ZIP 98051 falls in King County, Washington, where we hold 84,437 parcels measured as septic county-wide and 486,662 on sewer. We do not have a per-ZIP parcel count for this county, so this is the county total, not a count specific to ZIP 98051.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| King County, Washington | 100% | 184,607 | 84,437 | 486,662 |
13 businesses on record with an address in this ZIP: pumping, installation, design, inspection and repair. Not an endorsement, and we take no fee.
| Company | City | Phone | Rating |
|---|---|---|---|
| Maple Valley Plumbing | Ravensdale | (425) 432-7599 | 4.2 (47) |
| Columbia Land Services | Ravensdale | (425) 584-7167 | — |
| Northwest Septic Services LLC (Lillys) | Ravensdale | (425) 432-3084 | — |
| Lilly's Septic Service | Ravensdale | (425) 432-3084 | — |
| Northwest Septic Services LLC (Lilly's Septic Service) | Ravensdale | (425) 432-3084 | — |
| Northwest Septic Services LLC | Ravensdale | (425) 432-3084 | — |
| Columbia Land Services Inc | Ravensdale | (425) 584-7167 | — |
| Columbia Land Services Inc | Ravensdale | (425) 584-7167 | — |
| Columbia Land Services Inc | Ravensdale | (425) 584-7167 | — |
| Columbia Land Services Inc | Ravensdale | (425) 581-7167 | — |
| Columbia Land Services Inc | Ravensdale | (425) 584-7167 | — |
| Lilly's Septic Service | Ravensdale | (425) 432-3084 | — |
| Northwest Septic Services LLC (Lilly's Septic Service) | Ravensdale | (425) 432-3084 | — |
Land-area overlap is from the 2020 Census Bureau ZCTA5-to-county relationship file, not an estimate of ours. Parcel and document counts are rows we hold, not a survey of every property in the ZIP. Last verified 2026-09-01.
We hold 84,437 parcels measured as septic for King County, Washington as a whole, not broken out by ZIP.
ZIP 98051 falls in King County, Washington.