At a glance
42 Horan Way is a 4,087-square-foot office building in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported an ENERGY STAR score of 32 out of 100 (grade D), a site energy-use intensity of 102.0 kBtu/ft² and 23 tCO₂e of greenhouse-gas emissions. That score is higher than 6% of the 356 scored office buildings in Boston.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 32 (band D) |
| Site EUI | 102.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 23 tCO₂e |
| GHG intensity | — |
| Electricity | 44,074 kWh |
| Natural gas | 2,665 therms |
| Gross floor area | 4,087 sq ft |
| Source record | boston:101961:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 32 | 102.0 kBtu/ft² | 23 tCO₂e | |
| 2023 | — | 128.5 kBtu/ft² | 29 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
CITY OF BOSTON
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Location
- Address
- 42 Horan Way
- 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 42 Horan Way compare with other office buildings in Boston?
The latest disclosures cover 467 office buildings in Boston, out of 6,305 buildings citywide. 42 Horan Way's ENERGY STAR score of 32 compares with an average of 71 across the 356 that report a score; it scores higher than 6% of them and lower than 93%. Its site EUI of 102.0 kBtu/ft² is about 65% above the average of 61.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 4,087 sq ft, it is about 98% 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 42 Horan Way's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 42 Horan Way, covering report years 2022–2024. Site EUI moved from 128.5 kBtu/ft² (2023) to 102.0 kBtu/ft² (2024), a 21% decrease. Reported emissions went from 29 tCO₂e to 23 tCO₂e over the same span (down 21%).
What does an ENERGY STAR score of 32 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 32 means the building performs better than about 32% of its national peers. BuildingCensus bands the score into report-card grades; 32 falls in band D — lowest band (1–54). It sits 43 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. 42 Horan Way's 102.0 kBtu/ft² across 4,087 sq ft works out to about 0.4 billion Btu (122 MWh-equivalent) in 2024. The disclosure also reports 44,074 kWh of electricity and 2,665 therms of natural gas for the year.
Which law requires 42 Horan Way to report its energy use?
42 Horan Way 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:101961:2024). 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
- 43 Bow St· 4,000 sq ft · score 65 (C)
- White Stadium_Office· 4,000 sq ft
- Bispham St Pwd-District 7 Yard_Office Bldg· 3,313 sq ft · score 59 (C)
- Community Bldg· 3,200 sq ft · score 66 (C)
- 68 Annunciation Road· 3,100 sq ft · score 65 (C)
- 115 Standard St· 3,000 sq ft · score 59 (C)
- 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 42 Horan Way's energy grade?
42 Horan Way scores 32 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 42 Horan Way use?
Its 2024 site energy-use intensity was 102.0 kBtu/ft² across 4,087 sq ft, including 44,074 kWh of electricity and 2,665 therms of natural gas.
What are 42 Horan Way's carbon emissions?
42 Horan Way reported 23 tCO₂e of greenhouse-gas emissions for 2024.
Where is 42 Horan Way?
42 Horan Way is in Boston, Massachusetts 2130.
How big is 42 Horan Way and when was it built?
42 Horan Way has 4,087 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as office.
Is 42 Horan Way 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, “42 Horan Way, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/42-horan-way-e9611a30 (data as of July 9, 2026).