411 1ST AVE S
Office · Seattle · 98104
At a glance
411 1ST AVE S in Seattle, WA is listed on the Seattle / King County property roll as “Office”, parcel (major-minor) 5247800200. The roll records 154,159 sq ft of building area, 7 floors, a 1913 build year and an assessed value of $30,460,000. 30 active business locations at this address appear in public records.
Derived from suite and floor strings in the occupancy records
Which floors show activity
- 71 on record
- 67 on record
- 54 on record
- 46 on record
- 33 on record
- 25 on record
- 13 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. 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 — 30 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| HNTB CORP | # 200 | Jul 2025 | Seattle business licence | address · medium |
| EVERCUE LLC | # 700 | Jul 2025 | Seattle business licence | address · medium |
| THE DANDY OF KING STREET CROSSING | # 104 | Feb 2025 | Seattle business licence | address · medium |
| DELTA E | # 200N | Dec 2023 | Seattle business licence | address · medium |
| OPTIMUM ENERGY CO WA LLC | # 500 | Jun 2023 | Seattle business licence | address · medium |
| SF IMPACT SERVICES LLC | # 405 | Jan 2022 | Seattle business licence | address · medium |
| BENCH DOG ARCHITECTS | # 205 | Aug 2021 | Seattle business licence | address · medium |
| INTRACORP NW HOMEOWNER CARE LLC | # 650 | May 2018 | Seattle business licence | address · medium |
| BROWNE FAMILY VINEYARDS | # 103 | Jan 2018 | Seattle business licence | address · medium |
| INTRACORP NW LLC | # 650 | Jan 2018 | Seattle business licence | address · medium |
| VITAL SOURCE TECHNOLOGIES LLC | # 404 | Dec 2017 | Seattle business licence | address · medium |
| OPTIMUM ENERGY INTERNATIONAL INC | # 500 | Sep 2017 | Seattle business licence | address · medium |
| SCHARRER AD | # 460 | Jan 2016 | Seattle business licence | address · medium |
| GRAHAM CONSTRUCTION & MANAGEMENT INC | # 320 | Oct 2015 | Seattle business licence | address · medium |
| INTERMEZZO | # 100 | Jun 2014 | Seattle business licence | address · medium |
| WEST COAST CAPITAL LLC | # STE 650 | Apr 2014 | Seattle business licence | address · medium |
| THE ASSURESTART INSURANCE AGENCY LLC | # STE 200N | Nov 2013 | Seattle business licence | address · medium |
| PORCH GROUP INC | # 501 | Sep 2013 | Seattle business licence | address · medium |
| Accenture LLPvia ACCENTURE LLP | # 450 | Jul 2013 | Seattle business licence | address · medium |
| ENCORE ARCHITECTS | # 310 | Oct 2012 | Seattle business licence | address · medium |
| INTRACORP CAPITAL LLC | # STE 650 | Jan 2010 | Seattle business licence | address · medium |
| INTRACORP MARKETING & SALES LLC | # STE 650 | Aug 2009 | Seattle business licence | address · medium |
| TETHER INC | # 404 | May 2008 | Seattle business licence | address · medium |
| INSTITUTE FOR CORPORATE PRODUCTIVITY INC | # 403 | May 2007 | Seattle business licence | address · medium |
| HAINLINE AND ASSOCIATES INC | # STE 210 | Jan 1999 | Seattle business licence | address · medium |
| Maveron LLCvia MAVERON LLC | # 600 | Jan 1998 | Seattle business licence | address · medium |
| NW RE CAPITAL LLC | # STE 650 | Jun 1995 | Seattle business licence | address · medium |
| GRAHAM GROUP US INC | # 320 | Sep 1992 | Seattle business licence | address · medium |
| IL TERRAZZO CARMINE | — | May 1987 | Seattle business licence | address · medium |
| PARSONS TRANSPORTATION GROUP INC | # 500 | Sep 1966 | Seattle business licence | address · medium |
Seattle / King County assessment roll
Parcel record
| Field | Value |
|---|---|
| parcel (major-minor) | 5247800200 |
| Site address | 411 1ST AVE S |
| Land use (DOR) | — Office |
| Building area (actual) | 154,159 sq ft |
| Floors / units / buildings | 7 / — / 1 |
| Lot size | — |
| Year built | 1913 |
| Zoning (primary) | — |
| Land value | $10,970,100 |
| Building value | — |
| Total assessed value | $30,460,000 |
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
- 411 1ST AVE S
- City
- Seattle
- ZIP
- 98104
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 411 1ST AVE S compare with other Seattle office buildings?
At 154,159 sq ft, 411 1ST AVE S is about 3 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 $198 per square foot of building area, against $230 across all office floor area on the roll.
Does the owner of 411 1ST 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 411 1ST AVE S 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) 5247800200 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 411 1ST AVE S?
Seattle / King County's published roll does not include owner names, so no owner is shown.
What companies have offices at 411 1ST AVE S?
30 active business locations at this building appear in Seattle / King County public records, including HNTB CORP, EVERCUE LLC, THE DANDY OF KING STREET CROSSING, DELTA E, OPTIMUM ENERGY CO WA LLC. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 411 1ST AVE S?
The Seattle / King County roll records 154,159 sq ft of building area, 7 floors, a build year of 1913.
What is the assessed value of 411 1ST AVE S?
$30,460,000 on the Seattle / King County roll. Assessed values are taxable-roll figures, not market prices.
What is the parcel (major-minor) for 411 1ST AVE S?
Parcel (major-minor) 5247800200, site address 411 1ST 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 411 1ST 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) 5247800200.
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, “411 1ST AVE S, Seattle, WA (parcel (major-minor) 5247800200)”, https://buildingcensus.com/offices/seattle/office-building-e22b2475 (data as of September 20, 2026).