3850 148TH AVE NE
Office · Seattle · 98052
At a glance
3850 148TH AVE NE in Seattle, WA is listed on the Seattle / King County property roll as “Office”, parcel (major-minor) 6448300112. The roll records 565,150 sq ft of building area, 3 floors, a 2000 build year and an assessed value of $109,482,200.
Public record — 0 matched business locations
Tenants & business locations
No active business locations at this address appear in the public records ingested so far. That is a statement about the records, not the building: tenants without a county business-tax receipt or a Florida registration at this address are invisible to public data.
Seattle / King County assessment roll
Parcel record
| Field | Value |
|---|---|
| parcel (major-minor) | 6448300112 |
| Site address | 3850 148TH AVE NE |
| Land use (DOR) | — Office |
| Building area (actual) | 565,150 sq ft |
| Floors / units / buildings | 3 / — / 2 |
| Lot size | — |
| Year built | 2000 |
| Zoning (primary) | — |
| Land value | $25,052,100 |
| Building value | — |
| Total assessed value | $109,482,200 |
Recorded owner (assessment roll)
No owning organisation shown. Where the county roll names a private individual, the name and mailing address are not published here.
Location
- Address
- 3850 148TH AVE NE
- City
- Seattle
- ZIP
- 98052
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 3850 148TH AVE NE compare with other Seattle office buildings?
At 565,150 sq ft, 3850 148TH AVE NE is about 12 times the size of the average office building on the Seattle / King County roll, which comes to 46,649 sq ft across 4,289 buildings.
Its assessed value works out to $194 per square foot of building area, against $230 across all office floor area on the roll.
Does the owner of 3850 148TH AVE NE hold other Seattle office property?
Seattle / King County's published roll does not include owner names, so no owner is shown for any parcel in this metro.
What does “Office” mean for this parcel?
The Seattle / King County roll classifies parcel (major-minor) 6448300112 as “Office”. BuildingCensus includes a parcel in its office census when the roll gives it an office-class use, so the label is the county's, not an inference.
Frequently asked questions
Who owns 3850 148TH AVE NE?
Seattle / King County's published roll does not include owner names, so no owner is shown.
What companies have offices at 3850 148TH AVE NE?
No business locations at this building appear in the public records ingested so far — no licence, tax or registry record currently lists this address; that is a gap in the record, not proof the building is empty.
How big is 3850 148TH AVE NE?
The Seattle / King County roll records 565,150 sq ft of building area, 3 floors, a build year of 2000.
What is the assessed value of 3850 148TH AVE NE?
$109,482,200 on the Seattle / King County roll. Assessed values are taxable-roll figures, not market prices.
What is the parcel (major-minor) for 3850 148TH AVE NE?
Parcel (major-minor) 6448300112, site address 3850 148TH AVE NE, Seattle. It is the key to look the parcel up in the King County Assessor bulk extracts and Seattle open data (Seattle / King County).
More around 3850 148TH AVE NE
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- Seattle / King County — King County Assessor bulk extracts and Seattle open data. Washington law restricts commercial use of lists of individuals, so this metro is built without personal names by design: the county's name-stripped account file provides mailing addresses (portfolios group by mailing cluster, unnamed), sales show price and date but never buyer or seller, and tenants are business licence trade names.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
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Dataset updated . Source: Seattle / King County assessment roll, parcel (major-minor) 6448300112.
About this data
Source: King County Assessor bulk extracts and Seattle open data (Seattle / King County), as published September 20, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “3850 148TH AVE NE, Seattle, WA (parcel (major-minor) 6448300112)”, https://buildingcensus.com/offices/seattle/office-building-b9cbcfd4 (data as of September 20, 2026).