1077 30TH ST NW # 100
Office · Washington · 20007
At a glance
1077 30TH ST NW # 100 in Washington, DC is listed on the Washington, DC property roll as “Office”, SSL 11922078. The roll records 16,430 sq ft of building area, a 1980 build year and an assessed value of $2,517,160. 7 active business locations at this address appear in public records.
Public record — 7 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| John Ritch | 514 | Aug 2026 | DC business licence | address match · high |
| Phosphorous, LLC | — | Jun 2026 | DC business licence | address · medium |
| DI CAPUA - 1077 30TH ST NW #304 | 304 | May 2026 | DC business licence | address match · high |
| Artmonger Inc. | UNIT 411 | Apr 2026 | DC business licence | address match · high |
| C/O SANTHY MALLIOS | 00414 | Mar 2026 | DC business licence | address · medium |
| ATTACHE PROPERTY MANAGEMENT | — | Jan 2025 | DC business licence | address match · high |
| Manan Mahadevia | 708 | Oct 2023 | DC business licence | address match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 11922078 |
| Site address | 1077 30TH ST NW # 100 |
| Land use (DOR) | 057 — Office |
| Building area (actual) | 16,430 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 4,016 sq ft |
| Year built | 1980 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $2,517,160 |
Recorded owner (assessment roll)
PHOSPHOROUS LLC
EMPIRE LEASING INC
Owner mailing address: 1627 K ST NW # LL, WASHINGTON, DC, 20006
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.
7 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
- 1077 30TH ST NW # 100
- City
- Washington
- ZIP
- 20007
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 1077 30TH ST NW # 100 compare with other Washington office buildings?
At 16,430 sq ft, 1077 30TH ST NW # 100 is less than a fifth 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 $153 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 1077 30TH ST NW # 100 hold other Washington office property?
PHOSPHOROUS 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.
7 Washington office properties (7 parcels, 339.8K sq ft) are recorded to 7 owner entities sharing this parcel's tax-bill mailing address. A shared mailing address is evidence of common ownership, not proof of it.
What does “Office” mean for this parcel?
The Washington, DC roll classifies SSL 11922078 as “Office” (use code 057). 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 1077 30TH ST NW # 100?
The recorded owner on the Washington, DC assessment roll (current) is PHOSPHOROUS LLC, EMPIRE LEASING INC. Owner mailing address on file: 1627 K ST NW # LL, WASHINGTON, DC, 20006.
What companies have offices at 1077 30TH ST NW # 100?
7 active business locations at this building appear in Washington, DC public records, including John Ritch, Phosphorous, LLC, DI CAPUA - 1077 30TH ST NW #304, Artmonger Inc., C/O SANTHY MALLIOS. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 1077 30TH ST NW # 100?
The Washington, DC roll records 16,430 sq ft of building area, a build year of 1980. It sits on a 4,016 sq ft lot.
What is the assessed value of 1077 30TH ST NW # 100?
$2,517,160 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 1077 30TH ST NW # 100?
SSL 11922078, site address 1077 30TH ST NW # 100, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 1077 30TH ST NW # 100
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 11922078.
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, “1077 30TH ST NW # 100, Washington, DC (SSL 11922078)”, https://buildingcensus.com/offices/dc/office-building-46194714 (data as of September 20, 2026).