601 13TH ST NW
Office (large) · Washington · 20005
At a glance
601 13TH ST NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 02890830. The roll records 678,600 sq ft of building area, a 1990 build year and an assessed value of $290,609,630. 23 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 — 23 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| United States Pharmacopeial Convention (The) | — | Nov 2026 | DC business licence | folio match · high |
| New American Industrial Alliance; NAIA | — | Jul 2026 | DC business licence | folio match · high |
| MILLS BUILDING ASSOCIATES, LLC. (THE) | 300N | Mar 2026 | DC business licence | folio match · high |
| AMBIENT RESOURCES LLC. | — | Feb 2026 | DC business licence | folio match · high |
| JOHN AKRIDGE COMPANY (THE) | 300 N | Feb 2026 | DC business licence | folio match · high |
| Signature Restoration & Build | — | Jan 2026 | DC business licence | folio match · high |
| AI Verification And Evaluation Research Institute | — | Dec 2025 | DC business licence | folio match · high |
| PreventX AI LLC | — | Dec 2025 | DC business licence | folio match · high |
| Webber Infrastructure Mgmnt, Inc | 12th Flr | Dec 2025 | DC business licence | folio match · high |
| The John Akridge Company LLC | — | Oct 2025 | DC business licence | folio match · high |
| The John Akridge Development Company LLC | — | Oct 2025 | DC business licence | folio match · high |
| The John Akridge Management Company LLC | — | Oct 2025 | DC business licence | folio match · high |
| Panera Breadvia PANERA BREAD | — | Oct 2025 | DC business licence | folio match · high |
| Acorn Consulting | — | Sep 2025 | DC business licence | folio match · high |
| The Stagecoach Group | — | Sep 2025 | DC business licence | folio match · high |
| CATHOLICS FOR CHOICE | — | Apr 2025 | DC business licence | folio match · high |
| JENNINGS POLICY STRATEGIES | — | Mar 2025 | DC business licence | folio match · high |
| Ballard Partners Inc. | — | Feb 2025 | DC business licence | folio match · high |
| IBEW HEADQUARTERS BUILDING LLC | 300N | Jan 2025 | DC business licence | folio match · high |
| ATI Advisory | — | Jan 2025 | DC business licence | folio match · high |
| TJ Maxx #1206 | — | Mar 2024 | DC business licence | folio match · high |
| Coffee Republic | — | Oct 2023 | DC business licence | folio match · high |
| In Our Own Voice Action Fund | — | May 2023 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 02890830 |
| Site address | 601 13TH ST NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 678,600 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 43,243 sq ft |
| Year built | 1990 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $290,609,630 |
Recorded owner (assessment roll)
S KANN SONS COMPANY
JOHN AKRIDGE CO
Owner mailing address: 601 13TH ST NW STE 300N, WASHINGTON, DC, 20005
10 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
- 601 13TH ST NW
- City
- Washington
- ZIP
- 20005
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 601 13TH ST NW compare with other Washington office buildings?
At 678,600 sq ft, 601 13TH ST NW is about 6 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 $428 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 601 13TH ST NW hold other Washington office property?
10 Washington office properties (10 parcels, 2M sq ft) are recorded to 10 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 601 13TH ST NW 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 02890830 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 601 13TH ST NW?
The recorded owner on the Washington, DC assessment roll (current) is S KANN SONS COMPANY, JOHN AKRIDGE CO. Owner mailing address on file: 601 13TH ST NW STE 300N, WASHINGTON, DC, 20005.
What companies have offices at 601 13TH ST NW?
23 active business locations at this building appear in Washington, DC public records, including United States Pharmacopeial Convention (The), New American Industrial Alliance; NAIA, MILLS BUILDING ASSOCIATES, LLC. (THE), AMBIENT RESOURCES LLC., JOHN AKRIDGE COMPANY (THE). Public records under-count tenants that don't hold a local receipt or register the address.
How big is 601 13TH ST NW?
The Washington, DC roll records 678,600 sq ft of building area, a build year of 1990. It sits on a 43,243 sq ft lot.
What is the assessed value of 601 13TH ST NW?
$290,609,630 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 601 13TH ST NW?
SSL 02890830, site address 601 13TH ST NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 601 13TH ST NW
- Washington, DC office buildings· 1,761 buildings
- 1025 VERMONT VENTURE OWNER LLC· 10 properties
- United States Pharmacopeial Convention (The)· tenant on record
- New American Industrial Alliance; NAIA· tenant on record
- MILLS BUILDING ASSOCIATES, LLC. (THE)· suite 300N
- AMBIENT RESOURCES LLC.· 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 02890830.
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, “601 13TH ST NW, Washington, DC (SSL 02890830)”, https://buildingcensus.com/offices/dc/office-building-a853b250 (data as of September 20, 2026).