4 reports. Useful first pass, but one outlier can still shift the range.
HVAC System Replacement Cost in Washington
Read what 4 homeowners actually wroteIn Washington, hvac system replacement costs typically range from $5,000 to $17,000, with most homeowners paying around $13,150. Half of the projects tracked fell between $10,475 and $14,750.
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Shaded band: middle 50% of reports (25th–75th percentile). Median tick in teal.
Most jobs land between $6,095.00 and $16,550.00 (5th–95th percentile). Ignoring 1 outlier below and 1 above.
Based on reports from Apr 2026 (first entries this month).
Data last updated Apr 8, 2026.
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The underlying prices behind this page.
Replaced my gas furnace and added AC for around $5k with an independent contractor named Quality Heating and Air. Got scheduled quickly and the work was completed in one day.
Replaced a 15-year-old single-stage furnace with a variable-speed furnace and a 2-ton AC unit. The total system cost was $17K.
Real homeowner write-ups, locked.
"Replaced furnace with a heat pump/hybrid gas system, tied into existing ductwork. Initially quoted $14k but got a discount for waiting a month."
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Related in HVAC: AC Repair, Heat Pump Installation, Mini Split AC Installation, AC Installation.