1620 L STREET DC OWNER LLC
5 office properties in Washington, DC recorded to 4 owner entities mailing to PO BOX 130667, CARLSBAD, CA. likely one owner
At a glance
1620 L STREET DC OWNER LLC is recorded as the owner of 5 office properties (5 parcels) in Washington, DC, totalling 980.4K sq ft of building area with $329M of assessed value. The holdings sit in 4 owner entities that share one tax-bill mailing address in CARLSBAD, CA — and a name root, which is how a single sponsor usually holds property.
County assessment roll
Properties
| Building | Submarket | Sq ft | Assessed | Last sold | Tenants |
|---|---|---|---|---|---|
| 1505 WESTLAKE AVE N | Seattle | 381.5K | $47M | $118,300,000 · May 2019 | 12 |
| 1133 15TH ST NW | Washington | 286.2K | $51.3M | $100,500,000 · Oct 2017 | 6 |
| 1620 L ST NW | Washington | 160.9K | $74M | $98,500,000 · Mar 2017 | 2 |
| 1255 23RD ST NW | Washington | 83.3K | $136.1M | $166,208,804 · Jan 2018 | 6 |
| 2301 M ST NW | Washington | 68.4K | $20.6M | $11,194,229 · Dec 2025 | 5 |
Names on the deeds
Owner entities at this address
- DWF V 1133 15TH LLC
- 1620 L STREET DC OWNER LLC
- DWF V 1255 23RD STREET LLC
- CF ONE 2301 M HOLDINGS LLC
How this group was built. These entities share both a mailing address and a name root, which is how a single sponsor usually holds property — one entity per building.The county records an owner and a mailing address for every parcel; this page collects the office parcels whose owners mail to the same address, and counts buildings rather than parcels using the county's own condo-to-building link. Lease terms, rents and the identity of a manager acting for the owner are not public records and are not shown.
Where are 1620 L STREET DC OWNER LLC's office buildings?
The 5 properties are spread across 2 cities, led by Washington (4), Seattle (1).
The largest is 1505 WESTLAKE AVE N in Seattle at 381.5K sq ft over 10 floors.
Recorded build years run from 1969 to 1994.
How large is this portfolio within Washington's office market?
Its 980.4K sq ft is 0.46% of the 212.1M sq ft of office building area on the Washington, DC roll.
Its $329M of assessed value is 0.42% of the metro's office total.
It holds 5 of the metro's 1,761 office buildings.
5 of its parcels carry a recorded sale price; the most recent was 2301 M ST NW in Dec 2025 for $11,194,229.
Frequently asked questions
How many office buildings does 1620 L STREET DC OWNER LLC own in Washington?
5 office properties (5 parcels) on the Washington, DC roll, counted by building rather than by condo parcel.
What is 1620 L STREET DC OWNER LLC's largest office building?
1505 WESTLAKE AVE N, Seattle — 381.5K sq ft, assessed at $47M.
What are 1620 L STREET DC OWNER LLC's office properties worth?
Their combined assessed value on the current Washington, DC roll is $329,031,790. Assessed values are taxable-roll figures, not market prices.
Are these properties owned by one company?
These entities share both a mailing address and a name root, which is how a single sponsor usually holds property — one entity per building. 4 owner entities share the mailing address. It is evidence of common ownership, not proof of it.
When did one of 1620 L STREET DC OWNER LLC's Washington office properties last change hands?
The most recent recorded transfer among these parcels is 2301 M ST NW, Dec 2025, for $11,194,229.
Related
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.
Dataset updated . Derived from public data sources.
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, “1620 L STREET DC OWNER LLC — Washington office property holdings”, https://buildingcensus.com/offices/dc/owners/1620-l-street-dc-owner-llc-729334 (data as of September 20, 2026).