At a glance
91 Ames St is a 2,301-square-foot office building in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported an ENERGY STAR score of 60 out of 100 (grade C), a site energy-use intensity of 73.6 kBtu/ft² and 9 tCO₂e of greenhouse-gas emissions. That score is higher than 25% of the 356 scored office buildings in Boston.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 60 (band C) |
| Site EUI | 73.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 9 tCO₂e |
| GHG intensity | — |
| Electricity | 15,683 kWh |
| Natural gas | 1,158 therms |
| Gross floor area | 2,301 sq ft |
| Source record | boston:102059:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 60 | -22 | 73.6 kBtu/ft² | 9 tCO₂e |
| 2023 | 82 | -13 | 52.7 kBtu/ft² | 7 tCO₂e |
| 2022 | 95 | 47.6 kBtu/ft² | 6 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
CITY OF BOSTON
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Location
- Address
- 91 Ames St
- City
- Boston
- State
- Massachusetts
- ZIP
- 2124.
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 91 Ames St compare with other office buildings in Boston?
The latest disclosures cover 467 office buildings in Boston, out of 6,305 buildings citywide. 91 Ames St's ENERGY STAR score of 60 compares with an average of 71 across the 356 that report a score; it scores higher than 25% of them and lower than 74%. Its site EUI of 73.6 kBtu/ft² is about 19% above the average of 61.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 2,301 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 91 Ames St's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 91 Ames St, covering report years 2022–2024. Its ENERGY STAR score went from 95 in 2022 to 60 in 2024 (-35 points); its best year on file was 2022, at 95. Site EUI moved from 47.6 kBtu/ft² (2022) to 73.6 kBtu/ft² (2024), an 55% increase. Reported emissions went from 6 tCO₂e to 9 tCO₂e over the same span (up 57%).
What does an ENERGY STAR score of 60 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 60 means the building performs better than about 60% of its national peers. BuildingCensus bands the score into report-card grades; 60 falls in band C — below median (55–69). It sits 15 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. 91 Ames St's 73.6 kBtu/ft² across 2,301 sq ft works out to about 0.2 billion Btu (50 MWh-equivalent) in 2024. The disclosure also reports 15,683 kWh of electricity and 1,158 therms of natural gas for the year.
Which law requires 91 Ames St to report its energy use?
91 Ames 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:102059:2024). 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
- 345 Old Colony Ave· 2,025 sq ft · score 26 (D)
- 2060 Commonwealth Av· 2,000 sq ft · score 76 (B)
- 125 South Street· 1,560 sq ft · score 34 (D)
- 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
- 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 91 Ames St's energy grade?
91 Ames St scores 60 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 Boston disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 91 Ames St use?
Its 2024 site energy-use intensity was 73.6 kBtu/ft² across 2,301 sq ft, including 15,683 kWh of electricity and 1,158 therms of natural gas.
What are 91 Ames St's carbon emissions?
91 Ames St reported 9 tCO₂e of greenhouse-gas emissions for 2024.
Where is 91 Ames St?
91 Ames St is in Boston, Massachusetts 2124.
How big is 91 Ames St and when was it built?
91 Ames St has 2,301 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as office.
Is 91 Ames St covered by BERDO 2.0?
Yes — it appears in the 2024 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, “91 Ames St, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/91-ames-st-5f68c053 (data as of July 9, 2026).