HVAC contractor activity in Mercer Island, WA

Ranked by the number of available hvac permit records associated with each business in Mercer Island, WA since March 2026. This is public-record activity, not an editorial or pay-to-play ranking.

Rank	Contractor	Published record count	Record context
#1	GREENWOOD HEATING &HOME SRVS	11 records	Published history
#2	POTELCO INC	9 records	Published history
#3	GENE JOHNSN PLB HTG CL ELC LLC	7 records	Published history
#4	WASHINGTON ENERGY SVCS CO LLC	7 records	Published history
#5	HOME COMFORT ALLIANCE LLC	6 records	Published history
#6	SOUTH WEST PLMBG &WATER HTRS	5 records	Published history
#7	NORTHWEST MECHANICAL	4 records	Published history
#8	OVERLAKE HTG A/C &SHTMTL LLC	4 records	Published history
#9	RESCUE ROOTER	4 records	Published history
#10	ECO ELECTRIC, PLBG, HTG &AIR	4 records	Published history
#11	PRODUCT AIR HTNG &COOLING LLC	4 records	Published history
#12	INFRASOURCE SERVICES LLC	4 records	Published history
#13	BOB'S HEATING &AIR CNDTNG LLC	4 records	Published history
#14	SEATOWN ELECTRIC HTG &AIRLLC	4 records	Published history
#15	INNOVATIVE AIR HEATNG &AC LLC	3 records	Published history
#16	ESSENTIAL HEATING &AIR	3 records	Published history
#17	BALLARD NATURAL GAS SRVC INC	3 records	Published history
#18	BETTER AIR NW HEATING/CLNG LLC	3 records	Published history
#19	SWITCH ELECTRIC LLC	3 records	Published history
#20	ALL CLIMATE HEATING &A/C	3 records	Published history

Review the available hvac permit records

See the newest available source date and the fields the public source publishes for Mercer Island, WA. A permit is evidence of project activity, not a recommendation or a promise that every record includes contact information.

Review Mercer Island, WA permits

How B2B teams use permit activity

Suppliers, software vendors, and market researchers can use permit activity to identify businesses associated with recent work. The source record does not measure workmanship, customer satisfaction, or contractor suitability.

Activity is source-published. A listed business is associated with available public permit records, rather than a paid placement.
Counts are scope-specific. They reflect this city's available permit inventory and the selected date window, not all of a contractor's work.
Fields vary by jurisdiction. Public sources may omit a contractor, owner, address, cost, or contact field on any given record.

Use the Mercer Island, WA record page to review the available records, source date, permit types, and fields for this market.

For hvac contractors: how to land on this list

If you run a hvac business in Mercer Island, WA and don't see your company name here, the available source records may not contain a matching name in this city and date window.

The source may not publish a contractor or applicant name for the relevant records.
A record may use a different business, applicant, or licensee name than the one you searched.

This list is not a statement about current operations, service availability, or contractor quality. PermitGrab lets you review source-published record context where the market provides it. Review Mercer Island, WA source coverage →

Frequently asked

How is this record list calculated?

We count available source-published hvac records in Mercer Island, WA over the displayed date window, group them by the published business name, and sort descending. There is no editorial weighting or paid placement. It is not an exhaustive contractor directory.

Where does the permit data come from?

The linked market page identifies the publishing jurisdiction, newest displayed record date, and available fields. Source dates and field coverage vary by jurisdiction; review the Mercer Island, WA source details before relying on a time-sensitive workflow.

How is this different from a review directory?

This page summarizes available public-record history for a selected city and trade. Review directories summarize user experiences. Neither one establishes current availability, workmanship, or a recommendation; use the source fields and your own diligence for the decision at hand.

Why is contractor X not on this list?

The available records may not contain that exact name, the source may omit names, or a different applicant or licensee name may appear. This is not a conclusion about a business's current work. The full source-bound search interface is on the Mercer Island, WA record page.

I'm a hvac contractor — how do I use this?

Review the published names, record types, dates, and available project fields in your service area. Confirm the source date and field coverage on the market page before acting; current plan terms are shown during signup.