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HVAC · Houston, TX · 2026 cost guide
How much does AC replacement cost in Houston, TX?
In the Houston-Pasadena-The Woodlands, TX area, replacing a central air conditioner runs about $4,950 to $10,800 installed in 2026, about 10% below the national range. Contractor labor here is indexed at 0.90 against the U.S. average, and that is what moves the numbers; equipment and materials cost about the same everywhere.
- Central AC
- $4,950–$10,800condenser and coil, installed
- Heat pump
- $6,300–$14,400heats and cools, installed
- AC + furnace
- $8,100–$18,000full split system
- Ductless mini-split
- $3,600–$12,600one to four zones
Replacing a central air conditioner in Houston typically costs $4,950 to $10,800 installed installed. With about 3,000 cooling degree days and a climate where dehumidification matters as much as tonnage, this is the metro where oversizing hurts most and where variable-speed equipment earns its premium. Winter is light, about 1,400 heating degree days, which tilts the heat pump versus gas furnace question toward the heat pump. Flooding, hurricanes, and the Houston Permitting Center's elevation rules add local wrinkles to the install.
What's different in Houston
Sizing in Houston is about moisture, not just peak heat. Climate zone 2A summers are hot, but the dew point is what makes a house feel bad, and an oversized unit that cools the air in ten minutes never runs long enough to dry it, so the house sits at 74 degrees and clammy. A Manual J calculation with the latent load done honestly, plus a two-stage or variable-speed system that runs long and slow, is the Houston answer. At about $0.155 per kWh from your retail provider over CenterPoint's wires, stepping from the 14.3 SEER2 minimum to 16 or 17 SEER2 pays back within the life of the unit.
Heat pump or gas furnace is an easier call here than in Dallas. Houston needs heat for a few weeks a year, and a standard heat pump handles a 35-degree morning without touching its strips, so most installers now recommend a heat pump unless you already have a good furnace and cheap gas. The February 2021 freeze is the counterargument people raise; a heat pump with working strip heat did fine, and the homes that suffered were the ones without power. Texas has no state tax credit, so ask the installer what CenterPoint or your retail provider is offering this season.
Permits and placement are the Houston specifics. The city has no zoning, but a change-out still needs a mechanical permit from the Houston Permitting Center, pulled by a TDLR-licensed contractor, and suburbs such as Pearland, Sugar Land, and Katy run their own offices. If your address is in a mapped floodplain, elevation rules may require the new condenser on a stand above the flood level; ask before the bid is written, because a stand and a longer line set change the price. Hurricane tie-down straps are cheap insurance, and a raised, level pad keeps the unit out of the standing water that follows any Houston downpour.
AC Replacement prices in Houston vs. the national guide
These are the ranges from our national AC replacement cost guide next to the same items scaled by the Houston, TX labor index of 0.90. Rows marked fixed are materials only and do not move with local labor.
| Item | National range | Houston, TX |
|---|---|---|
| Central AC | $5,500–$12,000 | $4,950–$10,800 |
| Heat pump | $7,000–$16,000 | $6,300–$14,400 |
| AC + furnace | $9,000–$20,000 | $8,100–$18,000 |
| Ductless mini-split | $4,000–$14,000 | $3,600–$12,600 |
Local tip: Ask every Houston bidder to show the latent load in their Manual J and to price a raised stand and hurricane straps as separate lines, so you can compare humidity control and flood protection, not just tonnage.
Houston at a glance
- Climate zone
- 2Ahot-humid
- Labor index
- 0.90vs. U.S. average 1.00
- Cooling degree days
- 3,000per year, base 65 °F
- Heating degree days
- 1,400per year, base 65 °F
- Min. AC efficiency
- 14.3 SEER2federal minimum for this region
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Is a heat pump a good choice in Houston?
Yes, for most homes. Houston averages about 1,400 heating degree days, so the heat pump spends almost all of its life cooling and dehumidifying, which it does as well as a straight air conditioner, and it covers the short winter without much strip heat. Keep a gas furnace only if it is newer and you want a backup for a freeze like February 2021, when the grid was the problem, not the equipment.
What size AC does a Houston home need?
Smaller than the old one, often. Houston installers replaced units for decades by matching tonnage, and many homes carry a half ton more than a Manual J supports. In a humid climate that extra capacity means short cycles and a clammy house. Ask for the load calculation, ask how the latent load was figured, and favor a two-stage or variable-speed unit that can run long on a muggy 85-degree day.
Do I need a permit to replace my AC in Houston?
Yes. Houston has no zoning, but the Houston Permitting Center requires a mechanical permit and inspection for a system change-out, pulled by a TDLR-licensed contractor. Outside the city limits, Harris County and cities like Pasadena and Sugar Land permit separately. If your home sits in a mapped floodplain, ask the office whether the new condenser must be elevated before you accept a bid.
How should a new condenser be mounted in a Houston floodplain?
On a stand or platform above the expected flood level, with the line set and disconnect routed accordingly and hurricane straps holding the unit down. The Houston Permitting Center sets the elevation for mapped floodplain neighborhoods, and the installer should know the number for your address. It costs more up front than a slab pad at grade, and it is the difference between a rinse and a replacement after the next flood.
AC Replacement costs in nearby metros
AC Replacement cost in Austin, TX
Austin-Round Rock-San Marcos, TX. Labor index 0.95, climate zone 2A.
Read the Austin guide → HVACAC Replacement cost in San Antonio, TX
San Antonio-New Braunfels, TX. Labor index 0.85, climate zone 2A.
Read the San Antonio guide → HVACAC Replacement cost in Dallas, TX
Dallas-Fort Worth-Arlington, TX. Labor index 0.90, climate zone 3A.
Read the Dallas guide → HVACAC Replacement cost in St. Louis, MO
St. Louis, MO-IL. Labor index 1.05, climate zone 4A.
Read the St. Louis guide →