Plumbing contractor activity in King County, WA

Ranked by the number of available plumbing permit records associated with each business in King County, 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	FAST WATER HEATER COMPANY	114 records	Published history
#2	EPIC PLUMBING LLC	48 records	Published history
#3	Monarch Plumbing	32 records	Published history
#4	NORTHWEST PLUMBING CONTRS INC	31 records	Published history
#5	NOBLE PLUMBING LLC	29 records	Published history
#6	WEST COAST PLUMBING INC	26 records	Published history
#7	HD PARTNERS	24 records	Published history
#8	SCHULTE PLUMBING LLC	24 records	Published history
#9	Washington Energy Services	20 records	Published history
#10	PEREZ PLUMBING INC	17 records	Published history
#11	QUALITY PLUMBING	17 records	Published history
#12	JJ PLUMBING	15 records	Published history
#13	MAESTRO PLUMBING LLC	15 records	Published history
#14	JBAR Plumbing LLC	15 records	Published history
#15	BETTER FLOW PLUMBING LLC	14 records	Published history
#16	SERVICE PLUMBING & HEATING INC	13 records	Published history
#17	NORTHWEST MECHANICAL	13 records	Published history
#18	MacDonald-Miller Facility Solutions LLC	12 records	Published history
#19	Holmberg Company	12 records	Published history
#20	Northwest Plumbing Connection	12 records	Published history

Review the available plumbing permit records

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

Review King County, 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 King County, WA record page to review the available records, source date, permit types, and fields for this market.

For plumbing contractors: how to land on this list

If you run a plumbing business in King County, 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 King County, WA source coverage →

Frequently asked

How is this record list calculated?

We count available source-published plumbing records in King County, 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 King County, 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 King County, WA record page.

I'm a plumbing 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.