1260 MERCER ST
Office · Seattle
At a glance
1260 MERCER ST in Seattle, WA is listed on the Seattle / King County property roll as “Office”, parcel (major-minor) 3481800010. The roll records 177,851 sq ft of building area, 4 floors, a 2000 build year and an assessed value of $35,090,000. 3 active business locations at this address appear in public records.
The building's own benchmarking filing
Energy performance
From the building's own filing under its city's benchmarking ordinance. 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 — 3 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| Compass One, LLCvia COMPASS ONE LLC | — | Jan 2019 | Seattle business licence | address · medium |
| Amazon.Com Services, LLCvia AMAZON.COM SERVICES LLC | — | Jan 2018 | Seattle business licence | address · medium |
| AMAZON 1260 MERCER LOT 82074 | — | May 2012 | Seattle business licence | address · medium |
Seattle / King County assessment roll
Parcel record
| Field | Value |
|---|---|
| parcel (major-minor) | 3481800010 |
| Site address | 1260 MERCER ST |
| Land use (DOR) | — Office |
| Building area (actual) | 177,851 sq ft |
| Floors / units / buildings | 4 / — / 2 |
| Lot size | — |
| Year built | 2000 |
| Zoning (primary) | — |
| Land value | $22,644,700 |
| Building value | — |
| Total assessed value | $35,090,000 |
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
- 1260 MERCER ST
- City
- Seattle
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 1260 MERCER ST compare with other Seattle office buildings?
At 177,851 sq ft, 1260 MERCER ST is about 4 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 $197 per square foot of building area, against $230 across all office floor area on the roll.
Does the owner of 1260 MERCER 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 1260 MERCER ST recently?
The building files energy-benchmarking disclosures — 1 report year are matched to this parcel.
What does “Office” mean for this parcel?
The Seattle / King County roll classifies parcel (major-minor) 3481800010 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 1260 MERCER ST?
Seattle / King County's published roll does not include owner names, so no owner is shown.
What companies have offices at 1260 MERCER ST?
3 active business locations at this building appear in Seattle / King County public records, including Compass One, LLC, Amazon.Com Services, LLC, AMAZON 1260 MERCER LOT 82074. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 1260 MERCER ST?
The Seattle / King County roll records 177,851 sq ft of building area, 4 floors, a build year of 2000.
What is the assessed value of 1260 MERCER ST?
$35,090,000 on the Seattle / King County roll. Assessed values are taxable-roll figures, not market prices.
What is the parcel (major-minor) for 1260 MERCER ST?
Parcel (major-minor) 3481800010, site address 1260 MERCER 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 1260 MERCER 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) 3481800010.
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, “1260 MERCER ST, Seattle, WA (parcel (major-minor) 3481800010)”, https://buildingcensus.com/offices/seattle/office-building-64aa591f (data as of September 20, 2026).