101 CONSTITUTION AVE NW
Office (large) · Washington · 20001
At a glance
101 CONSTITUTION AVE NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 05740025. The roll records 561,068 sq ft of building area, a 2002 build year and an assessed value of $356,163,160. 12 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 — 12 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| NATIONAL MINING ASSOCIATION | Suite 500 | Aug 2026 | DC business licence | folio match · high |
| HROD, INC | — | Jul 2026 | DC business licence | folio match · high |
| LEIDOS, Inc. | — | Feb 2026 | DC business licence | folio match · high |
| 101 Constitution Management | — | Dec 2025 | DC business licence | folio match · high |
| Capitol Tax Partners, LLP | 675 East | Jul 2025 | DC business licence | folio match · high |
| KSH COMPANY INC. | — | Jul 2025 | DC business licence | folio match · high |
| WINSTON GROUP, LTD. (THE) | 710 E | Apr 2025 | DC business licence | folio match · high |
| AMERESCO, INCvia AMERESCO INC. | 410 | Feb 2025 | DC business licence | folio match · high |
| WINNING THE ISSUES | — | Dec 2024 | DC business licence | folio match · high |
| MGS | — | Mar 2024 | DC business licence | folio match · high |
| 101 CONSTITUTION | — | Jan 2024 | DC business licence | folio match · high |
| Charlie Palmer Steak | — | May 2023 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 05740025 |
| Site address | 101 CONSTITUTION AVE NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 561,068 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 60,353 sq ft |
| Year built | 2002 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $356,163,160 |
Recorded owner (assessment roll)
UNITED BROTHERHOOD OF CARPENTERS AND JOINERS OF AMERICA
Owner mailing address: 101 CONSTITUTION AVE NW, WASHINGTON, DC, 20001
Location
- Address
- 101 CONSTITUTION AVE NW
- City
- Washington
- ZIP
- 20001
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 101 CONSTITUTION AVE NW compare with other Washington office buildings?
At 561,068 sq ft, 101 CONSTITUTION AVE NW is about 5 times the size of the average office building on the Washington, DC roll, which comes to 120,450 sq ft across 1,761 buildings.
Its assessed value works out to $635 per square foot of building area, against $370 across all office floor area on the roll.
What has happened at 101 CONSTITUTION AVE NW recently?
The building files energy-benchmarking disclosures — 1 report year are matched to this parcel.
What does “Office (large)” mean for this parcel?
The Washington, DC roll classifies SSL 05740025 as “Office (large)” (use code 052). 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 101 CONSTITUTION AVE NW?
The recorded owner on the Washington, DC assessment roll (current) is UNITED BROTHERHOOD OF CARPENTERS AND JOINERS OF AMERICA. Owner mailing address on file: 101 CONSTITUTION AVE NW, WASHINGTON, DC, 20001.
What companies have offices at 101 CONSTITUTION AVE NW?
12 active business locations at this building appear in Washington, DC public records, including NATIONAL MINING ASSOCIATION, HROD, INC, LEIDOS, Inc., 101 Constitution Management, Capitol Tax Partners, LLP. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 101 CONSTITUTION AVE NW?
The Washington, DC roll records 561,068 sq ft of building area, a build year of 2002. It sits on a 60,353 sq ft lot.
What is the assessed value of 101 CONSTITUTION AVE NW?
$356,163,160 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 101 CONSTITUTION AVE NW?
SSL 05740025, site address 101 CONSTITUTION AVE NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 101 CONSTITUTION AVE NW
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- Washington, DC — Integrated Tax System public extract (owner names, mailing addresses, assessments), CAMA commercial and daily sales tables, Basic Business Licenses (suite-level premises; the universal catch-all licence was repealed Oct 2025, thinning the roll thereafter), and DOEE energy benchmarking.
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: Washington, DC assessment roll, SSL 05740025.
About this data
Source: Integrated Tax System public extract (Washington, DC), as published September 20, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “101 CONSTITUTION AVE NW, Washington, DC (SSL 05740025)”, https://buildingcensus.com/offices/dc/office-building-42895c59 (data as of September 20, 2026).