1666 CONNECTICUT AVE NW
Office (large) · Washington · 20009
At a glance
1666 CONNECTICUT AVE NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 00930830. The roll records 113,302 sq ft of building area, a 1962 build year and an assessed value of $15,750,000. It last sold for $15,750,000 in Apr 2025. 6 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.
Recorded transfers — county roll + state sale file
Sale history
| Recorded | Price | Qualification | Source | Instrument |
|---|---|---|---|---|
| Apr 2025 | $15,750,000 | not rated | County roll | — |
| Jun 2019 | $30,500,000 | 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 — 6 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| WASHINGTON OFFICE ON LATIN AMERICA | #400 | Jul 2026 | DC business licence | folio match · high |
| 1666 Connecticut LLC | — | Jun 2026 | DC business licence | folio match · high |
| SETTE OSTERIA | — | May 2026 | DC business licence | folio match · high |
| The Choral Arts Society of Washington | — | Nov 2025 | DC business licence | folio match · high |
| TECH TURN UP ASSOC | — | Jun 2025 | DC business licence | folio match · high |
| Carlton Companies | — | Feb 2023 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 00930830 |
| Site address | 1666 CONNECTICUT AVE NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 113,302 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 13,039 sq ft |
| Year built | 1962 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $15,750,000 |
Recorded owner (assessment roll)
1666 CONNECTICUT LLC
Owner mailing address: 1111 BRICKELL AVE STE 2175, MIAMI, FL, 33131
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
- 1666 CONNECTICUT AVE NW
- City
- Washington
- ZIP
- 20009
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 1666 CONNECTICUT AVE NW compare with other Washington office buildings?
At 113,302 sq ft, 1666 CONNECTICUT AVE NW is roughly 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 $139 per square foot of building area, against $370 across all office floor area on the roll.
The last recorded sale priced it at $139 per square foot.
Does the owner of 1666 CONNECTICUT AVE NW hold other Washington office property?
1666 CONNECTICUT 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, 537.8K sq ft) are recorded to 5 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 1666 CONNECTICUT AVE NW recently?
2 recorded transfers are on file for this parcel, the latest dated Apr 2025.
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 00930830 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 1666 CONNECTICUT AVE NW?
The recorded owner on the Washington, DC assessment roll (current) is 1666 CONNECTICUT LLC. Owner mailing address on file: 1111 BRICKELL AVE STE 2175, MIAMI, FL, 33131.
What companies have offices at 1666 CONNECTICUT AVE NW?
6 active business locations at this building appear in Washington, DC public records, including WASHINGTON OFFICE ON LATIN AMERICA, 1666 Connecticut LLC, SETTE OSTERIA, The Choral Arts Society of Washington, TECH TURN UP ASSOC. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 1666 CONNECTICUT AVE NW?
The Washington, DC roll records 113,302 sq ft of building area, a build year of 1962. It sits on a 13,039 sq ft lot.
What is the assessed value of 1666 CONNECTICUT AVE NW?
$15,750,000 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
When did 1666 CONNECTICUT AVE NW last sell?
The last recorded transfer was in Apr 2025 for $15,750,000 ($139 per square foot).
What is the SSL for 1666 CONNECTICUT AVE NW?
SSL 00930830, site address 1666 CONNECTICUT AVE NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 1666 CONNECTICUT AVE NW
- Washington, DC office buildings· 1,761 buildings
- 1399 EXECUTIVE TOWER LLC· 5 properties
- WASHINGTON OFFICE ON LATIN AMERICA· suite #400
- 1666 Connecticut LLC· tenant on record
- SETTE OSTERIA· tenant on record
- The Choral Arts Society of Washington· 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 00930830.
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, “1666 CONNECTICUT AVE NW, Washington, DC (SSL 00930830)”, https://buildingcensus.com/offices/dc/office-building-4a315b03 (data as of September 20, 2026).