Harbourside
Office in Washington, DC, DC · 2900 K St. NW · 20007
At a glance
Harbourside is a 165,491-square-foot office building at 2900 K St. NW in Washington, DC, built in 2008. In its 2024 Washington, DC benchmarking disclosure it reported a site energy-use intensity of 37.4 kBtu/ft² and 541 tCO₂e of greenhouse-gas emissions.
Clean and Affordable Energy Act / BEPS · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 37.4 kBtu/ft² |
| Source EUI | 104.1 kBtu/ft² |
| GHG emissions | 541 tCO₂e |
| GHG intensity | 3.3 kgCO₂e/ft² |
| Electricity | 1,798,216 kWh |
| Natural gas | 511 therms |
| Water use | 3,228 kgal |
| Gross floor area | 165,491 sq ft |
| Source record | dc:PM1273462:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 37.4 kBtu/ft² | 541 tCO₂e | |
| 2023 | — | 44.8 kBtu/ft² | 663 tCO₂e | |
| 2022 | — | 44.8 kBtu/ft² | 662 tCO₂e | |
| 2021 | 58 | -1 | 46.0 kBtu/ft² | 684 tCO₂e |
| 2020 | 59 | -11 | 48.1 kBtu/ft² | 736 tCO₂e |
| 2019 | 70 | -8 | 45.5 kBtu/ft² | 697 tCO₂e |
| 2018 | 78 | -1 | 39.9 kBtu/ft² | 611 tCO₂e |
| 2017 | 79 | -6 | 53.7 kBtu/ft² | 953 tCO₂e |
| 2016 | 85 | -10 | 52.6 kBtu/ft² | 932 tCO₂e |
| 2015 | 95 | ±0 | 36.0 kBtu/ft² | 922 tCO₂e |
| 2014 | 95 | +6 | 37.0 kBtu/ft² | 949 tCO₂e |
| 2013 | 89 | -6 | 44.9 kBtu/ft² | 1,089 tCO₂e |
| 2012 | 95 | 35.8 kBtu/ft² | 870 tCO₂e |
Compliance context
Clean and Affordable Energy Act / BEPS
DC's Building Energy Performance Standards (BEPS) require buildings below the performance standard to improve over compliance cycles (the first ends December 31, 2026; later cycles run five years), with penalties for buildings that fail to meet their pathway.
Ownership
THE RESIDENCES @ HARBOURSIDE
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Location
- Address
- 2900 K St. NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20007
- Coordinates
- 38.90199, -77.05870
Within ~1 km
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See also: most efficient in Washington, DC · biggest emitters
How does Harbourside compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. Its site EUI of 37.4 kBtu/ft² is about 33% below the average of 55.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.3 kgCO₂e/ft² is about 35% below the group average of 5.0 kgCO₂e/ft².
At 165,491 sq ft, it is about 23% below the average floor area of 216,135 sq ft for those buildings. It was built in 2008, 34 years later than the group's average year built (1974). 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 Harbourside's energy performance changed over time?
BuildingCensus holds 13 Washington, DC disclosures for Harbourside, covering report years 2012–2024. Its ENERGY STAR score went from 95 in 2012 to 58 in 2021 (-37 points); its best year on file was 2012, at 95. Site EUI moved from 35.8 kBtu/ft² (2012) to 37.4 kBtu/ft² (2024), an 4% increase. Reported emissions went from 870 tCO₂e to 541 tCO₂e over the same span (down 38%).
What does a site EUI of 37.4 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. Harbourside's 37.4 kBtu/ft² across 165,491 sq ft works out to about 6.2 billion Btu (1,814 MWh-equivalent) in 2024. Its source EUI of 104.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,798,216 kWh of electricity, 511 therms of natural gas and 3,228 thousand gallons of water for the year.
Which law requires Harbourside to report its energy use?
Harbourside reports under the Clean and Affordable Energy Act / BEPS, the legal basis of Washington, DC's Building Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record dc:PM1273462:2024). DC's Building Energy Performance Standards (BEPS) require buildings below the performance standard to improve over compliance cycles (the first ends December 31, 2026; later cycles run five years), with penalties for buildings that fail to meet their pathway.
More office buildings in Washington, DC
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- Office buildings in Washington, DC· 899 benchmarked
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- Most efficient large buildings in Washington, DC
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- Biggest emitters in Washington, DC
Frequently asked questions
What is Harbourside's energy grade?
Harbourside did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 37.4 kBtu/ft².
How much energy does Harbourside use?
Its 2024 site energy-use intensity was 37.4 kBtu/ft² (104.1 kBtu/ft² source) across 165,491 sq ft, including 1,798,216 kWh of electricity and 511 therms of natural gas.
What are Harbourside's carbon emissions?
Harbourside reported 541 tCO₂e of greenhouse-gas emissions (3.3 kgCO₂e/ft²) for 2024.
Where is Harbourside?
Harbourside is at 2900 K St. NW, in Washington, DC 20007. Its coordinates are 38.90199, -77.05870 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Harbourside and when was it built?
Harbourside has 165,491 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2008 as its year built. It is classed as office.
Is Harbourside covered by the Clean and Affordable Energy Act / BEPS?
Yes — it appears in the 2024 Building Energy Benchmarking disclosure, which lists the buildings reporting under the Clean and Affordable Energy Act / BEPS.
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About this data
Source: Building Energy Benchmarking (Clean and Affordable Energy Act / BEPS), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Harbourside, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/harbourside-c0bf4c47 (data as of July 9, 2026).