400 C ST SW
Office (large) · Washington · 20024
At a glance
400 C ST SW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 04930808. The roll records 505,175 sq ft of building area, a 1982 build year and an assessed value of $78,742,090. 4 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.
Federal lease inventory — actual rent paid
Leases on public record
| Lease | Rentable sq ft | Annual rent | $/sq ft | Term | Options left |
|---|---|---|---|---|---|
| LDC12566 | 162,293 | $7,523,051 | $46.35 | Jan 2013 → Aug 2027 | — |
From the General Services Administration's monthly lease inventory: the rent the federal government actually pays, the square feet behind it, the dates, and the renewal options remaining. This is one tenant, not the market. Federal space is often fitted for a specific agency and leased on government terms, so treat it as a real, checkable data point rather than an asking rent for the building.
Public record — 4 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| N/A | — | Nov 2026 | DC business licence | folio match · high |
| TOASTED MELTED SUBS | — | Jun 2026 | DC business licence | folio match · high |
| 2 SISTERS DELI | — | Feb 2025 | DC business licence | folio match · high |
| Z BURGER MY OWN PIZZA | — | Jan 2025 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 04930808 |
| Site address | 400 C ST SW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 505,175 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 72,765 sq ft |
| Year built | 1982 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $78,742,090 |
Recorded owner (assessment roll)
FEDERAL CENTER OFFICE ASSOCIATES LLC
DONOHOE REAL ESTATE SVC
Owner mailing address: 7101 WISCONSIN AVE, BETHESDA, MD, 20814
8 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
- 400 C ST SW
- City
- Washington
- ZIP
- 20024
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 400 C ST SW compare with other Washington office buildings?
At 505,175 sq ft, 400 C ST SW is about 4 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 $156 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 400 C ST SW hold other Washington office property?
8 Washington office properties (8 parcels, 1.4M sq ft) are recorded to 7 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 400 C ST SW recently?
The federal government leases space here: 1 active lease in the GSA inventory, the latest expiring Aug 2027.
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 04930808 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 400 C ST SW?
The recorded owner on the Washington, DC assessment roll (current) is FEDERAL CENTER OFFICE ASSOCIATES LLC, DONOHOE REAL ESTATE SVC. Owner mailing address on file: 7101 WISCONSIN AVE, BETHESDA, MD, 20814.
What companies have offices at 400 C ST SW?
4 active business locations at this building appear in Washington, DC public records, including N/A, TOASTED MELTED SUBS, 2 SISTERS DELI, Z BURGER MY OWN PIZZA. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 400 C ST SW?
The Washington, DC roll records 505,175 sq ft of building area, a build year of 1982. It sits on a 72,765 sq ft lot.
What is the assessed value of 400 C ST SW?
$78,742,090 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 400 C ST SW?
SSL 04930808, site address 400 C ST SW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 400 C ST SW
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.
- U.S. General Services Administration — lease inventory — Active federal leases published monthly: annual rent actually paid, rentable square feet, effective and expiration dates, termination right, renewal options remaining and the lessor's name.
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 04930808.
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, “400 C ST SW, Washington, DC (SSL 04930808)”, https://buildingcensus.com/offices/dc/office-building-c5663234 (data as of September 20, 2026).