Tiber Island Cooperative Homes, Inc.
Multifamily Housing in Washington, DC, DC · 429 N Street SW · 20024
At a glance
Tiber Island Cooperative Homes, Inc. is a 451,151-square-foot multifamily housing building at 429 N Street SW in Washington, DC, built in 1964. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 82 out of 100 (grade B), a site energy-use intensity of 51.9 kBtu/ft² and 1,580 tCO₂e of greenhouse-gas emissions. That score is higher than 54% of the 1,618 scored multifamily housing buildings in Washington, DC.
Clean and Affordable Energy Act / BEPS · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 82 (band B) |
| Site EUI | 51.9 kBtu/ft² |
| Source EUI | 92.2 kBtu/ft² |
| GHG emissions | 1,580 tCO₂e |
| GHG intensity | 3.5 kgCO₂e/ft² |
| Electricity | 2,852,863 kWh |
| Natural gas | 136,594 therms |
| Water use | 15,065 kgal |
| Gross floor area | 451,151 sq ft |
| Source record | dc:PM2791015:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 82 | -2 | 51.9 kBtu/ft² | 1,580 tCO₂e |
| 2023 | 84 | +6 | 47.7 kBtu/ft² | 1,486 tCO₂e |
| 2022 | 78 | +7 | 53.9 kBtu/ft² | 1,644 tCO₂e |
| 2021 | 71 | +1 | 56.2 kBtu/ft² | 1,784 tCO₂e |
| 2020 | 70 | +7 | 56.0 kBtu/ft² | 1,768 tCO₂e |
| 2019 | 63 | +3 | 61.4 kBtu/ft² | 1,947 tCO₂e |
| 2018 | 60 | +36 | 64.7 kBtu/ft² | 2,039 tCO₂e |
| 2017 | 24 | -3 | 79.4 kBtu/ft² | 2,016 tCO₂e |
| 2016 | 27 | -9 | 83.7 kBtu/ft² | 2,118 tCO₂e |
| 2015 | 36 | +13 | 81.4 kBtu/ft² | 2,208 tCO₂e |
| 2014 | 23 | 84.1 kBtu/ft² | 2,398 tCO₂e | |
| 2013 | — | — | — | |
| 2012 | — | 65.6 kBtu/ft² | 1,863 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
TIBER ISLAND COOPERATIVE HOMES
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Location
- Address
- 429 N Street SW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20024
- Coordinates
- 38.87545, -77.01926
Within ~1 km
Nearby benchmarked buildings
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- The Channel (lh71)score —
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See also: most efficient in Washington, DC · biggest emitters
How does Tiber Island Cooperative Homes, Inc. compare with other multifamily housing buildings in Washington, DC?
The latest disclosures cover 1,799 multifamily housing buildings in Washington, DC, out of 6,870 buildings citywide. Tiber Island Cooperative Homes, Inc.'s ENERGY STAR score of 82 compares with an average of 72 across the 1,618 that report a score; it scores higher than 54% of them and lower than 44%. Its site EUI of 51.9 kBtu/ft² is roughly in line with the average of 51.1 kBtu/ft². Its emissions intensity of 3.5 kgCO₂e/ft² is roughly in line with the group average of 3.8 kgCO₂e/ft².
At 451,151 sq ft, it is about 231% above the average floor area of 136,346 sq ft for those buildings. Its 1964 construction date is close to the group's average year built (1965). 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 Tiber Island Cooperative Homes, Inc.'s energy performance changed over time?
BuildingCensus holds 13 Washington, DC disclosures for Tiber Island Cooperative Homes, Inc., covering report years 2012–2024. Its ENERGY STAR score went from 23 in 2014 to 82 in 2024 (+59 points); its best year on file was 2023, at 84. Site EUI moved from 65.6 kBtu/ft² (2012) to 51.9 kBtu/ft² (2024), a 21% decrease. Reported emissions went from 1,863 tCO₂e to 1,580 tCO₂e over the same span (down 15%).
What does an ENERGY STAR score of 82 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 82 means the building performs better than about 82% of its national peers. BuildingCensus bands the score into report-card grades; 82 falls in band B — above median (70–84). 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 Washington, DC, 47% 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. Tiber Island Cooperative Homes, Inc.'s 51.9 kBtu/ft² across 451,151 sq ft works out to about 23.4 billion Btu (6,862 MWh-equivalent) in 2024. Its source EUI of 92.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,852,863 kWh of electricity, 136,594 therms of natural gas and 15,065 thousand gallons of water for the year.
Which law requires Tiber Island Cooperative Homes, Inc. to report its energy use?
Tiber Island Cooperative Homes, Inc. 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:PM2791015:2024). 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 multifamily housing buildings in Washington, DC
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Frequently asked questions
What is Tiber Island Cooperative Homes, Inc.'s energy grade?
Tiber Island Cooperative Homes, Inc. scores 82 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Tiber Island Cooperative Homes, Inc. use?
Its 2024 site energy-use intensity was 51.9 kBtu/ft² (92.2 kBtu/ft² source) across 451,151 sq ft, including 2,852,863 kWh of electricity and 136,594 therms of natural gas.
What are Tiber Island Cooperative Homes, Inc.'s carbon emissions?
Tiber Island Cooperative Homes, Inc. reported 1,580 tCO₂e of greenhouse-gas emissions (3.5 kgCO₂e/ft²) for 2024.
Where is Tiber Island Cooperative Homes, Inc.?
Tiber Island Cooperative Homes, Inc. is at 429 N Street SW, in Washington, DC 20024. Its coordinates are 38.87545, -77.01926 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Tiber Island Cooperative Homes, Inc. and when was it built?
Tiber Island Cooperative Homes, Inc. has 451,151 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1964 as its year built. It is classed as multifamily housing.
Is Tiber Island Cooperative Homes, Inc. 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, “Tiber Island Cooperative Homes, Inc., Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/tiber-island-cooperative-homes-inc-1ddc9eba (data as of July 9, 2026).