600 MASSACHUSETTS AVE NW
Office (large) · Washington · 20001
At a glance
600 MASSACHUSETTS AVE NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 04520836. The roll records 379,921 sq ft of building area, a 2016 build year and an assessed value of $249,452,780. 14 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 — 14 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| N/A | — | Nov 2026 | DC business licence | folio match · high |
| Optima Kitchen & Bath | — | May 2026 | DC business licence | folio match · high |
| Captivate Perspectives Corporation | — | May 2026 | DC business licence | folio match · high |
| PARKING MANAGEMENT INC.via PARKING MANAGEMENT INC | — | Dec 2025 | DC business licence | folio match · high |
| American Academy for Strategic Education | — | Aug 2025 | DC business licence | folio match · high |
| District Fleet e-Mobility | — | Apr 2025 | DC business licence | folio match · high |
| SEASONS CULINARY SERVICE INC. | — | Mar 2025 | DC business licence | folio match · high |
| Cavalier Logistics Corporation | — | Mar 2025 | DC business licence | folio match · high |
| SQUARE 452, LLC | — | Jan 2025 | DC business licence | folio match · high |
| Carolina Canyon | — | Dec 2024 | DC business licence | folio match · high |
| FARMERS & DISTILLERS, FOUNDING SPIRITS DISTILLERY | 100 | Dec 2024 | DC business licence | folio match · high |
| SEER Solutions | — | Nov 2024 | DC business licence | folio match · high |
| Aecon Capital Joint Venture | — | Jun 2024 | DC business licence | folio match · high |
| Konterra Realty | — | Dec 2022 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 04520836 |
| Site address | 600 MASSACHUSETTS AVE NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 379,921 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 45,078 sq ft |
| Year built | 2016 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $249,452,780 |
Recorded owner (assessment roll)
SQUARE 452 LLC
GOULD PROPERTY COMPANY
Owner mailing address: 1725 DESALES ST NW STE 900, WASHINGTON, DC, 20036
The owner is on site.A business-tax receipt at this address is held in the owner's own name, so the public record shows an owner-occupier rather than a landlord letting the space.
5 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
- 600 MASSACHUSETTS AVE NW
- City
- Washington
- ZIP
- 20001
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 600 MASSACHUSETTS AVE NW compare with other Washington office buildings?
At 379,921 sq ft, 600 MASSACHUSETTS AVE NW is about 3 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 $657 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 600 MASSACHUSETTS AVE NW hold other Washington office property?
SQUARE 452 LLC also holds a business-tax receipt at this address, so the public record shows an owner-occupier rather than a landlord letting the space.
5 Washington office properties (5 parcels, 388.3K sq ft) are recorded to 4 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 600 MASSACHUSETTS AVE 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 04520836 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 600 MASSACHUSETTS AVE NW?
The recorded owner on the Washington, DC assessment roll (current) is SQUARE 452 LLC, GOULD PROPERTY COMPANY. Owner mailing address on file: 1725 DESALES ST NW STE 900, WASHINGTON, DC, 20036.
What companies have offices at 600 MASSACHUSETTS AVE NW?
14 active business locations at this building appear in Washington, DC public records, including N/A, Optima Kitchen & Bath, Captivate Perspectives Corporation, PARKING MANAGEMENT INC., American Academy for Strategic Education. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 600 MASSACHUSETTS AVE NW?
The Washington, DC roll records 379,921 sq ft of building area, a build year of 2016. It sits on a 45,078 sq ft lot.
What is the assessed value of 600 MASSACHUSETTS AVE NW?
$249,452,780 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 600 MASSACHUSETTS AVE NW?
SSL 04520836, site address 600 MASSACHUSETTS AVE NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 600 MASSACHUSETTS AVE NW
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 04520836.
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, “600 MASSACHUSETTS AVE NW, Washington, DC (SSL 04520836)”, https://buildingcensus.com/offices/dc/office-building-1294aa4b (data as of September 20, 2026).