50 Saint Mary'S St
K-12 School in Boston, MA · 2215.
At a glance
50 Saint Mary'S St is a 17,299-square-foot K-12 school in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported an ENERGY STAR score of 79 out of 100 (grade B), a site energy-use intensity of 56.1 kBtu/ft² and 52 tCO₂e of greenhouse-gas emissions. That score is higher than 76% of the 163 scored K-12 school buildings in Boston.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 79 (band B) |
| Site EUI | 56.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 52 tCO₂e |
| GHG intensity | — |
| Electricity | 38,948 kWh |
| Natural gas | 8,367 therms |
| Gross floor area | 17,299 sq ft |
| Source record | boston:102136:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 79 | +1 | 56.1 kBtu/ft² | 52 tCO₂e |
| 2023 | 78 | +5 | 56.4 kBtu/ft² | 53 tCO₂e |
| 2022 | 73 | 64.0 kBtu/ft² | 63 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
- 50 Saint Mary'S St
- City
- Boston
- State
- Massachusetts
- ZIP
- 2215.
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 50 Saint Mary'S St compare with other K-12 school buildings in Boston?
The latest disclosures cover 175 K-12 school buildings in Boston, out of 6,305 buildings citywide. 50 Saint Mary'S St's ENERGY STAR score of 79 compares with an average of 59 across the 163 that report a score; it scores higher than 76% of them and lower than 22%. Its site EUI of 56.1 kBtu/ft² is about 13% below the average of 64.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 17,299 sq ft, it is about 79% below the average floor area of 83,066 sq ft for those buildings. Across all 24 jurisdictions BuildingCensus covers, the 6,548 K-12 school buildings average an ENERGY STAR score of 64 and a site EUI of 52.7 kBtu/ft².
How has 50 Saint Mary'S St's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 50 Saint Mary'S St, covering report years 2022–2024. Its ENERGY STAR score went from 73 in 2022 to 79 in 2024 (+6 points). Site EUI moved from 64.0 kBtu/ft² (2022) to 56.1 kBtu/ft² (2024), a 12% decrease. Reported emissions went from 63 tCO₂e to 52 tCO₂e over the same span (down 17%).
What does an ENERGY STAR score of 79 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 79 means the building performs better than about 79% of its national peers. BuildingCensus bands the score into report-card grades; 79 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. 50 Saint Mary'S St's 56.1 kBtu/ft² across 17,299 sq ft works out to about 1 billion Btu (284 MWh-equivalent) in 2024. The disclosure also reports 38,948 kWh of electricity and 8,367 therms of natural gas for the year.
Which law requires 50 Saint Mary'S St to report its energy use?
50 Saint Mary'S 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:102136:2024). 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 K-12 school buildings in Boston
- 35-37 Gove St· 16,948 sq ft · score 98 (A)
- 236 Beech St· 16,248 sq ft · score 63 (C)
- 30 Millstone Rd· 14,968 sq ft · score 22 (D)
- 50 Beechcroft St· 13,011 sq ft · score 20 (D)
- K-12 School building #106852· 12,700 sq ft · score 99 (A)
- Dot Hs Annex· 10,287 sq ft · score 9 (D)
- K-12 School buildings in Boston· 175 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 50 Saint Mary'S St's energy grade?
50 Saint Mary'S St scores 79 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 Boston disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 50 Saint Mary'S St use?
Its 2024 site energy-use intensity was 56.1 kBtu/ft² across 17,299 sq ft, including 38,948 kWh of electricity and 8,367 therms of natural gas.
What are 50 Saint Mary'S St's carbon emissions?
50 Saint Mary'S St reported 52 tCO₂e of greenhouse-gas emissions for 2024.
Where is 50 Saint Mary'S St?
50 Saint Mary'S St is in Boston, Massachusetts 2215.
How big is 50 Saint Mary'S St and when was it built?
50 Saint Mary'S St has 17,299 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as K-12 school.
Is 50 Saint Mary'S 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, “50 Saint Mary'S St, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/50-saint-mary-s-st-1534d3b9 (data as of July 9, 2026).