2101 CONSTITUTION AVE NW
Office (large) · Washington · 20418
At a glance
2101 CONSTITUTION AVE NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 00880058. The roll records 109,303 sq ft of building area, a 1924 build year and an assessed value of $186,147,610. 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, 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 — 3 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| SEASONS CULINARY SERVICESvia Seasons Culinary Services, | — | Sep 2026 | DC business licence | folio match · high |
| NATIONAL ACADEMY OF ENGINEERING FUND (THE) | — | Mar 2026 | DC business licence | folio match · high |
| NATIONAL ACADEMY OF SCIENCES | — | Sep 2025 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 00880058 |
| Site address | 2101 CONSTITUTION AVE NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 109,303 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 189,756 sq ft |
| Year built | 1924 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $186,147,610 |
Recorded owner (assessment roll)
NATIONAL ACADEMY OF SCIENCES
Owner mailing address: 500 5TH ST NW, WASHINGTON, DC, 20001
The owner is on site.A business-tax receipt at this address is held in the owner's own name, so the public record shows an owner-occupier rather than a landlord letting the space.
Location
- Address
- 2101 CONSTITUTION AVE NW
- City
- Washington
- ZIP
- 20418
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 2101 CONSTITUTION AVE NW compare with other Washington office buildings?
At 109,303 sq ft, 2101 CONSTITUTION AVE NW is roughly 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 $1703 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 2101 CONSTITUTION AVE NW hold other Washington office property?
NATIONAL ACADEMY OF SCIENCES also holds a business-tax receipt at this address, so the public record shows an owner-occupier rather than a landlord letting the space.
What has happened at 2101 CONSTITUTION AVE NW recently?
The building files energy-benchmarking disclosures — 2 report years are matched to this parcel.
What does “Office (large)” mean for this parcel?
The Washington, DC roll classifies SSL 00880058 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 2101 CONSTITUTION AVE NW?
The recorded owner on the Washington, DC assessment roll (current) is NATIONAL ACADEMY OF SCIENCES. Owner mailing address on file: 500 5TH ST NW, WASHINGTON, DC, 20001.
What companies have offices at 2101 CONSTITUTION AVE NW?
3 active business locations at this building appear in Washington, DC public records, including SEASONS CULINARY SERVICES, NATIONAL ACADEMY OF ENGINEERING FUND (THE), NATIONAL ACADEMY OF SCIENCES. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 2101 CONSTITUTION AVE NW?
The Washington, DC roll records 109,303 sq ft of building area, a build year of 1924. It sits on a 189,756 sq ft lot.
What is the assessed value of 2101 CONSTITUTION AVE NW?
$186,147,610 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 2101 CONSTITUTION AVE NW?
SSL 00880058, site address 2101 CONSTITUTION AVE NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 2101 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 00880058.
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, “2101 CONSTITUTION AVE NW, Washington, DC (SSL 00880058)”, https://buildingcensus.com/offices/dc/office-building-ef23ba28 (data as of September 20, 2026).