121-123 Beach St
Multifamily Housing in Boston, MA · 2111.
At a glance
121-123 Beach St is a 48,000-square-foot multifamily housing building in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 31.7 kBtu/ft² and 85 tCO₂e of greenhouse-gas emissions. That score is higher than 68% of the 1,225 scored multifamily housing buildings in Boston.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 91 (band A) |
| Site EUI | 31.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 85 tCO₂e |
| GHG intensity | — |
| Electricity | 284,907 kWh |
| Natural gas | 5,512 therms |
| Gross floor area | 48,000 sq ft |
| Source record | boston:100575:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 91 | -3 | 31.7 kBtu/ft² | 85 tCO₂e |
| 2023 | 94 | 29.6 kBtu/ft² | 82 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
BEACH STREET CONDOMINIUM TR
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Location
- Address
- 121-123 Beach St
- City
- Boston
- State
- Massachusetts
- ZIP
- 2111.
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 121-123 Beach 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. 121-123 Beach St's ENERGY STAR score of 91 compares with an average of 71 across the 1,225 that report a score; it scores higher than 68% of them and lower than 30%. Its site EUI of 31.7 kBtu/ft² is about half of the average of 67.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 48,000 sq ft, it is about 17% 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 121-123 Beach St's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 121-123 Beach St, covering report years 2022–2024. Its ENERGY STAR score went from 94 in 2023 to 91 in 2024 (-3 points); its best year on file was 2023, at 94. Site EUI moved from 29.6 kBtu/ft² (2023) to 31.7 kBtu/ft² (2024), an 7% increase. Reported emissions went from 82 tCO₂e to 85 tCO₂e over the same span (up 3%).
What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. 121-123 Beach St's 31.7 kBtu/ft² across 48,000 sq ft works out to about 1.5 billion Btu (446 MWh-equivalent) in 2024. The disclosure also reports 284,907 kWh of electricity and 5,512 therms of natural gas for the year.
Which law requires 121-123 Beach St to report its energy use?
121-123 Beach 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:100575:2024). 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
- 25 Amory St· 47,876 sq ft · score 95 (A)
- 122A Highland St· 47,740 sq ft · score 66 (C)
- 160 E Berkeley St· 47,706 sq ft · score 46 (D)
- 715-723 Dudley St· 47,624 sq ft · score 85 (A)
- 99-103 Norway St· 47,570 sq ft · score 70 (B)
- 5300 Washington St· 47,460 sq ft · EUI 72.4 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 121-123 Beach St's energy grade?
121-123 Beach St scores 91 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 Boston disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 121-123 Beach St use?
Its 2024 site energy-use intensity was 31.7 kBtu/ft² across 48,000 sq ft, including 284,907 kWh of electricity and 5,512 therms of natural gas.
What are 121-123 Beach St's carbon emissions?
121-123 Beach St reported 85 tCO₂e of greenhouse-gas emissions for 2024.
Where is 121-123 Beach St?
121-123 Beach St is in Boston, Massachusetts 2111.
How big is 121-123 Beach St and when was it built?
121-123 Beach St has 48,000 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as multifamily housing.
Is 121-123 Beach 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, “121-123 Beach St, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/121-123-beach-st-c23a6712 (data as of July 9, 2026).