550 12TH ST SW
Office (large) · Washington · 20024
At a glance
550 12TH ST SW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 03270841. The roll records 539,713 sq ft of building area, a 2002 build year and an assessed value of $129,478,702. 2 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 — 2 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| FEDERAL PARKING INCORPORATED | — | Apr 2025 | DC business licence | folio match · high |
| DEPT OF ED | 7TH FL | Mar 2025 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 03270841 |
| Site address | 550 12TH ST SW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 539,713 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 67,047 sq ft |
| Year built | 2002 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $129,478,702 |
Recorded owner (assessment roll)
POTOMAC CENTER CF LLC
Owner mailing address: PO BOX 23275, WASHINGTON, DC, 20026
2 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
- 550 12TH ST SW
- City
- Washington
- ZIP
- 20024
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 550 12TH ST SW compare with other Washington office buildings?
At 539,713 sq ft, 550 12TH 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 $240 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 550 12TH ST SW hold other Washington office property?
2 Washington office properties (2 parcels, 1.2M sq ft) are recorded to 2 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 550 12TH ST SW 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 03270841 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 550 12TH ST SW?
The recorded owner on the Washington, DC assessment roll (current) is POTOMAC CENTER CF LLC. Owner mailing address on file: PO BOX 23275, WASHINGTON, DC, 20026.
What companies have offices at 550 12TH ST SW?
2 active business locations at this building appear in Washington, DC public records, including FEDERAL PARKING INCORPORATED, DEPT OF ED. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 550 12TH ST SW?
The Washington, DC roll records 539,713 sq ft of building area, a build year of 2002. It sits on a 67,047 sq ft lot.
What is the assessed value of 550 12TH ST SW?
$129,478,702 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 550 12TH ST SW?
SSL 03270841, site address 550 12TH ST SW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 550 12TH 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.
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 03270841.
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, “550 12TH ST SW, Washington, DC (SSL 03270841)”, https://buildingcensus.com/offices/dc/office-building-c790b090 (data as of September 20, 2026).