At a glance
209 Sumner Street is a 6,500-square-foot office building in Boston, Massachusetts. In its 2023 Boston benchmarking disclosure it reported an ENERGY STAR score of 41 out of 100 (grade D), a site energy-use intensity of 85.6 kBtu/ft² and 31 tCO₂e of greenhouse-gas emissions. That score is higher than 11% of the 356 scored office buildings in Boston.
BERDO 2.0 · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 41 (band D) |
| Site EUI | 85.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 31 tCO₂e |
| GHG intensity | — |
| Electricity | 70,542 kWh |
| Natural gas | 3,159 therms |
| Gross floor area | 6,500 sq ft |
| Source record | boston:107930:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 41 | 85.6 kBtu/ft² | 31 tCO₂e | |
| 2022 | — | — | — |
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
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 209 Sumner Street
- City
- Boston
- State
- Massachusetts
- ZIP
- 2129
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 does 209 Sumner Street compare with other office buildings in Boston?
The latest disclosures cover 467 office buildings in Boston, out of 6,305 buildings citywide. 209 Sumner Street's ENERGY STAR score of 41 compares with an average of 71 across the 356 that report a score; it scores higher than 11% of them and lower than 88%. Its site EUI of 85.6 kBtu/ft² is about 39% above the average of 61.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 6,500 sq ft, it is about 97% below the average floor area of 191,803 sq ft for those buildings. Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 209 Sumner Street's energy performance changed over time?
BuildingCensus holds 2 Boston disclosures for 209 Sumner Street, covering report years 2022–2023. Only one of those years carries energy figures.
What does an ENERGY STAR score of 41 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 41 means the building performs better than about 41% of its national peers. BuildingCensus bands the score into report-card grades; 41 falls in band D — lowest band (1–54). It sits 34 points below 75, the threshold for ENERGY STAR certification. In Boston, 52% of scored buildings are at 75 or above.
Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. 209 Sumner Street's 85.6 kBtu/ft² across 6,500 sq ft works out to about 0.6 billion Btu (163 MWh-equivalent) in 2023. The disclosure also reports 70,542 kWh of electricity and 3,159 therms of natural gas for the year.
Which law requires 209 Sumner Street to report its energy use?
209 Sumner Street 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 2023 disclosure (source record boston:107930:2023). 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
- Office building #107202· 5,090 sq ft · EUI 69.8 kBtu/ft²
- 81 Orton-Marotta Way· 4,725 sq ft · score 56 (C)
- Fairview Av· 4,600 sq ft · score 84 (B)
- 10 Kemp Street (Rear)· 4,500 sq ft · score 26 (D)
- Office building #107201· 4,314 sq ft · EUI 48.0 kBtu/ft²
- 98 Moon Island Road· 4,116 sq ft · EUI 106.7 kBtu/ft²
- 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 209 Sumner Street's energy grade?
209 Sumner Street scores 41 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 Boston disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 209 Sumner Street use?
Its 2023 site energy-use intensity was 85.6 kBtu/ft² across 6,500 sq ft, including 70,542 kWh of electricity and 3,159 therms of natural gas.
What are 209 Sumner Street's carbon emissions?
209 Sumner Street reported 31 tCO₂e of greenhouse-gas emissions for 2023.
Where is 209 Sumner Street?
209 Sumner Street is in Boston, Massachusetts 2129.
How big is 209 Sumner Street and when was it built?
209 Sumner Street has 6,500 sq ft of gross floor area, as reported in its 2023 disclosure. It is classed as office.
Is 209 Sumner Street covered by BERDO 2.0?
Yes — it appears in the 2023 Building Emissions Reduction and Disclosure Ordinance disclosure, which lists the buildings reporting under BERDO 2.0.
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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, “209 Sumner Street, Boston, Massachusetts — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/209-sumner-street-a4d19dc8 (data as of July 9, 2026).