HVAC Replacement Cost Guide for Austin, TX (2026)
A full HVAC replacement in the Austin metro typically runs $4,700 to $14,500 depending on equipment type, from a condenser-only swap up to a full heat pump conversion with ductwork changes. This guide walks through what drives that range, what permits and rebates apply, and how Austin's climate and older housing stock should shape your equipment choice. For the full local hiring picture, see the Austin HVAC hub.
By Jason Green · HVAC · Published September 7, 2026 · Updated September 7, 2026 · 8 min read
What a new system costs in Austin
A straightforward condenser-only replacement, keeping the existing air handler and ductwork, typically runs $4,700 to $8,200 in the Austin metro. A full split system replacement including a new furnace or air handler runs $6,800 to $12,500, and heat pump installs or conversions typically run $7,200 to $14,500 depending on ductwork changes needed.
Homes with hill country limestone in West Austin and parts of Circle C sometimes see higher installation costs when new refrigerant line sets or ground work are required, since trenching through rock is more labor-intensive than in softer soil areas.
Choosing between a straight AC system and a heat pump
Given Austin's mild winters and long cooling season, heat pumps have become an increasingly popular choice, since a single system handles both heating and cooling efficiently rather than pairing an AC with a separate gas furnace. Ask a licensed contractor to run a load calculation on your specific home rather than assuming a heat pump is a drop-in swap for existing ductwork.
New equipment sold today generally uses R-454A or R-454B refrigerant rather than the older R-410A, as part of the federal refrigerant phasedown, and your contractor should confirm their technicians are trained and certified on whichever refrigerant your new system uses.
Permits, rebates, and paperwork
Any HVAC replacement inside Austin city limits requires a mechanical permit through the Austin Build + Connect portal, and a final inspection once the new equipment is installed 1. Confirm in writing that your contractor will pull the permit rather than assuming it is included in the quote.
Austin Energy offers a rebate averaging around $800 for a qualifying energy-efficient AC or heat pump installed by a participating contractor, with additional incentives available through the Home Energy Savings whole-home program 5. Confirm current rebate amounts and eligibility directly with Austin Energy since programs and funding levels change year to year.
Sizing the job to your home
Many homes in older central neighborhoods like Hyde Park, Tarrytown, and Mueller's renovated bungalows have ductwork sized for equipment from decades ago. A reputable contractor should perform a Manual J load calculation before recommending equipment size, rather than simply matching tonnage to the old unit, since an oversized system can short-cycle and an undersized one will run constantly without keeping up on 100-degree days.
Get two or three written estimates before committing to a replacement, and make sure each lists the same details: equipment brand, model, SEER2 rating, refrigerant type, ductwork scope, and permit responsibility. Our guide on how to choose an HVAC company in Austin covers how to compare bids side by side.
Ready to get quotes on your replacement? Get matched with vetted HVAC contractors near 78704.
Typical cost ranges
| Condenser-only replacement | $4,700 - $8,200 |
| Full split system replacement | $6,800 - $12,500 |
| Heat pump install or conversion | $7,200 - $14,500 |
| Ductwork repair or resizing | $1,500 - $6,500 |
| Smart thermostat upgrade | $120 - $350 |
Ranges are general estimates gathered from homeowner-reported quotes, not an offer or a quote for your project.
Common questions
How much does a full HVAC replacement cost in Austin?
A full split system replacement, including a new furnace or air handler, typically runs $6,800 to $12,500 in the Austin metro, while a condenser-only swap runs $4,700 to $8,200.
Is a heat pump a good fit for Austin homes?
Yes, given Austin's mild winters and long cooling season, heat pumps are an increasingly popular choice since one system efficiently handles both heating and cooling.
Do I need a permit for a full HVAC replacement in Austin?
Yes. Any HVAC replacement inside Austin city limits requires a mechanical permit through the Austin Build + Connect portal and a final inspection.
Are there rebates for a new AC or heat pump in Austin?
Austin Energy offers a rebate averaging around $800 for a qualifying energy-efficient installation through a participating contractor, plus additional incentives through the Home Energy Savings program. Confirm current terms directly with Austin Energy.
Why does ductwork matter for my replacement cost?
Many older Austin homes have ductwork sized for equipment from decades ago. A contractor should run a load calculation and check duct sizing before recommending new equipment tonnage.
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