35 South St
Multifamily Housing in Boston, MA · 2135.
At a glance
35 South St is a 33,548-square-foot multifamily housing building in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported an ENERGY STAR score of 68 out of 100 (grade C), a site energy-use intensity of 78.1 kBtu/ft² and 141 tCO₂e of greenhouse-gas emissions. That score is higher than 35% of the 1,225 scored multifamily housing buildings in Boston.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 68 (band C) |
| Site EUI | 78.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 141 tCO₂e |
| GHG intensity | — |
| Electricity | 150,688 kWh |
| Natural gas | 21,062 therms |
| Gross floor area | 33,548 sq ft |
| Source record | boston:107337:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 68 | -17 | 78.1 kBtu/ft² | 141 tCO₂e |
| 2023 | 85 | 63.6 kBtu/ft² | 117 tCO₂e | |
| 2022 | — | 52.3 kBtu/ft² | 52 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
5516 SOUTH STREET 31-35 BOSTON LLC
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Location
- Address
- 35 South 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 35 South 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. 35 South St's ENERGY STAR score of 68 compares with an average of 71 across the 1,225 that report a score; it scores higher than 35% of them and lower than 64%. Its site EUI of 78.1 kBtu/ft² is about 15% above the average of 67.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 33,548 sq ft, it is about 42% 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 35 South St's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 35 South St, covering report years 2022–2024. Its ENERGY STAR score went from 85 in 2023 to 68 in 2024 (-17 points); its best year on file was 2023, at 85. Site EUI moved from 52.3 kBtu/ft² (2022) to 78.1 kBtu/ft² (2024), an 49% increase. Reported emissions went from 52 tCO₂e to 141 tCO₂e over the same span (up 172%).
What does an ENERGY STAR score of 68 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 68 means the building performs better than about 68% of its national peers. BuildingCensus bands the score into report-card grades; 68 falls in band C — below median (55–69). It sits 7 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. 35 South St's 78.1 kBtu/ft² across 33,548 sq ft works out to about 2.6 billion Btu (768 MWh-equivalent) in 2024. The disclosure also reports 150,688 kWh of electricity and 21,062 therms of natural gas for the year.
Which law requires 35 South St to report its energy use?
35 South 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:107337:2024). 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
- 1134-1140 Washington St· 33,538 sq ft · EUI 37.4 kBtu/ft²
- 63-69 Endicott St· 33,538 sq ft · score 9 (D)
- 290-296 Hanover St· 33,522 sq ft · EUI 61.9 kBtu/ft²
- 3316-3324 Washington St· 33,504 sq ft · EUI 67.1 kBtu/ft²
- 422 River St· 33,493 sq ft · score 98 (A)
- 29-33 Brainerd Rd· 33,387 sq ft · score 89 (A)
- 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 35 South St's energy grade?
35 South St scores 68 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 35 South St use?
Its 2024 site energy-use intensity was 78.1 kBtu/ft² across 33,548 sq ft, including 150,688 kWh of electricity and 21,062 therms of natural gas.
What are 35 South St's carbon emissions?
35 South St reported 141 tCO₂e of greenhouse-gas emissions for 2024.
Where is 35 South St?
35 South St is in Boston, Massachusetts 2135.
How big is 35 South St and when was it built?
35 South St has 33,548 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as multifamily housing.
Is 35 South 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, “35 South St, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/35-south-st-71f060b5 (data as of July 9, 2026).