1150 CONNECTICUT AVE NW
Office (large) · Washington · 20036
At a glance
1150 CONNECTICUT AVE NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 01610038. The roll records 246,682 sq ft of building area, a 1975 build year and an assessed value of $44,646,460. 13 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 — 13 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| Centene | — | Aug 2026 | DC business licence | folio match · high |
| ROIG COMMUNICATIONS LLC | — | May 2026 | DC business licence | folio match · high |
| Mighty Earth, Inc. | — | Mar 2026 | DC business licence | folio match · high |
| Heritage Reporting Corporation | — | Oct 2025 | DC business licence | folio match · high |
| Ability Culinary, | — | Oct 2025 | DC business licence | folio match · high |
| IDEACREW, INC | 710 | Sep 2025 | DC business licence | folio match · high |
| Northwestern Development Company B, LLC | — | Aug 2025 | DC business licence | folio match · high |
| AMERICAN HEART ASSOCIATION INCvia AMERICAN HEART ASSOCIATION INC. | 300 | Aug 2025 | DC business licence | folio match · high |
| SENTENCING PROJECT (THE) | — | Apr 2025 | DC business licence | folio match · high |
| Smith Garson, | — | Feb 2025 | DC business licence | folio match · high |
| BL 1150 Connecticut DC LLC. | — | Oct 2024 | DC business licence | folio match · high |
| BLAKE REAL ESTATE INC. | 801 | Apr 2024 | DC business licence | folio match · high |
| A Visual Affair | — | Mar 2023 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 01610038 |
| Site address | 1150 CONNECTICUT AVE NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 246,682 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 15,118 sq ft |
| Year built | 1975 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $44,646,460 |
Recorded owner (assessment roll)
NORTHWESTERN DEVELOPMENT COMPANY B
Owner mailing address: 1150 CONNECTICUT AVE NW SUITE 801, WASHINGTON, DC, 20036
5 Washington office properties share this owner mailing address →
Commercial property is usually held one building per entity; a shared mailbox is how the roll reveals a portfolio. It is evidence of common ownership, not proof.
Location
- Address
- 1150 CONNECTICUT AVE NW
- City
- Washington
- ZIP
- 20036
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 1150 CONNECTICUT AVE NW compare with other Washington office buildings?
At 246,682 sq ft, 1150 CONNECTICUT AVE NW is about twice 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 $181 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 1150 CONNECTICUT AVE NW hold other Washington office property?
5 Washington office properties (5 parcels, 2.2M sq ft) are recorded to 5 owner entities sharing this parcel's tax-bill mailing address. A shared mailing address is evidence of common ownership, not proof of it.
What has happened at 1150 CONNECTICUT 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 01610038 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 1150 CONNECTICUT AVE NW?
The recorded owner on the Washington, DC assessment roll (current) is NORTHWESTERN DEVELOPMENT COMPANY B. Owner mailing address on file: 1150 CONNECTICUT AVE NW SUITE 801, WASHINGTON, DC, 20036.
What companies have offices at 1150 CONNECTICUT AVE NW?
13 active business locations at this building appear in Washington, DC public records, including Centene, ROIG COMMUNICATIONS LLC, Mighty Earth, Inc., Heritage Reporting Corporation, Ability Culinary,. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 1150 CONNECTICUT AVE NW?
The Washington, DC roll records 246,682 sq ft of building area, a build year of 1975. It sits on a 15,118 sq ft lot.
What is the assessed value of 1150 CONNECTICUT AVE NW?
$44,646,460 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 1150 CONNECTICUT AVE NW?
SSL 01610038, site address 1150 CONNECTICUT AVE NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 1150 CONNECTICUT 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 01610038.
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, “1150 CONNECTICUT AVE NW, Washington, DC (SSL 01610038)”, https://buildingcensus.com/offices/dc/office-building-1693522c (data as of September 20, 2026).