Best Licensed Plumbers in Covington, WA
4 plumbers companies registered in Covington hold current L&I licenses, verified against official records as of August 12, 2026. The 4 companies below passed every verification check, ranked by insurance status and bond amount.
How we chose: We identified 5 companies registered in Covington. 4 passed license verification. These 4 passed every check. Our methodology
We earn a fee when you call businesses through numbers on this site. This never affects who is listed or how they rank.
- ✓ L&I License #APEXPPL748D4 — verify at state registryInsured — United Financial Casualty CompBonded — $6,000
- Verified
- August 12, 2026
- Phone
- +12063048062
- ✓ L&I License #MKNKLLP751MN — verify at state registryInsured — United Financial Casualty CompBonded — $6,000
- Verified
- August 12, 2026
- Phone
- +12063179992
- ✓ L&I License #RETROPL792N5 — verify at state registryInsured — Berkshire Hathaway Insurance CBonded — $6,000
- Verified
- August 12, 2026
- Phone
- +12069302011
- ✓ L&I License #WALDIPL776RO — verify at state registryInsured — Liberty Mutual Ins CoBonded — $6,000
- Verified
- August 12, 2026
- Phone
- +12534866204
Compare the top 4 at a glance
| Company | License | Insurance on file | Licensed since |
|---|---|---|---|
| Apex Plumbing LLC | #APEXPPL748D4 | Current | - |
| Mknk Legacy Plumbing LLC | #MKNKLLP751MN | Current | - |
| Retrofit Plumbing LLC | #RETROPL792N5 | Current | - |
| Walding Plumbing LLC | #WALDIPL776RO | Current | - |