122 C ST NW
Office (large) · Washington · 20001
At a glance
122 C ST NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 05740024. The roll records 128,076 sq ft of building area, a 1968 build year and an assessed value of $29,834,510. 9 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 3 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 — 9 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| LUTHERAN IMMIGRATION AND REFUGEE SERVICE INC | 125 | Aug 2026 | DC business licence | folio match · high |
| BACK ON MY FEET | 2440 | Apr 2026 | DC business licence | folio match · high |
| National Alliance of Forest Owners | 630 | Sep 2025 | DC business licence | folio match · high |
| SOUTHERN UTAH WILDERNESS ALLIANCE | — | Aug 2025 | DC business licence | folio match · high |
| ALASKA WILDERNESS LEAGUE | 650 | Jun 2025 | DC business licence | folio match · high |
| SOUTHERN ENVIRONMENTAL LAW CENTER | 390 | Feb 2025 | DC business licence | folio match · high |
| KCI ASSOCIATES OF THE DISTRICT OF COLUMBIA, P.C. | 500 | Jan 2025 | DC business licence | folio match · high |
| NTUF | — | Dec 2022 | DC business licence | folio match · high |
| NTU | — | Dec 2022 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 05740024 |
| Site address | 122 C ST NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 128,076 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 18,015 sq ft |
| Year built | 1968 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $29,834,510 |
Recorded owner (assessment roll)
ZG 122 C STREET LLC
Owner mailing address: 2 WISCONSIN CIR STE 1050, CHEVY CHASE, MD, 20815
11 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
- 122 C ST NW
- City
- Washington
- ZIP
- 20001
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 122 C ST NW compare with other Washington office buildings?
At 128,076 sq ft, 122 C ST 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 $233 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 122 C ST NW hold other Washington office property?
11 Washington office properties (11 parcels, 1.4M sq ft) are recorded to 11 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 122 C ST NW recently?
The building files energy-benchmarking disclosures — 3 report years are matched to this parcel.
What does “Office (large)” mean for this parcel?
The Washington, DC roll classifies SSL 05740024 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 122 C ST NW?
The recorded owner on the Washington, DC assessment roll (current) is ZG 122 C STREET LLC. Owner mailing address on file: 2 WISCONSIN CIR STE 1050, CHEVY CHASE, MD, 20815.
What companies have offices at 122 C ST NW?
9 active business locations at this building appear in Washington, DC public records, including LUTHERAN IMMIGRATION AND REFUGEE SERVICE INC, BACK ON MY FEET, National Alliance of Forest Owners, SOUTHERN UTAH WILDERNESS ALLIANCE, ALASKA WILDERNESS LEAGUE. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 122 C ST NW?
The Washington, DC roll records 128,076 sq ft of building area, a build year of 1968. It sits on a 18,015 sq ft lot.
What is the assessed value of 122 C ST NW?
$29,834,510 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 122 C ST NW?
SSL 05740024, site address 122 C ST NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 122 C ST NW
- Washington, DC office buildings· 1,761 buildings
- 1001 CONNECTICUT LLC· 11 properties
- LUTHERAN IMMIGRATION AND REFUGEE SERVICE INC· suite 125
- BACK ON MY FEET· suite 2440
- National Alliance of Forest Owners· suite 630
- SOUTHERN UTAH WILDERNESS ALLIANCE· tenant on record
- Federal office leases in DC
- Office census — all metros
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 05740024.
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, “122 C ST NW, Washington, DC (SSL 05740024)”, https://buildingcensus.com/offices/dc/office-building-54d3a091 (data as of September 20, 2026).