Top 7 HVAC companies in Multnomah, Oregon

Multnomah County holds 812855 residents and spans IECC zones 4C-6B. A Bayesian-adjusted rating pulls each company's star score toward the national mean of 4.764 until review volume allows the raw figure to stand alone. The resulting shortlist draws only from public listing data collected on 2026-08-16. Companies receive extra weight for a public website, HVAC-specialist classification and published 24/7 availability, yet the core order rests on adjusted score. This is a shortlist built from public listing data, not a review of work performed.

How to choose

Review depth matters because a 4.9 from four jobs can shift more than a 4.9 from hundreds once the Bayesian pull is applied. Confirm the contractor holds a CCB Limited Maintenance Specialty Contractor HVAC/R registration and separate BCD limited-energy licensing. Ask whether the firm belongs to the Energy Trust Trade Ally network, which imposes training and inspection requirements. Request the exact permit number the local jurisdiction will assign. Compare the published labor rate against the $140 hourly figure shown in local data.

The shortlist

Efficiency Heating & Cooling

The top firm operates from 14913 SE Kellogg Ave, Milwaukie, OR 97267 and lists (503) 447-6462. It appears as a general contractor with 24/7 availability and a public website. Its raw 4.9 sits above the national mean of 4.764; the adjusted score of 4.956 reflects a modest downward pull because 965 reviews already anchor the rating. These numbers cannot reveal whether the firm finishes jobs on schedule or handles complex duct modifications.

Efficiency Heating & Cooling

Ranked second at 4409 SE 24th Ave Suite 35, Portland, OR 97202 with phone (503) 908-6066, the same general-contractor listing shows 24/7 service and a website. Raw rating 4.9 yields adjusted score 4.952 after the Bayesian step. The 476 reviews keep the score close to raw. The figures give no information on actual callback rates or parts availability during winter peaks.

Oxbow Heating & Cooling

Third place goes to the Gresham address 34725 SE Homan Rd, Gresham, OR 97080 reachable at (503) 867-0026. Listed as a general contractor open 24/7 with a website, its 4.9 raw rating adjusts to 4.947 on 292 reviews. The adjustment moves the score slightly downward from raw. Nothing in the data set indicates how the firm performs on older homes common in east county.

Rose City Heating & Air

The fourth entry at 8946 SW Barbur Blvd, Portland, OR 97219 lists (503) 636-5371. It is a general contractor without 24/7 notation yet maintains a website. Raw 4.9 becomes adjusted 4.934 with 611 reviews. The larger review count limits movement from the national mean. The listing supplies no detail on brand preferences or change-out timelines.

Sunnyside Heating & Cooling

Fifth, at 7710 SE 103rd Ave, Portland, OR 97266 and (503) 777-1696, the general-contractor entry shows 24/7 availability and a website. Its 4.9 raw rating adjusts to 4.922 on only 77 reviews, moving farther toward the mean than firms with hundreds of reviews. The count is too low to confirm consistency across seasons.

Multnomah Heating, Inc.

Sixth place belongs to 2233 NE 244th Ave Ste b-5, Wood Village, OR 97060 reachable at (503) 665-5656. The general contractor lists a website but no 24/7 claim. Raw rating 4.8 sits above the national mean; the adjusted score of 4.838 reflects a small upward Bayesian adjustment because 430 reviews still allow some pull. The data set does not address commercial versus residential workload split.

Pro Heating and Cooling, INC.

Seventh at 10630 SW Barbur Blvd, Portland, OR 97219 with phone (971) 397-7349, the general contractor maintains a website but no 24/7 listing. Raw 4.7 lies below the national mean; the adjusted score rises to 4.745 on 342 reviews. The modest review volume keeps the score from reaching the raw figure. These numbers reveal nothing about technician retention or diagnostic accuracy.

Cost

Installed full-system costs in the county range from $10,100 to $12,300 according to one source, while 2025 invoiced averages reach $22,487 with the upper quartile at $32,761. The two sources therefore diverge by roughly double. Labor is stated at $140 per hour. Permit fees fall between $150 and $500 depending on jurisdiction. Both sources place the county in the high-cost tier versus national benchmarks. Disagreement between the figures likely stems from differences in system size, ductwork scope and whether the invoice set includes heat-pump conversions. Homeowners should obtain itemized bids that separate equipment, labor and permit line items.

Licensing and permits

Oregon maintains statewide licensing through the Construction Contractors Board for business registration and the Building Codes Division for individual technician credentials. The Limited Maintenance Specialty Contractor HVAC/R license covers the relevant scope. CCB requires a surety bond whose minimum varies by license class and general liability insurance at agency-set levels. Permits themselves are issued by the local city or county building department, or by the state where no local department exists. Replacement of an existing furnace or air conditioner is not exempt from permitting under the Oregon Building Code. Homeowners can verify any contractor through the public CCB search tool and the separate BCD license lookup.

Incentives

Oregon Home Energy Rebates, administered by ODOE, are approved for launch late 2025 or early 2026 and offer up to $8,000 for qualifying heat pumps. No state income-tax credit for HVAC remains after the RETC sunset. Energy Trust of Oregon, funded by ratepayers, provides separate rebates of $1,000-$3,000 through its Trade Ally network; membership is required to access those funds. Federal 25C and 25D credits expired at the end of 2025, leaving only the commercial 48E ITC. Because Trade Ally status functions as an additional quality screen, homeowners should begin with that vetted list rather than the broader CCB registry.

Climate

Multnomah County lies primarily in IECC zone 4C marine climate with 4,400 heating degree days and only 400 cooling degree days. Winter design temperature is 27 °F and summer design reaches 89 °F. The load profile is heating-dominant, yet recent heat waves have increased demand for cooling and heat-pump retrofits. Marine conditions favor heat pumps because mild winters reduce strip-heat reliance. East of the Cascades the county edges into drier zones that alter equipment selection. Proper sizing remains critical because oversized units short-cycle in the damp winter air and fail to dehumidify during occasional warm spells. Peak service season stays winter, although summer calls are rising.