Our Issaquah office is at 1275 12th Ave NW, Suite 8. We’ve been working out of it long enough to know the territory: the homes on Cougar Mountain, the Issaquah Highlands, the older ranch styles on the flat blocks closer to Front Street, and the newer Eastside developments with finished basements and three-car garages. Most were built after 1990. Most have existing ductwork. Most are on PSE gas.
Which means when an Issaquah homeowner asks how much an AC installation costs, we can give them an honest, specific answer. And when we give it, there’s almost always a second conversation, one about what Energy Smart Eastside means for the real cost of this decision, that most homeowners didn’t know they needed to have.
We’ll cover the AC pricing first. The second conversation is in the rebates section. It’s worth reading before you decide between AC and a heat pump.
Quick answer: $8,006 to $19,002 for a professionally installed central AC system in Issaquah, depending on system size, equipment tier, and whether electrical work is required.
For the full cost methodology, complete 12-scenario pricing matrix, and detailed case studies from our Seattle-area work, see our guide on AC installation costs in Seattle. This article covers what’s specific to Issaquah.
| Scenario | Price |
| Customer-sourced equipment (Home Depot), Product Air installation | $3,500–$5,000 |
| Entry-level full installation: Runtru by Trane, 14 SEER2 | $8,006 |
| Mid-range, most common: Trane Priority, 17 SEER2 | $13,870 |
| Premium full system: Mitsubishi, Carrier Infinity, Lennox Signature | $16,532–$22,663 |
| Complex installation: panel upgrade, new ductwork, full system | $19,002–$26,000+ |
3-ton system, Issaquah, 2026. Permits included. Before tax.
How AC Pricing Breaks Down in Issaquah
The three main cost components are the same here as in Seattle: equipment, labor, and permits. The local details differ.
Equipment is roughly 45% of the budget. We source through Gensco, our Pacific Northwest regional distributor. No gray market inventory, no clearance stock. For the full breakdown of what each equipment tier includes and how those prices were built, the Seattle AC guide has the complete picture.
Labor is roughly 30% of the budget. We’re seven minutes from downtown Issaquah. No travel premium for homes in Issaquah, Sammamish, or the surrounding Eastside. One number worth knowing: licensed HVAC labor on the Eastside runs 15–20% above the national average, which reflects the same market that applies to every trade working in Bellevue, Kirkland, and Issaquah. That’s not unique to us. It’s the market.
Permits. A residential AC installation in Issaquah requires a mechanical permit from the City, submitted through MyBuildingPermit.com. If the job includes a new circuit or panel work, electrical permits are issued separately by Washington State Department of Labor & Industries, not the city. Both are required. Both are included in our proposal. Mechanical permit fees for standard residential AC installations in Issaquah typically run $100–$250.
What a Permit Is and Why It Matters in Issaquah
A mechanical permit for AC installation is required by law. A contractor who offers to skip it is saving you $150 today at significant cost later.
Without a permit: most manufacturers void the factory warranty. Your insurer can deny HVAC-related claims. And on a home worth what Issaquah homes are worth (median values above $1 million in 2026), unpermitted mechanical work creates disclosure obligations at the time of sale that cost far more than any permit savings ever would. We pull the permits. We coordinate the inspection. That’s included in the price.
Four Equipment Tiers in Issaquah
Home Depot equipment. Midea, Carrier, Lennox through the Pro Installation program. We install them. Equipment cost is separate; our installation starts at $3,500–$5,000.
Entry-level. Runtru by Trane: single-stage, 14 SEER2, 10-year parts warranty. The lowest price point for a fully licensed, permitted, warrantied installation. Starting at $8,006 for a 3-ton add-on.
Mid-range. Trane Priority, Carrier Comfort, American Standard. Two-stage or variable-speed operation, 15–19 SEER2. Best price-to-performance balance for most Issaquah homes. Starting at $13,870 for a 3-ton add-on.
Premium. Mitsubishi multi-zone ductless, Carrier Infinity, Lennox Signature, Trane XV. Top efficiency, lowest operating noise, longest warranty coverage. Starting at $16,532 for ductless, up to $22,663 for a full central system.
Three Installation Types and What Each Covers
Simple. Direct swap of an existing outdoor unit and coil, same location, no electrical modifications. Most post-1990 Issaquah homes with existing gas forced-air systems land here. One day, one crew.
Standard. Includes electrical modifications, duct adjustments, or a relocated outdoor unit. Common in homes where the existing infrastructure doesn’t match the new system’s requirements cleanly.
Complex. Full retrofit, panel upgrade, new ductwork, or major system relocation. Also the category for homes being converted from radiant or baseboard heat to central air: a less common but real scenario on the Eastside.
| Equipment | Simple Add-on | Standard | Complex |
| Home Depot (Midea / Carrier / Lennox) | $3,500–$5,000 | N/A | N/A |
| Entry: Runtru, 14 SEER2 | $8,006 | $10,019 | $13,959 |
| Mid-range: Trane Priority, 17 SEER2 | $13,870 | $14,656 | $19,002 |
| Premium: Mitsubishi / Carrier Infinity | $16,532+ | $17,672+ | $22,663+ |
3-ton, Issaquah, 2026. All prices include permits. Before tax.
After the assessment, we prepare three to four proposal options so homeowners can choose the one that fits their home and their budget. Every proposal is a fixed price with itemized scope, not a range.
Rebates and Incentives for AC in Issaquah in 2026
This section is the most Issaquah-specific part of this guide, and it changes the math in a way that Seattle’s rebate landscape does not.
For central AC only: no rebates exist. PSE, Energy Smart Eastside, and every other regional program available to Issaquah homeowners in 2026 is built around heat pumps. There is no utility rebate for AC-only installations in Issaquah.
For heat pumps, this is where Issaquah is different from the rest of Western Washington.
Energy Smart Eastside is a regional clean energy program covering Issaquah, Bellevue, Kirkland, Redmond, Sammamish, and Mercer Island. It offers:
- $6,000 Fuel Switch Rebate for homeowners switching from gas, oil, propane, or wood heat to a qualifying heat pump. Requires household income below 150% of King County area median income. Approved brands: Mitsubishi, Bryant, Carrier. The system must be fully electric, no gas furnace backup. Cannot be combined with the $1,000 manufacturer rebate.
- $1,000 Manufacturer Rebate for Mitsubishi, Bryant, or Carrier heat pump installations. Cannot be combined with the $6,000 fuel switch.
- Boost Program is for households at or below 80% AMI. The program fully covers heat pump equipment and installation costs. Enrollment opens one to two times per year; funding is limited.
When stacked with PSE’s heat pump rebates, $1,500 to $4,000 depending on income level and the type of conversion, an Issaquah homeowner on PSE gas switching to a qualifying Mitsubishi or Carrier heat pump can access $7,000 to $10,000 or more in total rebates. On a mid-range heat pump that costs $13,870 installed, the net out-of-pocket after rebates can be under $6,000.
That changes the heat pump vs. AC calculation significantly. We’ll run both scenarios at the assessment.
Federal programs. The Section 25C energy efficiency tax credit expired January 1, 2026. The federal HARP and HOMES programs have been allocated funding but have not launched as of June 2026. Do not count on federal rebates when budgeting a 2026 installation.
How we handle the paperwork. Product Air is on the Energy Smart Eastside approved installer list. We apply every available rebate at the proposal stage and submit the documentation on your behalf. You see a deduction on the proposal, not a form you chase down later.
For a complete breakdown of heat pump rebates and program details, see our guide on heat pump installation cost in Seattle.
A Real Installation Example
Erik purchased a home on the north end of Seattle the same month he called us: a 1963 two-story with no cooling, aging electrical, and plans to charge an EV in the garage. He wanted it all done at once. We installed a Mitsubishi MXZ Smart Multi Hyper-Heat 36K multi-zone heat pump, a Trane gas furnace for backup, an Eaton panel upgrade, and the EV charger. Two rebates applied at the time of proposal: $2,350 total. Final price after rebates: $37,173.24.
Three days of installation.
Erik’s job isn’t typical, but his situation (new homeowner, existing electrical limitations, multiple upgrade priorities at once) is one we see regularly on the Eastside. Issaquah homes from the same era often present the same combination of needs.
What to Know Before Installing AC in Issaquah
Electrical panel. Most Issaquah homes built after 1990 carry 200-amp service, which leaves more room for an AC circuit than older Seattle construction. Still worth a formal assessment, especially if EV charging is also on the list. We evaluate the panel on every job before we quote.
Ductwork. Post-1990 Issaquah homes with gas forced-air heat typically have ductwork in usable condition. We inspect accessible sections during the assessment. If sealing or balancing is needed, it’s in the proposal before you commit.
DIY vs. professional installation. Unpermitted work on a $1 million+ home has disclosure consequences at sale that dwarf whatever the installation cost savings were. More practically: Energy Smart Eastside rebates require an approved, licensed installer. A contractor who offers to skip permits also disqualifies you from the rebates that represent the most meaningful cost reduction available in Issaquah.
Service life and maintenance. A professionally installed central AC system in Issaquah’s climate: 15–20 years. Annual maintenance: $149 for a spring AC check, $299 for two visits covering both heating and cooling seasons. Biannual service is required to maintain manufacturer warranty validity.
Why We Publish Real Prices
Most HVAC contractors on the Eastside don’t share their pricing. We do for the same reason we’d answer a direct question from a family member with a direct answer.
The 12-scenario pricing matrix with every combination of equipment tier and installation type lives in our Seattle AC installation cost guide. The numbers there are the same ones we use in Issaquah. The prices in this article are drawn from those same real jobs.
Get a Quote in Issaquah
We assess every home before proposing a system. The assessment is free. After the walkthrough, you receive a written proposal (fixed price, itemized scope, equipment model, permit inclusion, warranty terms) typically the same day or the following morning.
Product Air Issaquah: 1275 12th Ave NW, Suite 8, Issaquah, WA 98027 | (425) 340-3710
Frequently Asked Questions
How much does AC installation cost in Issaquah?
$8,006 to $19,002 for a professionally installed central AC system, depending on size, equipment tier, and whether electrical work is required. Home Depot equipment with professional installation starts at $3,500–$5,000.
Are there rebates for AC in Issaquah?
No. Every utility and municipal rebate program available in Issaquah in 2026, including Energy Smart Eastside, applies to heat pumps only. AC-only installations do not qualify for any current rebate program.
What rebates are available if I install a heat pump instead?
Energy Smart Eastside offers up to $6,000 for fuel-switching from gas to a qualifying heat pump, stackable with PSE rebates that add $1,500–$4,000 more. Total rebates for qualifying Issaquah households can exceed $7,000–$10,000. Brands must be Mitsubishi, Bryant, or Carrier, and installation must be by an approved contractor. Product Air is approved.
Has the IRA 25C tax credit expired?
Yes. The Section 25C energy efficiency tax credit expired January 1, 2026 and is no longer available.
Is a permit required for AC installation in Issaquah?
Yes. A mechanical permit from the City of Issaquah is required. If the job includes electrical work, a separate permit from Washington State L&I is also required. We pull both and coordinate the inspection.
How long does permit processing take in Issaquah?
Issaquah’s online submission process through MyBuildingPermit.com typically processes standard residential mechanical permits in 24–72 hours. We account for this in the installation schedule.
Can I finance a new AC in Issaquah?
Yes. We offer GreenSky financing at 0% APR for 12 months or 10.99% APR for up to 180 months on any installation of $1,000 or more.
How long does installation take?
One day for a standard add-on. Two days for jobs involving electrical work, air handler replacement, or duct modifications. Crew arrives at 7 a.m.
Disclaimer
Prices reflect 2026 Issaquah, WA installations based on Product Air’s current pricing. Rebate programs, permit fees, and equipment costs are subject to change. Request a written proposal for your specific home before budgeting.
— Serge Nikolin, Co-Founder, Product Air Heating, Cooling and Electric
Marysville · Issaquah · Seattle · Western Washington