4900 MASSACHUSETTS AVE NW
Office (large) · Washington · 20016
At a glance
4900 MASSACHUSETTS AVE NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 14670883. The roll records 38,180 sq ft of building area, a 1961 build year and an assessed value of $7,082,000. 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 |
|---|---|---|---|---|
| SPRING VALLEY | — | Aug 2026 | DC business licence | folio match · high |
| BLUEBAY OFFICE | 330 | Nov 2025 | DC business licence | folio match · high |
| Lindamood-Bell Learning Processes | — | Jun 2025 | DC business licence | folio match · high |
| CAPITAL PILATES STUDIO LLC | 310 | Jun 2025 | DC business licence | folio match · high |
| COLONIAL PARKING | — | Mar 2025 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 14670883 |
| Site address | 4900 MASSACHUSETTS AVE NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 38,180 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 31,599 sq ft |
| Year built | 1961 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $7,082,000 |
Recorded owner (assessment roll)
WC AND AN MILLER DEVELOPMENT COMPANY
Owner mailing address: 11921 ROCKVILLE PIKE STE 200, ROCKVILLE, MD, 20852
4 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
- 4900 MASSACHUSETTS AVE NW
- City
- Washington
- ZIP
- 20016
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 4900 MASSACHUSETTS AVE NW compare with other Washington office buildings?
At 38,180 sq ft, 4900 MASSACHUSETTS AVE NW is about 68% smaller than 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 $185 per square foot of building area, against $370 across all office floor area on the roll.
Does the owner of 4900 MASSACHUSETTS AVE NW hold other Washington office property?
4 Washington office properties (4 parcels, 153.2K sq ft) are recorded to an owner 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 4900 MASSACHUSETTS AVE 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 14670883 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 4900 MASSACHUSETTS AVE NW?
The recorded owner on the Washington, DC assessment roll (current) is WC AND AN MILLER DEVELOPMENT COMPANY. Owner mailing address on file: 11921 ROCKVILLE PIKE STE 200, ROCKVILLE, MD, 20852.
What companies have offices at 4900 MASSACHUSETTS AVE NW?
5 active business locations at this building appear in Washington, DC public records, including SPRING VALLEY, BLUEBAY OFFICE, Lindamood-Bell Learning Processes, CAPITAL PILATES STUDIO LLC, COLONIAL PARKING. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 4900 MASSACHUSETTS AVE NW?
The Washington, DC roll records 38,180 sq ft of building area, a build year of 1961. It sits on a 31,599 sq ft lot.
What is the assessed value of 4900 MASSACHUSETTS AVE NW?
$7,082,000 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
What is the SSL for 4900 MASSACHUSETTS AVE NW?
SSL 14670883, site address 4900 MASSACHUSETTS AVE NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 4900 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 14670883.
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, “4900 MASSACHUSETTS AVE NW, Washington, DC (SSL 14670883)”, https://buildingcensus.com/offices/dc/office-building-e445ac57 (data as of September 20, 2026).