251-261 Monsignor Dennis F. O'Callaghan Way
Multifamily Housing in Boston, MA · 2127.
At a glance
251-261 Monsignor Dennis F. O'Callaghan Way is a 8,538-square-foot multifamily housing building in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported a site energy-use intensity of 130.2 kBtu/ft² and 60 tCO₂e of greenhouse-gas emissions.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 130.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 60 tCO₂e |
| GHG intensity | — |
| Electricity | 70,807 kWh |
| Natural gas | 8,697 therms |
| Gross floor area | 8,538 sq ft |
| Source record | boston:100915:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 130.2 kBtu/ft² | 60 tCO₂e | |
| 2023 | — | 96.7 kBtu/ft² | 87 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
BOSTON HOUSING AUTHORITY
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Location
- Address
- 251-261 Monsignor Dennis F. O'Callaghan Way
- City
- Boston
- State
- Massachusetts
- ZIP
- 2127.
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 251-261 Monsignor Dennis F. O'Callaghan Way compare with other multifamily housing buildings in Boston?
The latest disclosures cover 2,174 multifamily housing buildings in Boston, out of 6,305 buildings citywide. Its site EUI of 130.2 kBtu/ft² is about twice the average of 67.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 8,538 sq ft, it is about 85% below the average floor area of 58,087 sq ft for those buildings. Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has 251-261 Monsignor Dennis F. O'Callaghan Way's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 251-261 Monsignor Dennis F. O'Callaghan Way, covering report years 2022–2024. Site EUI moved from 96.7 kBtu/ft² (2023) to 130.2 kBtu/ft² (2024), an 35% increase. Reported emissions went from 87 tCO₂e to 60 tCO₂e over the same span (down 31%).
What does a site EUI of 130.2 kBtu/ft² mean?
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. 251-261 Monsignor Dennis F. O'Callaghan Way's 130.2 kBtu/ft² across 8,538 sq ft works out to about 1.1 billion Btu (326 MWh-equivalent) in 2024. The disclosure also reports 70,807 kWh of electricity and 8,697 therms of natural gas for the year.
Which law requires 251-261 Monsignor Dennis F. O'Callaghan Way to report its energy use?
251-261 Monsignor Dennis F. O'Callaghan 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:100915:2024). 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 multifamily housing buildings in Boston
- 274-280 Main St· 8,519 sq ft
- 53-75 General Lawrence J Logan Way· 8,510 sq ft · EUI 130.2 kBtu/ft²
- 22 Border St· 8,473 sq ft · EUI 8.7 kBtu/ft²
- 100-100A Lanark Rd· 8,464 sq ft · EUI 16.4 kBtu/ft²
- 18 Marginal St· 8,400 sq ft · EUI 87.5 kBtu/ft²
- 2-10 S Bremen St· 8,400 sq ft · EUI 87.5 kBtu/ft²
- Multifamily Housing buildings in Boston· 2,174 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 251-261 Monsignor Dennis F. O'Callaghan Way's energy grade?
251-261 Monsignor Dennis F. O'Callaghan Way did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 130.2 kBtu/ft².
How much energy does 251-261 Monsignor Dennis F. O'Callaghan Way use?
Its 2024 site energy-use intensity was 130.2 kBtu/ft² across 8,538 sq ft, including 70,807 kWh of electricity and 8,697 therms of natural gas.
What are 251-261 Monsignor Dennis F. O'Callaghan Way's carbon emissions?
251-261 Monsignor Dennis F. O'Callaghan Way reported 60 tCO₂e of greenhouse-gas emissions for 2024.
Where is 251-261 Monsignor Dennis F. O'Callaghan Way?
251-261 Monsignor Dennis F. O'Callaghan Way is in Boston, Massachusetts 2127.
How big is 251-261 Monsignor Dennis F. O'Callaghan Way and when was it built?
251-261 Monsignor Dennis F. O'Callaghan Way has 8,538 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as multifamily housing.
Is 251-261 Monsignor Dennis F. O'Callaghan 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, “251-261 Monsignor Dennis F. O'Callaghan Way, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/251-261-monsignor-dennis-f-o-callaghan-way-1607b029 (data as of July 9, 2026).