AW WESTSIDE MEDICAL PARK LLC
11 office properties in Boston recorded to 9 owner entities mailing to 2001 ROSS AVE STE 3400, DALLAS, TX. shared mailing address
At a glance
AW WESTSIDE MEDICAL PARK LLC is recorded as the owner of 11 office properties (11 parcels) in Boston, totalling 5.2M sq ft of building area with $1.3B of assessed value. The holdings sit in 9 owner entities that share one tax-bill mailing address in DALLAS, TX — evidence of common ownership, not proof of it.
County assessment roll
Properties
| Building | Submarket | Sq ft | Assessed | Last sold | Tenants |
|---|---|---|---|---|---|
| Williams Tower owner on site | Houston | 2M | $286.2M | — | 57 |
| 811 MAIN ST | Houston | 1.4M | $428.4M | — | 14 |
| 16 Chestnut Pl | Denver | 688.2K | $218.9M | $18,000,000 · Jun 2016 | 0 |
| 15011 KATY FWY | Houston | 342.4K | $23.5M | — | 4 |
| 1515 Wnkoop Street | Denver | 334.7K | $148.7M | $171,937,500 · Mar 2015 | 0 |
| 36 44 BROAD ST | Boston | 310.4K | $115.2M | $150,300,000 · Jun 2016 | 0 |
| 3700 WASHINGTON ST | Hollywood | 60.5K | $13M | — | 0 |
| 180-220 SW 84 AVE | Plantation | 49.1K | $9.4M | — | 0 |
| 5901 COLONIAL DR | Margate | 37.7K | $8.5M | — | 0 |
| 260 SW 84 AVE | Plantation | 13.7K | $3.1M | — | 0 |
| 140 SW 84 AVE | Plantation | 13.7K | $3.3M | — | 0 |
Names on the deeds
Owner entities at this address
- WILLIAMS TOWER LP
- BG HOLDCO LLC % INVESCO ADVISORS INC
- CHESTNUT DENVER INC
- EC OWNER 2 LP % INVESCO ADVISERS INC
- WYNKOOP OWNER LLC
- 40 BROAD STREET OWNER INC
- AW MEMORIAL SOUTH LLC
- AW WESTSIDE MEDICAL PARK LLC
- AW NORTHWEST MEDICAL ARTS LLC
How this group was built. These entities share a mailing address but not a name root. That often means one sponsor, and can also mean a shared law firm, accountant or tax servicer.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. 1of these properties also carry a business-tax receipt in the owner's own name, which is the public record's way of showing an owner-occupier rather than a landlord. Lease terms, rents and the identity of a manager acting for the owner are not public records and are not shown.
Where are AW WESTSIDE MEDICAL PARK LLC's office buildings?
The 11 properties are spread across 6 cities, led by Houston (3), Plantation (3), Denver (2).
The largest is Williams Tower in Houston at 2M sq ft.
Recorded build years run from 1923 to 2016.
How large is this portfolio within Boston's office market?
Its 5.2M sq ft is 7.41% of the 70.4M sq ft of office building area on the Boston roll.
Its $1.3B of assessed value is 3.81% of the metro's office total.
It holds 11 of the metro's 1,046 office buildings.
3 of its parcels carry a recorded sale price; the most recent was 36 44 BROAD ST in Jun 2016 for $150,300,000.
1 parcel also carries a business-tax receipt in the owner's own name — an owner-occupier rather than a landlord.
Frequently asked questions
How many office buildings does AW WESTSIDE MEDICAL PARK LLC own in Boston?
11 office properties (11 parcels) on the Boston roll, counted by building rather than by condo parcel.
What is AW WESTSIDE MEDICAL PARK LLC's largest office building?
Williams Tower, Houston — 2M sq ft, assessed at $286.2M.
What are AW WESTSIDE MEDICAL PARK LLC's office properties worth?
Their combined assessed value on the current Boston roll is $1,258,280,238. Assessed values are taxable-roll figures, not market prices.
Are these properties owned by one company?
These entities share a mailing address but not a name root. That often means one sponsor, and can also mean a shared law firm, accountant or tax servicer. 9 owner entities share the mailing address. It is evidence of common ownership, not proof of it.
When did one of AW WESTSIDE MEDICAL PARK LLC's Boston office properties last change hands?
The most recent recorded transfer among these parcels is 36 44 BROAD ST, Jun 2016, for $150,300,000.
Related
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- Boston — MassGIS L3 standardized parcels with the city assessment roll (owner names, mailing addresses, stories, assessed values, last recorded sale). Boston publishes no universal business roll, so no tenant layer is possible from public records here.
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: MassGIS L3 standardized parcels with the city assessment roll (Boston), as published September 20, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “AW WESTSIDE MEDICAL PARK LLC — Boston office property holdings”, https://buildingcensus.com/offices/boston/owners/aw-westside-medical-park-llc-caa6b2 (data as of September 20, 2026).