At a glance
645 Summer St is a 150,000-square-foot office building in Boston, Massachusetts. It is listed in the 2024 Building Emissions Reduction and Disclosure Ordinance disclosure without energy figures: no ENERGY STAR score, energy use or emissions were published for it that year. Its most recent reported figures are from 2022, when it scored 5 out of 100 on ENERGY STAR with a site EUI of 215.9 kBtu/ft².
No energy data reported for 2024
645 Summer St appears in the 2024 Building Emissions Reduction and Disclosure Ordinance disclosure, but no ENERGY STAR score, energy use or emissions were published for it — the building did not report benchmarking data for that year. Earlier reported years are in the table below.
Floor area on file: 150,000 sq ft
Source record boston:104246:2024
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | — | — | |
| 2023 | — | — | — | |
| 2022 | 5 | 215.9 kBtu/ft² | 2,077 tCO₂e |
Compliance context
BERDO 2.0
BERDO 2.0 sets emissions standards for buildings of 20,000+ sq ft or 15+ units, starting in 2025 or 2030 depending on building size, with an alternative-compliance payment of $234 per metric ton of CO₂e over the limit.
Ownership
MASSACHUSETTS PORT AUTHORITY
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Location
- Address
- 645 Summer St
- City
- Boston
- State
- Massachusetts
- ZIP
- 2127.
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in Boston · biggest emitters
How has 645 Summer St's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 645 Summer St, covering report years 2022–2024. Only one of those years carries energy figures.
Which law requires 645 Summer St to report its energy use?
645 Summer St reports under BERDO 2.0, the legal basis of Boston's Building Emissions Reduction and Disclosure Ordinance, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record boston:104246:2024). BERDO 2.0 sets emissions standards for buildings of 20,000+ sq ft or 15+ units, starting in 2025 or 2030 depending on building size, with an alternative-compliance payment of $234 per metric ton of CO₂e over the limit.
More office buildings in Boston
- 372-378 Stuart St· 149,420 sq ft · EUI 23.6 kBtu/ft²
- 750 Harrison Ave· 143,324 sq ft · EUI 134.7 kBtu/ft²
- 533 Commonwealth Ave· 140,700 sq ft
- 26 Court St· 139,821 sq ft · score 100 (A)
- 286-290 Summer St· 138,350 sq ft · score 84 (B)
- 24 School St· 134,789 sq ft · score 82 (B)
- Office buildings in Boston· 467 benchmarked
- All Boston benchmarked buildings· BERDO 2.0
- Most efficient large buildings in Boston
- Least efficient large buildings in Boston
- Biggest emitters in Boston
Frequently asked questions
What is 645 Summer St's energy grade?
645 Summer St has no grade: it did not report energy data for 2024. The 2024 Building Emissions Reduction and Disclosure Ordinance disclosure lists the building but publishes no ENERGY STAR score, energy use or emissions for it.
Where is 645 Summer St?
645 Summer St is in Boston, Massachusetts 2127.
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About this data
Source: Building Emissions Reduction and Disclosure Ordinance (BERDO 2.0), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “645 Summer St, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/645-summer-st-ea2f3b42 (data as of July 9, 2026).