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Westin Building

OperatingColocationBuildingSeattle, King County, Washington
50% profile completeness
20 claims from 6 sources
Current facility power
Not yet sourced
Planned capacity
Not yet sourced
Floor area
445,400 sq ft[1]
Unverifiedestimated
Buildings (planned)
Not yet sourced
Capital cost / investment
Not yet sourced
First operational
1981[1]
Likely

POWER & GRID

Time-to-power · verification · interconnection
Time to power
Operating (community-mapped, unverified)
Low confidence
Project verification
Unverified
Evidence is limited to community map.
Current stage
Operational
Furthest stage with documented evidence
Utility · ISO
City of Seattle - (Wa) · None (non-RTO region)
Substation: Waterfront Streetcar Rectifier Sub. No. 20 (nearest, unverified)

Power reality

Announced
No record
Interconnection request
No record
Contracted / approved
No record
Under construction
No record
Operational
No record
AI evidence brief
Summarizes only the evidence on this page. Answers citing anything else are rejected automatically.

Project verification

Development
  1. Announcedimplied by a later stage
  2. Land acquiredimplied by a later stage
  3. Planning / zoningimplied by a later stage
  4. Permittingimplied by a later stage
Grid interconnection
  1. Interconnection application
  2. Feasibility study
  3. System impact study
  4. Facilities study
  5. Interconnection agreement / service contract
Build & energization
  1. Financing
  2. Under constructionimplied by a later stage
  3. Energizationimplied by a later stage
  4. OperationalSep 27, 2026
    Community map
    • Sep 27, 2026 · Reported status: operating[1]

● documented · ◌ implied by a later stage · ○ no evidence found. Dates are those of the earliest dated evidence, which can be later than when a stage actually began. Evidence classes: Community map.

Grid path

  1. facility
    Westin Building (SEA10)
  2. substation
    Waterfront Streetcar Rectifier Sub. No. 20[1]
    Proximity onlyUnverified
    Nearest mapped substation, 0.66 km away. Proximity does not establish that it serves the site.
  3. transmission
    115 kV line[1]
    Proximity onlyUnverified
    Highest-voltage line mapped within 2 km (0.91 km away). Not confirmed as the supply path.
  4. utility
    City of Seattle - (Wa)[2]
    Service territoryLikely
    Retail service territory containing the site
  5. ISO / RTO
    None (non-RTO region)[3]
    Service territoryLikely
    Balancing authority: SCL
Substation capacity:
not published
Required upgrades:
not yet sourced
Congestion:
not yet sourced (no nodal price data)

Dashed boxes are based on proximity only and do not establish which asset serves the site.

Interconnection records

No interconnection-queue record is linked to this site. Of the ISOs we ingest, only NYISO publishes large-load requests; PJM, ERCOT, MISO, SPP and CAISO queues list generation only.

On-site & dedicated generation

No on-site, behind-the-meter or dedicated generation found in sources.

Location & imagery

Mapped outline
Coordinates
47.61439, -122.33893
Address
2001 6th Avenue, Seattle, WA 98121[1]Likely
County
King County
CLLI code
STTLWAWB[1]Likely
Photographs
Two rows of racks at one of the colos in The Westin Building.
Two rows of racks at one of the colos in The Westin Building.
Atomic Taco from Seattle, WA, USA · CC BY-SA 2.0 · 2012-09-08 [6]
Geotagged ~8 m from this location; title/description mentions a data center or this facility's operator. May show a neighboring building.

Ownership, operation & customers

  1. 1. Property owner of record
    Not identified
  2. 2. Owner / developer
    Not identified
  3. 3. Operator
    Digital Realty[1]Likely
  4. 4. Tenant / cloud
    Not identified
  5. 5. End customer / workload
    Not identified
Power supply
Utility:
City of Seattle - (Wa)(unreviewed)[2]Unverified

Each link is sourced separately. The property owner of record is often a special-purpose entity; the same company appearing in two roles is shown only when sources say so.

All parties with evidence
Operator
Utility
City of Seattle - (Wa)(unreviewed)[2]Unverified

Most likely retail provider among 2 overlapping service territories (largest retail sales; territory polygons are approximate). Also overlapping: City of Milton - (Wa).

No tenants or end users identified in our sources yet.

Power (all fields)

Current facility power
Not yet sourced
Planned capacity
Not yet sourced

Capacity figures are nameplate or contracted; annual consumption is a labeled model estimate, not metered data.

Grid & electricity

ISO / RTO
None (non-RTO region)[3]Likelyderived

Outside all ISO/RTO footprints; balancing authority shown separately.

Balancing authority
SCL[2]Likelyderived

Control area of the containing utility territory.

Nearest mapped substation
Waterfront Streetcar Rectifier Sub. No. 20[1]Likelyderived

Nearest substation mapped in OpenStreetMap; proximity does not establish which substation serves the site.

Distance to substation
0.7 km[1]Likelyderived
Highest-voltage line nearby
115 kV[1]Likelyderived

Highest-voltage transmission line mapped within 2 km.

State avg. industrial price
7.51¢/kWh[4]Confirmed

Washington statewide average, July 2026.

State avg. commercial price
11.78¢/kWh[4]Confirmed

Washington statewide average, July 2026.

Generation within 50 km
145 MW[5]Confirmedderived

13 EIA-reported plants within 50 km.

Interconnection status
Not yet sourced
Contracted / committed power
Not yet sourced
Nearby infrastructureTypeDistanceVoltage / capacitySource
115 kV lineTransmission line0.91 km115 kV[1]
University of Washington Power Plant · University of WashingtonPower plant (Petroleum)5.1 km15 MW[5]
Snoqualmie 2 · Puget Sound Energy IncPower plant (Hydroelectric)38.1 km34 MW[5]
Snoqualmie · Puget Sound Energy IncPower plant (Hydroelectric)38.5 km12 MW[5]
South Fork Tolt · City of Seattle - (WA)Power plant (Hydroelectric)42.7 km17 MW[5]
Youngs Creek Hydroelectric Project · PUD No 1 of Snohomish CountyPower plant (Hydroelectric)44.9 km8 MW[5]
Cedar Falls (Wa) · City of Seattle - (WA)Power plant (Hydroelectric)47.1 km30 MW[5]
Calligan Creek Hydroelectric Project · PUD No 1 of Snohomish CountyPower plant (Hydroelectric)48.8 km7 MW[5]
Hancock Creek Hydroelectric Project · PUD No 1 of Snohomish CountyPower plant (Hydroelectric)48.9 km7 MW[5]
Waterfront Streetcar Rectifier Sub. No. 20 · King County MetroSubstation0.66 km—[1]
Denny Substation · Seattle City LightSubstation0.74 km—[1]
Denny SubstationSubstation0.74 km—[1]
Union Street SubstationSubstation0.81 km—[1]
Broad Street Substation · Seattle City LightSubstation0.94 km115 kV[1]
Broad Street Substation Annex · Seattle City LightSubstation0.96 km—[1]

Utility, ISO and nearby assets are derived from the site's location. Proximity to a substation or line doesn't establish the interconnection; that needs a utility filing or interconnection-queue record. Queue requests are applications, not commitments — most never reach operation.

Construction & permitting

  1. Announced
    —
  2. Land acquired
    —
  3. Permitting
    —
  4. Construction start
    —
  5. First operational
    1981[1]
  6. Expected completion
    —

Real estate

Official assessments
Assessor's value for a tax year

None sourced yet

Recorded transactions
Sale prices from recorded deeds

None sourced yet

Model estimates
Our model — not an appraisal

None sourced yet

Annual property tax
Not yet sourced

No county parcel or assessor records linked yet. County records are currently ingested for Loudoun County, VA and Maricopa County, AZ.

Size

Floor area
445,400 sq ft[1]Unverifiedestimated

Estimated as footprint × 34 mapped floors; gross, not leasable, area.

Building footprint
13,100 sq ft[1]Likelyderived

Computed from the mapped OSM building outline.

Floors
34[1]Likely

What changed (last 3 years)

Follow this facility (RSS)

No tracked changes yet. Values are recorded on every data refresh, so changes will appear here over time.

Timeline

First operational: 1981[1]

    All claims (provenance audit)

    20
    FieldValueSourceConfidenceAs ofStatus
    NameWestin Buildingway/223928497 name=Westin Building[1] Likely2026-09-27Shown
    StatusOperating[1] derivedUnverified2026-09-27Shown
    Facility typeColocation[1] derivedUnverified2026-09-27Shown
    Websitehttps://www.westinbldg.com/[1] Likely2026-09-27Shown
    Address2001 6th Avenue, Seattle, WA 98121[1] Likely2026-09-27Shown
    CLLI codeSTTLWAWB[1] Likely2026-09-27Shown
    OperatorDigital Realtyoperator=Digital Realty[1] Likely2026-09-27Shown
    UtilityCity of Seattle - (Wa)territory 16868: CITY OF SEATTLE - (WA) (MUNICIPAL, SEATTLE PUBLIC UTILITIES)[2] derivedUnverified2022Shown
    ISO / RTONone (non-RTO region)[3] derivedLikely—Shown
    Balancing authoritySCL[2] derivedLikely—Shown
    Nearest mapped substationWaterfront Streetcar Rectifier Sub. No. 20way/231362091[1] derivedLikely2026-09-28Shown
    Distance to substation0.7 km[1] derivedLikely2026-09-28Shown
    Highest-voltage line nearby115 kV[1] derivedLikely2026-09-28Shown
    State avg. industrial price7.51¢/kWh[4] Confirmed2026-07Shown
    State avg. commercial price11.78¢/kWh[4] Confirmed2026-07Shown
    Generation within 50 km145 MW[5] derivedConfirmed202502Shown
    Floor area445,400 sq ft[1] estimatedUnverified2026-09-27Shown
    Building footprint13,100 sq ft[1] derivedLikely2026-09-27Shown
    Floors34building:levels=34[1] Likely2026-09-27Shown
    First operational1981start_date=1981[1] Likely2026-09-27Shown