HVAC, Plumbing & Electrical Services in SeaTac, WA
Heating, cooling, plumbing and electrical service for SeaTac homes from our Redmond branch, with after-hours emergency heating and cooling service and rebates from Seattle City Light or PSE.
Locally-owned since 1977 • Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD) • WA Electrical Contractor Lic. #HOMECCA782DC • WA Plumbing Contractor Lic. #HOMECCA751QG • NATE-certified technicians • Carrier Factory Authorized Dealer • Mitsubishi Electric Diamond Dealer • Lennox Premier Dealer
Heating, cooling, plumbing and electrical service in SeaTac
Home Comfort Alliance's Redmond branch team serves SeaTac homes for heating and air conditioning, residential plumbing and electrical work. Our NATE-certified technicians, licensed plumbers and licensed electricians work from one schedule, we pull the permits, and you get a written, upfront price before any work begins.
Licensed, bonded and insured in Washington: WA Contractor Reg. #HOMECCA785BD, WA Electrical Contractor Lic. #HOMECCA782DC and WA Plumbing Contractor Lic. #HOMECCA751QG (residential). Call (425) 645-0404 or use the form at the end of this page.
Our SeaTac services
Furnaces and heating
Gas furnace repair and replacement, electric furnaces and tune-ups.
Heat pumps and ductless
Heat pumps for whole-home heating and cooling, and ductless systems for homes on baseboard heat.
Heat pump installation in SeaTac · Baseboard to heat pump · Ductless
Air quality and upkeep
Tune-ups, duct cleaning, air purifiers, dehumidifiers and ERV or HRV ventilation.
Residential plumbing
Water heaters of every type, indoor drain cleaning, leak detection and fixtures.
Electrical
Panel upgrades, EV chargers, standby generators, repairs and new circuits.
Smell gas or have no heat? For a gas smell, leave the house, then call 911 or PSE at 1-888-225-5773 from outside, and do not switch lights or appliances on or off. For no heat or no cooling, our heating and cooling technicians work after hours for qualifying emergencies, with a $330 after-hours dispatch fee (emergency service). For plumbing and electrical: book by phone or online. Our plumbers and electricians work Monday to Friday, 8 AM to 5 PM, with same-day service when possible.
City Light or PSE? Find your SeaTac utility
In SeaTac, homes north of South 160th Street get electricity from Seattle City Light, and homes south of it get electricity from Puget Sound Energy (PSE), according to the City of SeaTac (SeaTac utilities). PSE supplies natural gas citywide. If your address is close to South 160th, your electric bill settles it. The utility matters because it decides which heat pump and water heater rebates you can use, and Home Comfort Alliance is an approved contractor for both.
Heat pump and water heater rebates in SeaTac (October 2026)
| If your electricity comes from | Heat pump | Heat pump water heater |
|---|---|---|
| Seattle City Light (north of S 160th St) | $300, $400 or $600 instant discount by efficiency tier, taken off the contractor's price | $750 |
| PSE (south of S 160th St) | $1,500 from electric resistance heat; $1,500 for a hybrid heat pump with a PSE gas furnace; up to $2,400 with Efficiency Boost; $4,000 for income-qualified gas to heat pump conversions | $1,000, or $1,100 with Efficiency Boost |
We handle the paperwork on PSE rebates. Seattle's Clean Heat program applies only inside Seattle, and Energy Smart Eastside does not cover SeaTac. Washington's HEAR program may help income-qualified households. The federal 25C credit ended for equipment placed in service after December 31, 2025.
Gas or electric heat in SeaTac homes
SeaTac has two common heating setups, and the upgrade path differs. Homes with a PSE gas furnace can replace it with a new high-efficiency furnace, or keep gas as backup and add a heat pump as a hybrid system, which also brings air conditioning. Homes heated by electric baseboards or wall heaters, often without ducts, usually do best with a ductless heat pump: it heats more efficiently than resistance heat, cools in summer, and needs no ductwork. Every installation starts with an ACCA Manual J load calculation so the system is sized for your home, not guessed.
Permits in SeaTac
The City of SeaTac Permit Center issues building, mechanical, plumbing and electrical permits through the City's online permit portal (SeaTac Permit Center). SeaTac runs its own electrical permits and inspections rather than L&I (L&I city list). We pull the required permits for every installation and schedule the inspections.
Living with closed windows near Sea-Tac Airport
Many homes close to the airport were sealed against jet noise, and the Port of Seattle notes that ventilation systems and panel upgrades can be part of that work (Port of Seattle). A house that stays shut needs its mechanical systems to do the work open windows would. Our checklist for these homes:
- Fresh air: an ERV or HRV brings in outdoor air and keeps the heat or cool you paid for
- Clean air: better filtration or a whole-home air purifier for outdoor pollutants and dust
- Dry air: a dehumidifier where windows and walls show condensation
- Quiet cooling: ductless or heat pump cooling, so summer evenings do not mean opening up
- Power: a panel check before new equipment adds load
Home Comfort Alliance does not run or work for the Port's insulation program; program questions go to the Port of Seattle.
What common services cost in SeaTac
Visit fees are listed separately by trade, and you approve a written price before work starts:
| Service | Price |
|---|---|
| HVAC dispatch fee | $119 |
| HVAC diagnostic (standard / deeper) | $72 / $130 |
| Heating or cooling tune-up | $230 ($180 Home Comfort Club) |
| Plumbing dispatch fee | $99 |
| Drain cleaning | $148 |
| Hydro jetting | $399 to $574 |
| Electrical dispatch fee, 30-minute diagnostic included | $179 |
| Standard outlet replacement | $104 |
Prices as of September 2026.
New systems and replacements get a free estimate, and the instant HVAC quote shows a price range online first. Current offers: $50 off HVAC service or repair, and $300 off water heater installation.
Financing
Payment plans starting at $179/month* through Salal Credit Union and Synchrony, with 0% interest options for qualifying customers. See financing.
*Financing through Salal Credit Union or Synchrony, subject to credit approval. Rates, terms and monthly payments depend on the amount financed, the plan and your credit. 0% interest options are available to qualifying customers. See lender for full terms.
Get an estimateA written, upfront price before any work begins.
A recent SeaTac job: a gas furnace and heat pump together
In September 2026 we installed a new gas furnace in the crawlspace of a SeaTac home and paired it with a new heat pump outside, so the heat pump handles most of the heating and cooling and the furnace backs it up in the coldest weather. The job included a new filter and thermostat, about 35 feet of new electrical run and 25 feet of refrigerant line to the outdoor unit, and reattaching the furnace's B-vent into the chimney. Permits were included, and because the home is on PSE, a $1,500 PSE rebate came off the invoice.
Warranty and Home Comfort Club
We support the manufacturer's warranty on covered equipment parts and new installations come with a 3-year Comfort Shield labor warranty, kept active with yearly maintenance. Home Comfort Club members, from $15 a month, with a new system installed by Home Comfort Alliance get extended labor coverage for as long as the membership stays active, up to 5 years from installation, plus Club pricing on tune-ups.
- Mitsubishi Electric Diamond Dealer, Carrier Factory Authorized Dealer and Lennox Premier Dealer
- Approved contractor for Seattle City Light and PSE
- Best Pick 2025 and 2026; BBB Accredited Business since 2002
Where we work around SeaTac
We cover all of SeaTac, north and south of South 160th Street, and the neighboring cities of Burien, Tukwila, Des Moines, Renton and Kent.
SeaTac home services FAQ
Do you serve SeaTac, and which branch handles it?
Yes. Our Redmond branch team serves SeaTac for heating and cooling, residential plumbing and electrical work. Call our main line at (425) 645-0404 or book online any time.
Is my SeaTac home on Seattle City Light or PSE?
According to the City of SeaTac, homes north of South 160th Street are on Seattle City Light and homes south of it are on PSE. Your bill confirms it. Rebates follow the utility, and we are an approved contractor for both.
What heat pump and water heater rebates can I get in SeaTac?
As of October 2026: City Light customers get a $300, $400 or $600 instant discount on a qualifying heat pump and $750 on a heat pump water heater. PSE customers can get $1,500 for a heat pump replacing electric resistance heat, $1,500 for a hybrid heat pump with a gas furnace, up to $2,400 with Efficiency Boost, $4,000 for income-qualified gas to heat pump conversions, and $1,000 or $1,100 on a heat pump water heater. We handle PSE rebate paperwork.
Full rebate rules, sizing and permits: heat pump installation in SeaTac.
Who provides natural gas in SeaTac, and what should I do if I smell gas?
PSE supplies natural gas in SeaTac. If you smell gas, leave the house, then call 911 or PSE at 1-888-225-5773 from outside. Do not switch lights or appliances on or off on the way out.
Who issues permits for heating, plumbing and electrical work in SeaTac?
The City of SeaTac Permit Center, including electrical permits and inspections, since SeaTac runs its own electrical program instead of L&I. We pull the required permits for every installation.
How much does a service visit cost?
HVAC dispatch is $119, with diagnostics of $72 or $130 listed separately. Plumbing dispatch is $99, and electrical dispatch is $179 with a 30-minute diagnostic included. You see a written price before any work begins.
How much does furnace replacement cost in SeaTac?
It depends on the furnace type, your ductwork and the installation conditions. Our instant HVAC quote gives a price range online, the in-home estimate is free, and our SeaTac furnace replacement page explains the options.
Do you offer emergency service in SeaTac?
Yes for heating and cooling: after-hours service for qualifying emergencies, with a $330 after-hours dispatch fee. For plumbing and electrical: book by phone or online. Our plumbers and electricians work Monday to Friday, 8 AM to 5 PM, with same-day service when possible.
My home near the airport keeps its windows closed. What helps with fresh air and summer heat?
Balanced ventilation with an ERV or HRV, a whole-home air purifier, a dehumidifier if you see condensation, and ductless or heat pump cooling. We size every installation with an ACCA Manual J load calculation and check panel capacity first.
Do you do sewer line or septic work?
No. Our residential plumbers clean indoor drains, with drain cleaning at $148 and hydro jetting at $399 to $574. Sewer lines and septic systems are outside our services.
Sources
- City of SeaTac, utilities
- City of SeaTac, Permit Center
- Washington L&I, cities that issue their own electrical permits
- Seattle City Light, heating and cooling incentives
- PSE, residential rebates flyer (March 2026)
- Port of Seattle, sound insulation for airport neighbors
- Washington L&I, Verify a Contractor
Sources checked October 2026.
Why Choose Home Comfort Alliance in SeaTac?
Your Comfort is Our Promise
We promise...
Reliable heating, air conditioning, plumbing and electrical service, all from one trusted company.
To educate and guide you through your options so you’ll find the right solution at the right price.
Knowledgeable and respectful workers who ensure both your own comfort during the installation process, and lasting comfort from your home systems.
Outstanding service, communication, and follow-up, so your home is comfortable now and for years to come.
Get an estimate in SeaTac
Tell us what you need: heating, cooling, plumbing or electrical. Our Redmond team will call you back and give you a written, upfront price before any work begins.
Request service in SeaTac
Our team will call you to set up a visit. For no heat or no cooling after hours, call (425) 645-0404.