton, including removal of the old equipment and installation. Broader cost data for the Houston metro places full HVAC replacement in the region of $7,500 to $14,000 depending on scope and equipment, with high-efficiency variable-speed systems above that. The ranges here bracket both.

The two adjustments that are assumptions

Two multipliers in this tool are not taken from a published dataset, and it is only fair to say so plainly.

After-hours work is adjusted upward by 25 percent. It is well established across the trade that unscheduled out-of-hours labour costs more. The specific percentage is a reasonable assumption rather than a measured figure.
Attic equipment is adjusted upward by 10 percent. Attic work genuinely takes longer than working at ground level. Again, the specific figure is an assumption.

Equipment tier multipliers for two-stage and variable-speed systems are similarly directional rather than precise, because tier pricing is not published in a consistent, comparable form. They reflect the documented fact that staging and efficiency raise cost.

What this deliberately does not do

It does not ask for your name, email address, phone number or postcode. It does not produce a figure to the dollar. It does not include commercial work, which varies too much to range meaningfully. And it does not adjust for brand, because equipment pricing by brand is not published in a form that would support it.

The full source list, with URLs and dates accessed, is kept in the project documentation as HVAC_COST_METHODOLOGY.md and is updated when the underlying data is reviewed.

Using the numbers

What to do with a range once you have one

Sanity-check a quote

If a quote sits far below the range, ask what is not included. If it sits far above, ask what is included that you had not accounted for. Both questions are reasonable and both get answered by any legitimate contractor.

Compare repair against replacement

Price the repair, then price the replacement, and look at them together. A compressor at the top of its range against a system replacement at the bottom of its range is a very different decision from the reverse.

Decide whether it is worth a visit

Sometimes the useful outcome is realising the likely cost is lower than feared, and that a diagnosis is worth booking rather than putting off through another summer.

Worth remembering: on any repair over roughly a thousand dollars, asking what specific readings led to the diagnosis is a fair question, and getting a second opinion is normal rather than insulting.

The variables this cannot see

What moves a real quote away from a range

A calculator works from categories. A quote works from your house. The gap between them is made up of things nobody can capture in three dropdowns.

What the technician finds. A capacitor replacement on a system with a badly corroded contactor and a dirty condenser coil is not the same job as a capacitor replacement on a clean system.
Access. A low attic with no decking, a condenser wedged against a fence, or an air handler in a closet with no working room all add time.
Part availability. Some brands and some ages of equipment have parts on the shelf. Others involve a wait and a special order.
Warranty status. The single biggest swing factor on coil and compressor jobs. Registered equipment inside its parts warranty can halve a bill.
Duct condition. On a replacement, whether the existing duct is sound or needs correcting can move the total by thousands. See ductwork.
What the house actually needs. A load calculation sometimes shows the existing system was the wrong size all along, which changes the conversation entirely.

Turning a range into a number

The only thing that does that is somebody looking at the system. What you get from a call is a straight answer about what is likely, what it will cost to find out, and whether it needs doing today.

Call (866) 427-9264

24/7 emergency HVAC service. Office monday - saturday, 9:00am - 6:00pm.

Based on Murphy Road in StaffordNot a call centre routing your job to whoever is free. The office sits between Sugar Land, Missouri City and the Southwest Freeway.

24/7 emergency HVAC serviceCooling failures do not wait for business hours. Office hours are Monday to Saturday, 9am to 6pm.

HVAC, construction and electrical under one roofWhen a cooling problem turns out to be a duct route, a return opening or a circuit, it does not become somebody else’s job.

You get a phone call, not a formThere is no contact form on this site on purpose. Describe the symptom, get an answer, book the visit.

AC repair

What the diagnostic visit actually covers.

AC replacement

Sizing, permits, refrigerant rules and what drives price.

Compressor replacement

The repair where this comparison matters most.

Evaporator coil replacement

The other big repair-or-replace decision.

Refrigerant leak repair

Why recurring recharges have got more expensive.

HVAC maintenance

The spending that prevents some of the above.

Calculator questions

Why is the estimate a range rather than a number?

Because a number would be false precision. Two houses needing the same nominal repair can differ by hundreds of dollars depending on access, equipment brand, part availability and what else is found once a panel comes off. A range built from published data is honest. A specific figure generated from three dropdown answers is not.

Do I have to give my details to see the estimate?

No. There is no form on this page and nothing is collected. The calculation runs entirely in your browser and nothing is sent anywhere. If you want an exact figure, that comes from a diagnosis, and you can call when you are ready.

How accurate is this for my house?

Treat it as a sanity check rather than a quote. It is useful for knowing whether a quote you have been given is in a normal range, for deciding whether a repair is worth pursuing, and for comparing repair against replacement. It cannot account for your specific equipment, your attic, or what a technician finds on the day.

Why does replacement cost more than it did a few years ago?

Two regulatory changes account for a lot of it. Minimum efficiency standards rose in 2023, with Texas requiring 14.3 SEER2 on split systems under 45,000 BTU/h. And from January 2025 manufacturers stopped producing residential split systems using R-410A under the EPA’s AIM Act phase-down, moving to lower-GWP refrigerants such as R-454B and R-32, which require additional safety components in the equipment. Both raised equipment costs.

Should I just get the cheapest quote?

Compare what is in each quote before comparing the totals. A quote that omits new plenums, a proper drain assembly and float switch, a matched indoor coil, or the mechanical permit is not cheaper, it is smaller. The permit in particular matters, because unpermitted work becomes a problem when the house is sold.

A range is a starting point. A diagnosis is the number.