155 NE 100TH ST
Office · Seattle · 98125
At a glance
155 NE 100TH ST in Seattle, WA is listed on the Seattle / King County property roll as “Office”, parcel (major-minor) 2434900010. The roll records 113,136 sq ft of building area, 5 floors, a 1974 build year and an assessed value of $34,554,200. It last sold for $72,300,000 in Oct 2021. 20 active business locations at this address appear in public records.
Derived from suite and floor strings in the occupancy records
Which floors show activity
- 51 on record
- 45 on record
- 35 on record
- 25 on record
- 12 on record
Floors are read from suite numbers on Seattle / King County business records (suite 4900 → floor 49). A floor with no record is not necessarily vacant — it may be mechanical, occupied by the owner, or let to a business whose receipt carries no suite. Receipts also lag reality by months. This shows where the public record places businesses, not a rent roll or an availability report. A stretch of quiet floors is not contiguous space for rent — it is contiguous silence in the record, which is the closest thing the public record has to that question and worth exactly what it costs to check.
Recorded transfers — county roll + state sale file
Sale history
| Recorded | Price | Qualification | Source | Instrument |
|---|---|---|---|---|
| Oct 2021 | $72,300,000 | not rated | County roll | — |
Prices are the consideration recorded in Seattle / King County's public property records. Where a qualification code exists it is the assessor's judgement of whether a transfer was arm's length; transfers without one appear unrated rather than assumed clean. Whether a building is on the market today, and at what price, is not a public record and is not shown here — asking prices, listings and lease terms live in private commercial databases.
Public record — 20 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| SAGE HOMES NORTHWEST LLC | # 401 | Jan 2026 | Seattle business licence | address · medium |
| RWDI USA LLC | — | Nov 2025 | Seattle business licence | address · medium |
| DIAMOND PARKING SERVICES WX080 | — | Apr 2025 | Seattle business licence | address · medium |
| TEST INNOVATORS INC | # 302 | Oct 2018 | Seattle business licence | address · medium |
| EDWARD JONES 94764 | # 300 | Aug 2018 | Seattle business licence | address · medium |
| ODAMA LAW PLLC | # 210 | Feb 2018 | Seattle business licence | address · medium |
| THE ARTHRITIS FOUNDATION INC | # 303 | Mar 2016 | Seattle business licence | address · medium |
| HART JARVIS MURRAY CHANG PLLC | # STE 210 | Jul 2014 | Seattle business licence | address · medium |
| ALISA S NA CPA PC | # 403 | Mar 2013 | Seattle business licence | address · medium |
| U&T CAPITAL MANAGEMENT | # 403 | Mar 2013 | Seattle business licence | address · medium |
| VITAL KIDS MEDICINE PLLC | # 402 | May 2012 | Seattle business licence | address · medium |
| FRONTIER BONDING SERVICE LLC | # 201 | Oct 2010 | Seattle business licence | address · medium |
| EYE ASSOCIATES NORTHWEST PC | # 110 | Jan 2008 | Seattle business licence | address · medium |
| OHANA FIDUCIARY CORP | # 209 | Jun 2007 | Seattle business licence | address · medium |
| LAKE UNION ESCROW INC | # 309 | Jul 2003 | Seattle business licence | address · medium |
| CENTERWELL HOME HEALTH | # 510 | Apr 2002 | Seattle business licence | address · medium |
| HEALTHY MOTHERS HEALTHY BABIES | # 410 | Jan 2001 | Seattle business licence | address · medium |
| WASHINGTON POISON CENTER | # 100 | Jul 1995 | Seattle business licence | address · medium |
| LANDAU ASSOCIATES INC | # 302 | Jul 1988 | Seattle business licence | address · medium |
| CORVEL HEALTHCARE CORP | # 220 | Jan 1985 | Seattle business licence | address · medium |
Seattle / King County assessment roll
Parcel record
| Field | Value |
|---|---|
| parcel (major-minor) | 2434900010 |
| Site address | 155 NE 100TH ST |
| Land use (DOR) | — Office |
| Building area (actual) | 113,136 sq ft |
| Floors / units / buildings | 5 / — / 2 |
| Lot size | — |
| Year built | 1974 |
| Zoning (primary) | — |
| Land value | $34,553,200 |
| Building value | — |
| Total assessed value | $34,554,200 |
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
- 155 NE 100TH ST
- City
- Seattle
- ZIP
- 98125
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 155 NE 100TH ST compare with other Seattle office buildings?
At 113,136 sq ft, 155 NE 100TH ST is about twice 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 $305 per square foot of building area, against $230 across all office floor area on the roll.
The last recorded sale priced it at $639 per square foot.
Does the owner of 155 NE 100TH ST 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 has happened at 155 NE 100TH ST recently?
1 recorded transfer is on file for this parcel, the latest dated Oct 2021.
What does “Office” mean for this parcel?
The Seattle / King County roll classifies parcel (major-minor) 2434900010 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 155 NE 100TH ST?
Seattle / King County's published roll does not include owner names, so no owner is shown.
What companies have offices at 155 NE 100TH ST?
20 active business locations at this building appear in Seattle / King County public records, including SAGE HOMES NORTHWEST LLC, RWDI USA LLC, DIAMOND PARKING SERVICES WX080, TEST INNOVATORS INC, EDWARD JONES 94764. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 155 NE 100TH ST?
The Seattle / King County roll records 113,136 sq ft of building area, 5 floors, a build year of 1974.
What is the assessed value of 155 NE 100TH ST?
$34,554,200 on the Seattle / King County roll. Assessed values are taxable-roll figures, not market prices.
When did 155 NE 100TH ST last sell?
The last recorded transfer was in Oct 2021 for $72,300,000 ($639 per square foot).
What is the parcel (major-minor) for 155 NE 100TH ST?
Parcel (major-minor) 2434900010, site address 155 NE 100TH ST, 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 155 NE 100TH ST
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) 2434900010.
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, “155 NE 100TH ST, Seattle, WA (parcel (major-minor) 2434900010)”, https://buildingcensus.com/offices/seattle/office-building-adaedc1f (data as of September 20, 2026).