100 SUMMER ST
Office · Boston · 02110
At a glance
100 SUMMER ST in Boston, MA is listed on the Boston property roll as “Office”, parcel ID 0304220000. The roll records 1,344,121 sq ft of building area, 32 floors, a 1980 build year and an assessed value of $557,542,600. It last sold for $806,000,000 in Oct 2019.
The building's own benchmarking filing
Energy performance
From the building's own filing under its city's benchmarking ordinance. 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 |
|---|---|---|---|---|
| Oct 2019 | $806,000,000 | not rated | County roll | — |
Prices are the consideration recorded in Boston'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.
Boston assessment roll
Parcel record
| Field | Value |
|---|---|
| parcel ID | 0304220000 |
| Site address | 100 SUMMER ST |
| Land use (DOR) | 348 — Office |
| Building area (actual) | 1,344,121 sq ft |
| Floors / units / buildings | 32 / — / — |
| Lot size | 1 sq ft |
| Year built | 1980 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $557,542,600 |
Recorded owner (assessment roll)
100 SUMMER OWNER LLC
Owner mailing address: 500 BOYLSTON ST SUITE 2100, BOSTON, MA, 02116
Location
- Address
- 100 SUMMER ST
- City
- Boston
- ZIP
- 02110
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 100 SUMMER ST compare with other Boston office buildings?
At 1,344,121 sq ft, 100 SUMMER ST is about 20 times the size of the average office building on the Boston roll, which comes to 67,328 sq ft across 1,046 buildings.
With 32 floors it is one of 125 office buildings of ten or more floors in the metro.
Its assessed value works out to $415 per square foot of building area, against $469 across all office floor area on the roll.
The last recorded sale priced it at $600 per square foot.
What has happened at 100 SUMMER ST recently?
1 recorded transfer is on file for this parcel, the latest dated Oct 2019.
The building files energy-benchmarking disclosures — 1 report year are matched to this parcel.
What does “Office” mean for this parcel?
The Boston roll classifies parcel ID 0304220000 as “Office” (use code 348). 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 100 SUMMER ST?
The recorded owner on the Boston assessment roll (current) is 100 SUMMER OWNER LLC. Owner mailing address on file: 500 BOYLSTON ST SUITE 2100, BOSTON, MA, 02116.
How big is 100 SUMMER ST?
The Boston roll records 1,344,121 sq ft of building area, 32 floors, a build year of 1980. It sits on a 1 sq ft lot.
What is the assessed value of 100 SUMMER ST?
$557,542,600 on the Boston roll. Assessed values are taxable-roll figures, not market prices.
When did 100 SUMMER ST last sell?
The last recorded transfer was in Oct 2019 for $806,000,000 ($600 per square foot).
What is the parcel ID for 100 SUMMER ST?
Parcel ID 0304220000, site address 100 SUMMER ST, Boston. It is the key to look the parcel up in the MassGIS L3 standardized parcels with the city assessment roll (Boston).
More around 100 SUMMER ST
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.
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Dataset updated . Source: Boston assessment roll, parcel ID 0304220000.
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, “100 SUMMER ST, Boston, MA (parcel ID 0304220000)”, https://buildingcensus.com/offices/boston/office-building-b161c485 (data as of September 20, 2026).