At a glance
685 Tremont St is a 11,342-square-foot library in Boston, Massachusetts. In its 2024 Boston benchmarking disclosure it reported a site energy-use intensity of 15.7 kBtu/ft² and 10 tCO₂e of greenhouse-gas emissions.
BERDO 2.0 · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 15.7 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 10 tCO₂e |
| GHG intensity | — |
| Electricity | 52,080 kWh |
| Gross floor area | 11,342 sq ft |
| Source record | boston:106908:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 15.7 kBtu/ft² | 10 tCO₂e | |
| 2023 | — | 22.5 kBtu/ft² | 15 tCO₂e | |
| 2022 | — | 41.3 kBtu/ft² | 37 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
CITY OF BOSTON
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Location
- Address
- 685 Tremont St
- City
- Boston
- State
- Massachusetts
- ZIP
- 2118.
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 685 Tremont St compare with other library buildings in Boston?
The latest disclosures cover 26 library buildings in Boston, out of 6,305 buildings citywide. Its site EUI of 15.7 kBtu/ft² is about 78% below the average of 70.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 11,342 sq ft, it is about 78% below the average floor area of 52,053 sq ft for those buildings.
How has 685 Tremont St's energy performance changed over time?
BuildingCensus holds 3 Boston disclosures for 685 Tremont St, covering report years 2022–2024. Site EUI moved from 41.3 kBtu/ft² (2022) to 15.7 kBtu/ft² (2024), a 62% decrease. Reported emissions went from 37 tCO₂e to 10 tCO₂e over the same span (down 73%).
What does a site EUI of 15.7 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. 685 Tremont St's 15.7 kBtu/ft² across 11,342 sq ft works out to about 0.2 billion Btu (52 MWh-equivalent) in 2024. The disclosure also reports 52,080 kWh of electricity for the year.
Which law requires 685 Tremont St to report its energy use?
685 Tremont 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:106908:2024). 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 library buildings in Boston
- E Broadway· 10,800 sq ft · EUI 55.8 kBtu/ft²
- 27 Richmond St· 9,940 sq ft · EUI 79.8 kBtu/ft²
- 433 Centre St· 9,240 sq ft · EUI 99.5 kBtu/ft²
- 1497 Tremont St· 9,136 sq ft · EUI 32.5 kBtu/ft²
- Park St· 8,410 sq ft · EUI 52.0 kBtu/ft²
- 25 Parmenter St· 7,600 sq ft · EUI 94.4 kBtu/ft²
- Library buildings in Boston· 26 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 685 Tremont St's energy grade?
685 Tremont St did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 15.7 kBtu/ft².
How much energy does 685 Tremont St use?
Its 2024 site energy-use intensity was 15.7 kBtu/ft² across 11,342 sq ft, including 52,080 kWh of electricity.
What are 685 Tremont St's carbon emissions?
685 Tremont St reported 10 tCO₂e of greenhouse-gas emissions for 2024.
Where is 685 Tremont St?
685 Tremont St is in Boston, Massachusetts 2118.
How big is 685 Tremont St and when was it built?
685 Tremont St has 11,342 sq ft of gross floor area, as reported in its 2024 disclosure. It is classed as library.
Is 685 Tremont 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, “685 Tremont St, Boston, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/boston/685-tremont-st-32ce8e11 (data as of July 9, 2026).