AC Installation Cost in Liberty Hill, TX (2026)

Full-system replacement in Liberty Hill plans $8,500–$18,000 per system, with the local variables running to fuel and configuration: heat pumps that reward proper commissioning, propane heat beyond the gas mains, dual-fuel conversions that cut propane bills, and custom homes running two or three systems on staggered replacement clocks.

What moves the number

• Heat pump fluency. Commissioning quality decides heat-pump satisfaction — local reviews document misconfigured installs fixed by proper setup ($150–$500) rather than replacement. Buy installer experience, not just equipment tier.
• Dual-fuel on propane properties. The $1,500–$5,000 conversion premium at replacement pays back through propane displacement — fastest for heavy-heating households; run your actual fuel bills against it.
• Multi-system planning. Two systems aging together should usually replace apart — staggered capital beats doubled mobilization savings for most budgets.
• Rural power protection. Panel and condenser-side surge devices are cheap insurance where sags and outages run livelier than town service.
• The permanent rules. Load calc, duct findings, permit, registration confirmed in writing.

Planning ranges

Liberty Hill / Williamson County planning bands, 2026 — not quotes. Get written, itemized scopes before deciding.

Item	Low	Typical	High
Heat pump commissioning service	$150	$300	$500
Full system replacement (per system)	$8,500	$12,500	$18,000
Dual-fuel conversion premium	$1,500	$3,000	$5,000
Duct sealing / balancing	$500	$1,500	$3,500
Surge protection (panel + condenser)	$400	$650	$1,000

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