At a glance
125 South Street is a 1,560-square-foot office building in Boston, Massachusetts. In its 2023 Boston benchmarking disclosure it reported an ENERGY STAR score of 34 out of 100 (grade D), a site energy-use intensity of 133.6 kBtu/ft² and 11 tCO₂e of greenhouse-gas emissions. That score is higher than 8% of the 356 scored office buildings in Boston.
BERDO 2.0 · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 34 (band D) |
| Site EUI | 133.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 11 tCO₂e |
| GHG intensity | — |
| Electricity | 6,407 kWh |
| Natural gas | 1,866 therms |
| Gross floor area | 1,560 sq ft |
| Source record | boston:107899:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 34 | -27 | 133.6 kBtu/ft² | 11 tCO₂e |
| 2022 | 61 | 88.3 kBtu/ft² | 8 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
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 125 South Street
- City
- Boston
- State
- Massachusetts
- ZIP
- 2130
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 125 South Street compare with other office buildings in Boston?
The latest disclosures cover 467 office buildings in Boston, out of 6,305 buildings citywide. 125 South Street's ENERGY STAR score of 34 compares with an average of 71 across the 356 that report a score; it scores higher than 8% of them and lower than 92%. Its site EUI of 133.6 kBtu/ft² is about twice the average of 61.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 1,560 sq ft, it is about 99% 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 125 South Street's energy performance changed over time?
BuildingCensus holds 2 Boston disclosures for 125 South Street, covering report years 2022–2023. Its ENERGY STAR score went from 61 in 2022 to 34 in 2023 (-27 points); its best year on file was 2022, at 61. Site EUI moved from 88.3 kBtu/ft² (2022) to 133.6 kBtu/ft² (2023), an 51% increase. Reported emissions went from 8 tCO₂e to 11 tCO₂e over the same span (up 42%).
What does an ENERGY STAR score of 34 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 34 means the building performs better than about 34% of its national peers. BuildingCensus bands the score into report-card grades; 34 falls in band D — lowest band (1–54). It sits 41 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. 125 South Street's 133.6 kBtu/ft² across 1,560 sq ft works out to about 0.2 billion Btu (61 MWh-equivalent) in 2023. The disclosure also reports 6,407 kWh of electricity and 1,866 therms of natural gas for the year.
Which law requires 125 South Street to report its energy use?
125 South 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:107899:2023). 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
- 15 Dr. Mary Moore Beatty Cir· 1,540 sq ft · score 33 (D)
- 5-Ranger Office· 1,351 sq ft · score 1 (D)
- Moon Island Training Campus_#6 Two Story Building· 1,264 sq ft · EUI 30.6 kBtu/ft²
- 101 Davison St· 1,225 sq ft · score 14 (D)
- 29 Pond St· 1,170 sq ft · score 30 (D)
- Office building #107209· 836 sq ft · EUI 67.8 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 125 South Street's energy grade?
125 South Street scores 34 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 125 South Street use?
Its 2023 site energy-use intensity was 133.6 kBtu/ft² across 1,560 sq ft, including 6,407 kWh of electricity and 1,866 therms of natural gas.
What are 125 South Street's carbon emissions?
125 South Street reported 11 tCO₂e of greenhouse-gas emissions for 2023.
Where is 125 South Street?
125 South Street is in Boston, Massachusetts 2130.
How big is 125 South Street and when was it built?
125 South Street has 1,560 sq ft of gross floor area, as reported in its 2023 disclosure. It is classed as office.
Is 125 South 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, “125 South Street, Boston, Massachusetts — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/125-south-street-9fc73786 (data as of July 9, 2026).