HVAC Replacement Cost in Lake Oswego, OR (2026)
Updated October 2026 · Lake Oswego, OR · index 1.14
How much does a new HVAC system cost in Lake Oswego? For a 3-ton system with central AC + gas furnace, homeowners in Lake Oswego, OR pay about $11,900 on average, and most quotes land between $8,150 and $15,700 — $2,716 to $5,238 per ton. The price covers removing the old system, the new outdoor and indoor equipment, a new line set, electrical and condensate connections, the thermostat, the permit, start-up and commissioning.
The HVAC replacement price in Lake Oswego runs 14% above the U.S. average: construction labor in the Lake Oswego area runs 22% above the national mean, materials 2% above. The same job averages $10,500 nationally and about $11,500 at the Oregon statewide index.
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HVAC replacement price in Lake Oswego by system type
What a 3-ton system costs in Lake Oswego with each system type, installed:
| Option | Average · range |
|---|---|
| Central AC + gas furnacesplit AC, matched coil and an 80,000 BTU furnace$3,977 per ton | $11,900$8,150 – $15,700 |
| Heat pump + air handlerall-electric split heat pump, no furnace$3,688 per ton | $11,100$7,450 – $14,700 |
| Cold-climate heat pump + air handlervariable-speed heat pump rated for deep winter$4,215 per ton | $12,600$8,550 – $16,800 |
The least expensive option in Lake Oswego is heat pump + air handler, at about $11,100; cold-climate heat pump + air handler averages $12,600, 1.1 times as much.
Cost to replace an HVAC system in Lake Oswego by size
With central AC + gas furnace, priced for Lake Oswego, OR:
| Size | Average · range |
|---|---|
| A 2-ton system$5,175 per ton | $10,300$7,050 – $13,600 |
| A 3-ton system$3,977 per ton | $11,900$8,150 – $15,700 |
| A 4-ton system$3,378 per ton | $13,500$9,200 – $17,800 |
Some costs stay the same whatever the size — load calculation and equipment sizing, mechanical permit and inspection, old system removed, refrigerant recovered — so a bigger job costs less per unit: $3,378 per ton for a 4-ton system against $5,175 for a 2-ton system.
What an HVAC replacement in Lake Oswego includes
Line by line, the $11,900 average for a 3-ton system breaks down like this: 32% labor, 65% materials and equipment, and $270 in permit fees passed through at cost.
| Line | Low – high |
|---|---|
| Load calculation and equipment sizing | $90 – $260 |
| Mechanical permit and inspection | $150 – $400 |
| Old system removed, refrigerant recovered | $390 – $690 |
| Gas furnace (about 80,000 BTU) | $1,750 – $3,100 |
| Outdoor unit, set on a new pad | $2,600 – $4,850 |
| Matched indoor coil | $1,150 – $2,450 |
| New refrigerant line set (25 ft) | $430 – $690 |
| Disconnect, whip and thermostat wire | $240 – $390 |
| Condensate drain and safety switch | $130 – $300 |
| Gas connection and furnace venting | $360 – $680 |
| Plenums and transitions to the ducts | $300 – $690 |
| Programmable or smart thermostat | $260 – $480 |
| Evacuation and refrigerant charge | $130 – $260 |
| Start-up and commissioning | $130 – $300 |
| Warranty registration and walk-through | $70 – $150 |
Each line is the price book's U.S. rate for that step, scaled by 0.76 to the installed price published sources give for the whole job (see how these prices are built), times Lake Oswego's index of 1.14; permit fees are not scaled.
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What affects HVAC replacement prices in Lake Oswego
Labor and materials in Lake Oswego
Construction wages in the Lake Oswego metro run 26% above the U.S. mean (BLS, May 2025), and specialty-contractor pay in the city's county moves that down by 3%, to 22% above the national mean. Materials in the area's ZIP codes price 2% above the national average. Together they give Lake Oswego a construction cost index of 1.14.
Where Lake Oswego sits in Oregon
Lake Oswego is the 3rd most expensive of the 7 Oregon cities in our index, against a statewide index of 1.10. Portland is the dearest at 1.21; Eugene is the least expensive at 1.03.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Lake Oswego ranks 62nd from the most expensive. The job that averages $11,900 here averages $10,500 at the national rate.
Climate a system is sized for in Oregon
Contractors size equipment for the local design temperatures. Across Oregon's counties the median is about 91°F on a hot summer day and 19°F on a cold winter night (ENERGY STAR county table), and your county can differ. A standard heat pump handles most winters here; a furnace or a cold-climate model covers the coldest nights.
Sales tax in Oregon
Oregon has no state sales tax. Prices on this page are before any tax.
What a Lake Oswego contractor will ask before quoting
- Job type — new construction, replacement or upgrade — and the evidence for it
- Heating and cooling load for this house (not the old nameplate), tonnage, fuel and refrigerant
- Ducts, line set, circuit, gas line and flue: keep, fix or replace, each with its reason
- Water heater in scope, and whether it shared the old flue
- Panel main amps, free slots and the new equipment's MCA
- Permits, tests and incentives that apply in this state
HVAC replacement cost in other Oregon cities
A 3-ton system with central AC + gas furnace averages $11,900 in Lake Oswego; $12,200 in Beaverton, $11,000 in Salem, $12,600 in Portland.
| City | Average · range |
|---|---|
| Beaverton, OR3% more | $12,200$8,350 – $16,100 |
| Salem, OR8% less | $11,000$7,500 – $14,500 |
| Portland, OR6% more | $12,600$8,650 – $16,700 |
| Eugene, OR10% less | $10,800$7,400 – $14,200 |
| Bend, OR10% less | $10,800$7,400 – $14,200 |
| Medford, OR10% less | $10,800$7,400 – $14,200 |
HVAC replacement price in Lake Oswego: questions
How much does a new HVAC system cost in Lake Oswego, OR?
About $11,900 for a 3-ton system with central AC + gas furnace, and most Lake Oswego quotes fall between $8,150 and $15,700. That is 14% above the U.S. average, where the same job averages $10,500.
What is the HVAC price per ton in Lake Oswego?
$2,716 to $5,238 per ton, about $3,977 on average with central AC + gas furnace. Smaller jobs cost more per unit, because the fixed costs are spread over less.
How much is a 4-ton system in Lake Oswego?
$9,200 to $17,800, about $13,500 on average, with central AC + gas furnace — $3,378 per ton.
Do you need a permit for HVAC replacement in Lake Oswego?
Yes — installing HVAC or fuel-burning equipment needs a permit nearly everywhere, Lake Oswego included. The prices on this page carry $150–$400 for the permit and inspection.
Does the price include sales tax in Oregon?
No tax is included, and Oregon has no state sales tax.
What size HVAC system does a house in Lake Oswego need?
It is worked out with a Manual J load calculation for the house — included in the prices above — not from square footage alone. Here it is run against design temperatures of about 91°F in summer and 19°F in winter (the Oregon median).
Other home projects in Lake Oswego
HVAC replacement cost in Oregon
How these prices are built
Every price on this page comes from JobFlex's contractor price book: what a homeowner pays a licensed contractor for each step of the job, as a U.S. national average per unit, with the contractor's overhead and profit included and sales tax left out. The HVAC replacement is priced step by step, then multiplied by Lake Oswego's construction cost index of 1.14.
Where the price book's steps for an option add up to more than 20% over the installed price a published source gives for the whole job, every step but a permit fee is scaled down to the middle of that range: central AC + gas furnace × 0.76 (HomeCostCalcs 2026: $7,000–$14,000); heat pump + air handler × 0.76, following central AC + gas furnace; cold-climate heat pump + air handler × 0.76, following central AC + gas furnace.
The index weighs local construction wages (BLS Occupational Employment and Wage Statistics, May 2025) at 60% and the area's material prices (Craftsman ZIP-area factors) at 40%. Published indices for Lake Oswego, each on its own base: Craftsman 1.13. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Lake Oswego build quotes like these with JobFlex's HVAC estimator.
- HomeCostCalcs 2026: furnace + AC replacement $7,000-$14,000 standard, $10,000-$20,000 high efficiency
- Today's Homeowner 2025: complete HVAC system install $5,000-$12,500