50 Lewis St
Multifamily Housing in Boston, MA · 2113.
At a glance
50 Lewis St is a 11,155-square-foot multifamily housing building in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported a site energy-use intensity of 48.9 kBtu/ft² and 29 tCO₂e of greenhouse-gas emissions.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 48.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 29 tCO₂e |
| GHG intensity | — |
| Electricity | 34,220 kWh |
| Natural gas | 4,287 therms |
| Gross floor area | 11,155 sq ft |
| Source record | boston:107819:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 48.9 kBtu/ft² | 29 tCO₂e | |
| 2023 | — | 48.5 kBtu/ft² | 30 tCO₂e | |
| 2022 | — | 50.0 kBtu/ft² | 32 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
FORTY6 LEWIS ST CO-OP CORP
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Location
- Address
- 50 Lewis St
- City
- Boston
- State
- Massachusetts
- ZIP
- 2113.
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 50 Lewis 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. Its site EUI of 48.9 kBtu/ft² is about 28% below the average of 67.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 11,155 sq ft, it is about 81% 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 50 Lewis St's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 50 Lewis St, covering report years 2022–2024. Site EUI moved from 50.0 kBtu/ft² (2022) to 48.9 kBtu/ft² (2024), a 2% decrease. Reported emissions went from 32 tCO₂e to 29 tCO₂e over the same span (down 9%).
What does a site EUI of 48.9 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. 50 Lewis St's 48.9 kBtu/ft² across 11,155 sq ft works out to about 0.5 billion Btu (160 MWh-equivalent) in 2024. The disclosure also reports 34,220 kWh of electricity and 4,287 therms of natural gas for the year.
Which law requires 50 Lewis St to report its energy use?
50 Lewis 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:107819:2024). 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
- 55-69 Vallar Rd· 11,118 sq ft · EUI 51.9 kBtu/ft²
- 1-5 Metcalf Ct· 11,088 sq ft · EUI 104.4 kBtu/ft²
- 9-11 Metcalf Ct· 11,088 sq ft · EUI 104.4 kBtu/ft²
- 10-12 Metcalf Ct· 11,088 sq ft · EUI 104.4 kBtu/ft²
- 21-23 Saint Rose St· 11,088 sq ft · EUI 104.4 kBtu/ft²
- 31-35 Saint Rose St· 11,088 sq ft · EUI 104.4 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 50 Lewis St's energy grade?
50 Lewis St did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 48.9 kBtu/ft².
How much energy does 50 Lewis St use?
Its 2024 site energy-use intensity was 48.9 kBtu/ft² across 11,155 sq ft, including 34,220 kWh of electricity and 4,287 therms of natural gas.
What are 50 Lewis St's carbon emissions?
50 Lewis St reported 29 tCO₂e of greenhouse-gas emissions for 2024.
Where is 50 Lewis St?
50 Lewis St is in Boston, Massachusetts 2113.
How big is 50 Lewis St and when was it built?
50 Lewis St has 11,155 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as multifamily housing.
Is 50 Lewis 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, “50 Lewis St, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/50-lewis-st-a57ed8ed (data as of July 9, 2026).