1101 K ST NW
Office (large) · Washington · 20005
At a glance
1101 K ST NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 03160035. The roll records 453,141 sq ft of building area, a 2007 build year and an assessed value of $135,089,250. 5 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.
Public record — 5 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| USAGAINSTALZHEIMER'S | 400 | Jul 2026 | DC business licence | folio match · high |
| The American Advertising Foundation | — | Oct 2025 | DC business licence | folio match · high |
| EVIDENCE ACTION, INC. | 900 | Jul 2025 | DC business licence | folio match · high |
| CITIZENS FOR RESPONSIBILITY AND ETHICS IN WASHINGTON | 201 | Apr 2025 | DC business licence | folio match · high |
| RG-1101K | — | Jul 2023 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 03160035 |
| Site address | 1101 K ST NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 453,141 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 28,827 sq ft |
| Year built | 2007 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $135,089,250 |
Recorded owner (assessment roll)
RG-1101 K LLC
Owner mailing address: PO BOX 1368, CARLSBAD, CA, 92018
9 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
- 1101 K ST NW
- City
- Washington
- ZIP
- 20005
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 1101 K ST NW compare with other Washington office buildings?
At 453,141 sq ft, 1101 K ST NW 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 $298 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 1101 K ST NW hold other Washington office property?
9 Washington office properties (9 parcels, 2.1M 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 1101 K ST NW recently?
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 03160035 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 1101 K ST NW?
The recorded owner on the Washington, DC assessment roll (current) is RG-1101 K LLC. Owner mailing address on file: PO BOX 1368, CARLSBAD, CA, 92018.
What companies have offices at 1101 K ST NW?
5 active business locations at this building appear in Washington, DC public records, including USAGAINSTALZHEIMER'S, The American Advertising Foundation, EVIDENCE ACTION, INC., CITIZENS FOR RESPONSIBILITY AND ETHICS IN WASHINGTON, RG-1101K. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 1101 K ST NW?
The Washington, DC roll records 453,141 sq ft of building area, a build year of 2007. It sits on a 28,827 sq ft lot.
What is the assessed value of 1101 K ST NW?
$135,089,250 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 1101 K ST NW?
SSL 03160035, site address 1101 K ST NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 1101 K ST NW
- Washington, DC office buildings· 1,761 buildings
- BRI 1870 NORTH POINT LLC· 9 properties
- USAGAINSTALZHEIMER'S· suite 400
- The American Advertising Foundation· tenant on record
- EVIDENCE ACTION, INC.· suite 900
- CITIZENS FOR RESPONSIBILITY AND ETHICS IN WASHINGTON· suite 201
- 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 03160035.
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, “1101 K ST NW, Washington, DC (SSL 03160035)”, https://buildingcensus.com/offices/dc/office-building-db5e9fdb (data as of September 20, 2026).