5601 6TH AVE S
Office · Seattle · 98108
At a glance
5601 6TH AVE S in Seattle, WA is listed on the Seattle / King County property roll as “Office”, parcel (major-minor) 2738100010. The roll records 391,609 sq ft of building area, 5 floors, a 1982 build year and an assessed value of $48,939,000. 29 active business locations at this address appear in public records.
Derived from suite and floor strings in the occupancy records
Which floors show activity
- 53 on record
- 47 on record
- 36 on record
- 23 on record
- 14 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.
The building's own benchmarking filing
Energy performance
From the building's own filing under its city's benchmarking ordinance, latest of 2 years on record. An ENERGY STAR score of 75 or above means the building outperforms three quarters of comparable buildings nationally. It is a self-reported figure, verified by the city only to the extent the ordinance requires.
Public record — 29 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| SIX WALLS INC | # 379 | Jun 2026 | Seattle business licence | address · medium |
| SOUTHWEST SOLUTIONS GROUP INC | # 463 | Dec 2025 | Seattle business licence | address · medium |
| PLATINUM CLEANING AND FACILTY SERVICES | — | Mar 2025 | Seattle business licence | address · medium |
| WORKPLACE LAW GROUP | # 400 | Jan 2024 | Seattle business licence | address · medium |
| INTERLUNE CORPORATION | # 270 | Oct 2022 | Seattle business licence | address · medium |
| Abm Industry Groups, LLCvia ABM INDUSTRY GROUPS LLC | # 350 | Mar 2022 | Seattle business licence | address · medium |
| OGGVOREP LIMITED LIABILITY COMPANY | # 158 | Apr 2020 | Seattle business licence | address · medium |
| PLAYEVERYWARE | # 378 | Sep 2019 | Seattle business licence | address · medium |
| RR DONNELLEY | — | Jan 2019 | Seattle business licence | address · medium |
| NONPROFIT ASSOCIATION OF WASHINGTON | # 150 | Mar 2018 | Seattle business licence | address · medium |
| ANDERSEN CONSTRUCTION COMPANY OF WASHINGTON LLC | # 550 | Jan 2018 | Seattle business licence | address · medium |
| AMERICAN LUNG ASSOCIATION IN WASHINGTON | # S 460 | Jul 2017 | Seattle business licence | address · medium |
| REPUBLIC PARKING G2 30-516 | — | Apr 2017 | Seattle business licence | address · medium |
| SEATTLE INDIES | # 378 | Nov 2016 | Seattle business licence | address · medium |
| AMERICAN CANCER SOCIETY INC | # 491 | Jan 2015 | Seattle business licence | address · medium |
| ANDERSEN DB SERVICES LLC | # 550 | Jun 2012 | Seattle business licence | address · medium |
| UTTER ASSOCIATES INC | # STE 471 | Jan 2012 | Seattle business licence | address · medium |
| EQUAL OPPORTUNITY SCHOOLS | # 258 | Sep 2010 | Seattle business licence | address · medium |
| MCCULLOUGH ARCHITECTS INC | # 371 | Jul 2010 | Seattle business licence | address · medium |
| ANDERSEN CONSTRUCTION NORTHWEST | # 550 | Jul 2008 | Seattle business licence | address · medium |
| AEROTEC | # 401 | Jul 2005 | Seattle business licence | address · medium |
| OPENSQUARE | # 470 | Mar 2000 | Seattle business licence | address · medium |
| BLUE NILE INC | # 264 | May 1999 | Seattle business licence | address · medium |
| ASSOCIATION SERVICES OF WA INC | # 400 | Jan 1987 | Seattle business licence | address · medium |
| GIRL SCOUTS OF WESTERN WASHINGTON | # STE 150 | Jan 1982 | Seattle business licence | address · medium |
| ACME FOOD SALES INC | # 180 | Oct 1973 | Seattle business licence | address · medium |
| ARCHBRIGHT | — | Jan 1970 | Seattle business licence | address · medium |
| NORTHWEST DAIRY ASSN | — | Nov 1961 | Seattle business licence | address · medium |
| DARIGOLD INC | # 300 | Apr 1949 | Seattle business licence | address · medium |
Seattle / King County assessment roll
Parcel record
| Field | Value |
|---|---|
| parcel (major-minor) | 2738100010 |
| Site address | 5601 6TH AVE S |
| Land use (DOR) | — Office |
| Building area (actual) | 391,609 sq ft |
| Floors / units / buildings | 5 / — / 1 |
| Lot size | — |
| Year built | 1982 |
| Zoning (primary) | — |
| Land value | $11,514,700 |
| Building value | — |
| Total assessed value | $48,939,000 |
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
- 5601 6TH AVE S
- City
- Seattle
- ZIP
- 98108
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 5601 6TH AVE S compare with other Seattle office buildings?
At 391,609 sq ft, 5601 6TH AVE S is about 8 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 $125 per square foot of building area, against $230 across all office floor area on the roll.
Does the owner of 5601 6TH AVE S 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 5601 6TH AVE S recently?
The building files energy-benchmarking disclosures — 2 report years are matched to this parcel.
What does “Office” mean for this parcel?
The Seattle / King County roll classifies parcel (major-minor) 2738100010 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 5601 6TH AVE S?
Seattle / King County's published roll does not include owner names, so no owner is shown.
What companies have offices at 5601 6TH AVE S?
29 active business locations at this building appear in Seattle / King County public records, including SIX WALLS INC, SOUTHWEST SOLUTIONS GROUP INC, PLATINUM CLEANING AND FACILTY SERVICES, WORKPLACE LAW GROUP, INTERLUNE CORPORATION. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 5601 6TH AVE S?
The Seattle / King County roll records 391,609 sq ft of building area, 5 floors, a build year of 1982.
What is the assessed value of 5601 6TH AVE S?
$48,939,000 on the Seattle / King County roll. Assessed values are taxable-roll figures, not market prices.
What is the parcel (major-minor) for 5601 6TH AVE S?
Parcel (major-minor) 2738100010, site address 5601 6TH AVE S, 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 5601 6TH AVE S
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) 2738100010.
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, “5601 6TH AVE S, Seattle, WA (parcel (major-minor) 2738100010)”, https://buildingcensus.com/offices/seattle/office-building-40659527 (data as of September 20, 2026).