At a glance
426 E First St is a 80,000-square-foot office building in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported a site energy-use intensity of 51.2 kBtu/ft² and 223 tCO₂e of greenhouse-gas emissions.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 51.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 223 tCO₂e |
| GHG intensity | — |
| Electricity | 394,152 kWh |
| Natural gas | 27,505 therms |
| Gross floor area | 80,000 sq ft |
| Source record | boston:104539:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 51.2 kBtu/ft² | 223 tCO₂e | |
| 2023 | — | 52.7 kBtu/ft² | 233 tCO₂e | |
| 2022 | — | 62.4 kBtu/ft² | 303 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
NATCON PROPERTIES INC
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Location
- Address
- 426 E First St
- City
- Boston
- State
- Massachusetts
- ZIP
- 2210.
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 426 E First St compare with other office buildings in Boston?
The latest disclosures cover 467 office buildings in Boston, out of 6,305 buildings citywide. Its site EUI of 51.2 kBtu/ft² is about 17% below the average of 61.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 80,000 sq ft, it is about 58% below the average floor area of 191,803 sq ft for those buildings. Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 426 E First St's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 426 E First St, covering report years 2022–2024. Site EUI moved from 62.4 kBtu/ft² (2022) to 51.2 kBtu/ft² (2024), a 18% decrease. Reported emissions went from 303 tCO₂e to 223 tCO₂e over the same span (down 27%).
What does a site EUI of 51.2 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. 426 E First St's 51.2 kBtu/ft² across 80,000 sq ft works out to about 4.1 billion Btu (1,200 MWh-equivalent) in 2024. The disclosure also reports 394,152 kWh of electricity and 27,505 therms of natural gas for the year.
Which law requires 426 E First St to report its energy use?
426 E First 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:104539:2024). 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 office buildings in Boston
- 52-58 Chauncy St· 79,056 sq ft · score 79 (B)
- 24-32 Farnsworth St· 78,860 sq ft · score 58 (C)
- 100-102 Tremont St· 78,608 sq ft · score 57 (C)
- 15-19 Broad St· 77,678 sq ft · score 82 (B)
- Office building #102361· 76,315 sq ft · score 79 (B)
- 177 Milk St· 76,300 sq ft · score 71 (B)
- Office buildings in Boston· 467 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 426 E First St's energy grade?
426 E First St did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 51.2 kBtu/ft².
How much energy does 426 E First St use?
Its 2024 site energy-use intensity was 51.2 kBtu/ft² across 80,000 sq ft, including 394,152 kWh of electricity and 27,505 therms of natural gas.
What are 426 E First St's carbon emissions?
426 E First St reported 223 tCO₂e of greenhouse-gas emissions for 2024.
Where is 426 E First St?
426 E First St is in Boston, Massachusetts 2210.
How big is 426 E First St and when was it built?
426 E First St has 80,000 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as office.
Is 426 E First 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, “426 E First St, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/426-e-first-st-80c74c36 (data as of July 9, 2026).