600 MARYLAND AVE SW
Office (large) · Washington · 20024
At a glance
600 MARYLAND AVE SW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 04630820. The roll records a 2021 build year and an assessed value of $229,990,200. It last sold for $253,675,000 in Jun 2020. 10 active business locations at this address appear in public records.
Recorded transfers — county roll + state sale file
Sale history
| Recorded | Price | Qualification | Source | Instrument |
|---|---|---|---|---|
| Jun 2020 | $253,675,000 | not rated | County roll | — |
Prices are the consideration recorded in Washington, DC's public property records. Where a qualification code exists it is the assessor's judgement of whether a transfer was arm's length; transfers without one appear unrated rather than assumed clean. Whether a building is on the market today, and at what price, is not a public record and is not shown here — asking prices, listings and lease terms live in private commercial databases.
Public record — 10 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| SUN'S GALLERY | — | Jul 2026 | DC business licence | address match · high |
| JMA SOLUTIONS LLC. | 800E | May 2026 | DC business licence | address match · high |
| J. J. SUN CORPORATION | — | Mar 2026 | DC business licence | address match · high |
| LEIDOS, Inc. | 20024 | Feb 2026 | DC business licence | address match · high |
| LAZ PARKING MID-ATLANTIC LLCvia LAZ PARKING MID-ATLANTIC LLC. | — | Feb 2026 | DC business licence | address match · high |
| P17 Solutions LLC | — | Dec 2025 | DC business licence | address match · high |
| COSMO CAFE, INC. | — | Oct 2025 | DC business licence | address match · high |
| CEXEC, Inc. | — | Oct 2025 | DC business licence | address match · high |
| RICE BAR CAPITAL GALLERY | 105 W | Aug 2025 | DC business licence | address match · high |
| JLAN SOLUTIONS | 500 | Jul 2024 | DC business licence | address match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 04630820 |
| Site address | 600 MARYLAND AVE SW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | — |
| Floors / units / buildings | — / — / — |
| Lot size | 24,113 sq ft |
| Year built | 2021 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $229,990,200 |
Recorded owner (assessment roll)
SMITHSONIAN INSTITUTION
Owner mailing address: 1000 JEFFERSON DR SW, WASHINGTON, DC, 20560
Location
- Address
- 600 MARYLAND AVE SW
- City
- Washington
- ZIP
- 20024
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
What has happened at 600 MARYLAND AVE SW recently?
1 recorded transfer is on file for this parcel, the latest dated Jun 2020.
What does “Office (large)” mean for this parcel?
The Washington, DC roll classifies SSL 04630820 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 MARYLAND AVE SW?
The recorded owner on the Washington, DC assessment roll (current) is SMITHSONIAN INSTITUTION. Owner mailing address on file: 1000 JEFFERSON DR SW, WASHINGTON, DC, 20560.
What companies have offices at 600 MARYLAND AVE SW?
10 active business locations at this building appear in Washington, DC public records, including SUN'S GALLERY, JMA SOLUTIONS LLC., J. J. SUN CORPORATION, LEIDOS, Inc., LAZ PARKING MID-ATLANTIC LLC. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 600 MARYLAND AVE SW?
The Washington, DC roll records a build year of 2021. It sits on a 24,113 sq ft lot.
What is the assessed value of 600 MARYLAND AVE SW?
$229,990,200 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
When did 600 MARYLAND AVE SW last sell?
The last recorded transfer was in Jun 2020 for $253,675,000.
What is the SSL for 600 MARYLAND AVE SW?
SSL 04630820, site address 600 MARYLAND AVE SW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 600 MARYLAND AVE 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 04630820.
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 MARYLAND AVE SW, Washington, DC (SSL 04630820)”, https://buildingcensus.com/offices/dc/office-building-fd18e6c5 (data as of September 20, 2026).