459-461 Walnut Ave
Multifamily Housing in Boston, MA · 2130.
At a glance
459-461 Walnut Ave is a 30,120-square-foot multifamily housing building in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported a site energy-use intensity of 49.8 kBtu/ft² and 83 tCO₂e of greenhouse-gas emissions.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 49.8 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 83 tCO₂e |
| GHG intensity | — |
| Electricity | 275,575 kWh |
| Natural gas | 5,590 therms |
| Gross floor area | 30,120 sq ft |
| Source record | boston:106614:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 49.8 kBtu/ft² | 83 tCO₂e | |
| 2023 | — | 57.7 kBtu/ft² | 99 tCO₂e | |
| 2022 | — | 54.3 kBtu/ft² | 97 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
WALNUT AVENUE APARTMENTS
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Location
- Address
- 459-461 Walnut Ave
- 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 459-461 Walnut Ave 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 49.8 kBtu/ft² is about 26% below the average of 67.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 30,120 sq ft, it is about half of 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 459-461 Walnut Ave's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 459-461 Walnut Ave, covering report years 2022–2024. Site EUI moved from 54.3 kBtu/ft² (2022) to 49.8 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 97 tCO₂e to 83 tCO₂e over the same span (down 14%).
What does a site EUI of 49.8 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. 459-461 Walnut Ave's 49.8 kBtu/ft² across 30,120 sq ft works out to about 1.5 billion Btu (440 MWh-equivalent) in 2024. The disclosure also reports 275,575 kWh of electricity and 5,590 therms of natural gas for the year.
Which law requires 459-461 Walnut Ave to report its energy use?
459-461 Walnut Ave 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:106614:2024). 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
- 225 Sumner St· 30,096 sq ft · score 28 (D)
- 178-180 Columbia Rd· 30,060 sq ft · score 67 (C)
- 1615 Commonwealth Ave· 30,054 sq ft · score 95 (A)
- Multifamily Housing building #103398· 30,053 sq ft · score 7 (D)
- 7-19 Mount Hood Rd· 30,000 sq ft
- 293-295 Commonwealth Ave· 30,000 sq ft · score 64 (C)
- 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 459-461 Walnut Ave's energy grade?
459-461 Walnut Ave did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 49.8 kBtu/ft².
How much energy does 459-461 Walnut Ave use?
Its 2024 site energy-use intensity was 49.8 kBtu/ft² across 30,120 sq ft, including 275,575 kWh of electricity and 5,590 therms of natural gas.
What are 459-461 Walnut Ave's carbon emissions?
459-461 Walnut Ave reported 83 tCO₂e of greenhouse-gas emissions for 2024.
Where is 459-461 Walnut Ave?
459-461 Walnut Ave is in Boston, Massachusetts 2130.
How big is 459-461 Walnut Ave and when was it built?
459-461 Walnut Ave has 30,120 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as multifamily housing.
Is 459-461 Walnut Ave 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, “459-461 Walnut Ave, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/459-461-walnut-ave-3bd889fa (data as of July 9, 2026).