3-5 Longfellow Pl

How does 3-5 Longfellow Pl 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. 3-5 Longfellow Pl's ENERGY STAR score of 89 compares with an average of 71 across the 1,225 that report a score; it scores higher than 64% of them and lower than 34%. Its site EUI of 41.4 kBtu/ft² is about 39% below the average of 67.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 444,230 sq ft, it is about 665% above 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 3-5 Longfellow Pl's energy performance changed over time?

BuildingCensus holds 3 Boston disclosures for 3-5 Longfellow Pl, covering report years 2022–2024. Its ENERGY STAR score went from 86 in 2022 to 89 in 2024 (+3 points); its best year on file was 2023, at 92. Site EUI moved from 45.0 kBtu/ft² (2022) to 41.4 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 1,429 tCO₂e to 1,031 tCO₂e over the same span (down 28%).

What does an ENERGY STAR score of 89 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 89 means the building performs better than about 89% of its national peers. BuildingCensus bands the score into report-card grades; 89 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. 3-5 Longfellow Pl's 41.4 kBtu/ft² across 444,230 sq ft works out to about 18.4 billion Btu (5,390 MWh-equivalent) in 2024. The disclosure also reports 4,008,465 kWh of electricity and 47,335 therms of natural gas for the year.

Which law requires 3-5 Longfellow Pl to report its energy use?

3-5 Longfellow Pl 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:101712:2024). 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.