500 C ST SW
Office (large) · Washington · 20024
At a glance
500 C ST SW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 04930806. The roll records 436,223 sq ft of building area, a 1981 build year and an assessed value of $98,947,630.
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 |
|---|---|---|---|---|---|
| LDC02139 | 303,546 | $14,172,963 | $46.69 | Aug 2009 → 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. A fully serviced lease includes services and utilities, so it is not comparable to a net rent. 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 — 0 matched business locations
Tenants & business locations
No active business locations at this address appear in the public records ingested so far. That is a statement about the records, not the building: tenants without a county business-tax receipt or a Florida registration at this address are invisible to public data.
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 04930806 |
| Site address | 500 C ST SW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 436,223 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 46,090 sq ft |
| Year built | 1981 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $98,947,630 |
Recorded owner (assessment roll)
FEDERAL CENTER OFFICE ASSOCIATES LLC
DONOHOE REAL ESTATE SERVICES
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
- 500 C ST SW
- City
- Washington
- ZIP
- 20024
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 500 C ST SW compare with other Washington office buildings?
At 436,223 sq ft, 500 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 $227 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 500 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 500 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 04930806 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 500 C ST SW?
The recorded owner on the Washington, DC assessment roll (current) is FEDERAL CENTER OFFICE ASSOCIATES LLC, DONOHOE REAL ESTATE SERVICES. Owner mailing address on file: 7101 WISCONSIN AVE, BETHESDA, MD, 20814.
What companies have offices at 500 C ST SW?
No business locations at this building appear in the public records ingested so far — no licence, tax or registry record currently lists this address; that is a gap in the record, not proof the building is empty.
How big is 500 C ST SW?
The Washington, DC roll records 436,223 sq ft of building area, a build year of 1981. It sits on a 46,090 sq ft lot.
What is the assessed value of 500 C ST SW?
$98,947,630 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 500 C ST SW?
SSL 04930806, site address 500 C ST SW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 500 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 04930806.
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, “500 C ST SW, Washington, DC (SSL 04930806)”, https://buildingcensus.com/offices/dc/office-building-ea1a0e21 (data as of September 20, 2026).