33-35 Mildred Av
K-12 School in Boston, MA · 2126.
At a glance
33-35 Mildred Av is a 172,000-square-foot K-12 school in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported an ENERGY STAR score of 42 out of 100 (grade D), a site energy-use intensity of 67.8 kBtu/ft² and 641 tCO₂e of greenhouse-gas emissions. That score is higher than 23% of the 163 scored K-12 school buildings in Boston.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 42 (band D) |
| Site EUI | 67.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 641 tCO₂e |
| GHG intensity | — |
| Electricity | 1,619,553 kWh |
| Natural gas | 61,330 therms |
| Gross floor area | 172,000 sq ft |
| Source record | boston:106926:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 42 | +15 | 67.8 kBtu/ft² | 641 tCO₂e |
| 2023 | 27 | +1 | 78.0 kBtu/ft² | 756 tCO₂e |
| 2022 | 26 | 87.0 kBtu/ft² | 956 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
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 33-35 Mildred Av
- City
- Boston
- State
- Massachusetts
- ZIP
- 2126.
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 33-35 Mildred Av 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. 33-35 Mildred Av's ENERGY STAR score of 42 compares with an average of 59 across the 163 that report a score; it scores higher than 23% of them and lower than 74%. Its site EUI of 67.8 kBtu/ft² is roughly in line with the average of 64.5 kBtu/ft².
At 172,000 sq ft, it is about twice 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 33-35 Mildred Av's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 33-35 Mildred Av, covering report years 2022–2024. Its ENERGY STAR score went from 26 in 2022 to 42 in 2024 (+16 points). Site EUI moved from 87.0 kBtu/ft² (2022) to 67.8 kBtu/ft² (2024), a 22% decrease. Reported emissions went from 956 tCO₂e to 641 tCO₂e over the same span (down 33%).
What does an ENERGY STAR score of 42 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 42 means the building performs better than about 42% of its national peers. BuildingCensus bands the score into report-card grades; 42 falls in band D — lowest band (1–54). It sits 33 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. 33-35 Mildred Av's 67.8 kBtu/ft² across 172,000 sq ft works out to about 11.7 billion Btu (3,418 MWh-equivalent) in 2024. The disclosure also reports 1,619,553 kWh of electricity and 61,330 therms of natural gas for the year.
Which law requires 33-35 Mildred Av to report its energy use?
33-35 Mildred Av 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:106926:2024). 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
- 100 Hebron St· 171,025 sq ft · score 56 (C)
- 174 Ipswich St· 165,857 sq ft · score 42 (D)
- 95 G St· 159,320 sq ft · score 59 (C)
- 312 Border St· 158,706 sq ft · EUI 124.2 kBtu/ft²
- 155 Talbot Ave· 153,460 sq ft · score 68 (C)
- 9 Peacevale Rd· 153,460 sq ft · score 70 (B)
- 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 33-35 Mildred Av's energy grade?
33-35 Mildred Av scores 42 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 Boston disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 33-35 Mildred Av use?
Its 2024 site energy-use intensity was 67.8 kBtu/ft² across 172,000 sq ft, including 1,619,553 kWh of electricity and 61,330 therms of natural gas.
What are 33-35 Mildred Av's carbon emissions?
33-35 Mildred Av reported 641 tCO₂e of greenhouse-gas emissions for 2024.
Where is 33-35 Mildred Av?
33-35 Mildred Av is in Boston, Massachusetts 2126.
How big is 33-35 Mildred Av and when was it built?
33-35 Mildred Av has 172,000 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as K-12 school.
Is 33-35 Mildred Av 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.
Working with Boston building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “33-35 Mildred Av, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/33-35-mildred-av-3d82d654 (data as of July 9, 2026).