20 Washington St
Multifamily Housing in Boston, MA · 2135.
At a glance
20 Washington St is a 191,105-square-foot multifamily housing building in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported an ENERGY STAR score of 66 out of 100 (grade C), a site energy-use intensity of 57.5 kBtu/ft² and 598 tCO₂e of greenhouse-gas emissions. That score is higher than 34% of the 1,225 scored multifamily housing buildings in Boston.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 66 (band C) |
| Site EUI | 57.5 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 598 tCO₂e |
| GHG intensity | — |
| Electricity | 1,070,360 kWh |
| Natural gas | 73,362 therms |
| Gross floor area | 191,105 sq ft |
| Source record | boston:101178:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 66 | +5 | 57.5 kBtu/ft² | 598 tCO₂e |
| 2023 | 61 | 57.3 kBtu/ft² | 609 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
- 20 Washington St
- City
- Boston
- State
- Massachusetts
- ZIP
- 2135.
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 20 Washington St 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. 20 Washington St's ENERGY STAR score of 66 compares with an average of 71 across the 1,225 that report a score; it scores higher than 34% of them and lower than 66%. Its site EUI of 57.5 kBtu/ft² is about 15% below the average of 67.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 191,105 sq ft, it is about 229% above 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 20 Washington St's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 20 Washington St, covering report years 2022–2024. Its ENERGY STAR score went from 61 in 2023 to 66 in 2024 (+5 points). Site EUI moved from 57.3 kBtu/ft² (2023) to 57.5 kBtu/ft² (2024), an 0% increase. Reported emissions went from 609 tCO₂e to 598 tCO₂e over the same span (down 2%).
What does an ENERGY STAR score of 66 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 66 means the building performs better than about 66% of its national peers. BuildingCensus bands the score into report-card grades; 66 falls in band C — below median (55–69). It sits 9 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. 20 Washington St's 57.5 kBtu/ft² across 191,105 sq ft works out to about 11 billion Btu (3,220 MWh-equivalent) in 2024. The disclosure also reports 1,070,360 kWh of electricity and 73,362 therms of natural gas for the year.
Which law requires 20 Washington St to report its energy use?
20 Washington 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:101178:2024). 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
- 1346-1352 Boylston St· 189,800 sq ft · score 57 (C)
- 1344 Hyde Park Ave· 187,533 sq ft · score 96 (A)
- 140 Clarendon St· 186,955 sq ft · score 4 (D)
- 300-322 Commercial St· 186,285 sq ft · score 77 (B)
- Multifamily Housing building #100446· 186,139 sq ft · score 95 (A)
- Multifamily Housing building #C10084· 184,172 sq ft · EUI 41.2 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 20 Washington St's energy grade?
20 Washington St scores 66 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 Boston disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 20 Washington St use?
Its 2024 site energy-use intensity was 57.5 kBtu/ft² across 191,105 sq ft, including 1,070,360 kWh of electricity and 73,362 therms of natural gas.
What are 20 Washington St's carbon emissions?
20 Washington St reported 598 tCO₂e of greenhouse-gas emissions for 2024.
Where is 20 Washington St?
20 Washington St is in Boston, Massachusetts 2135.
How big is 20 Washington St and when was it built?
20 Washington St has 191,105 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as multifamily housing.
Is 20 Washington 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, “20 Washington St, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/20-washington-st-eb26ccbb (data as of July 9, 2026).