Rivendell on the Park
Multifamily Housing in Washington, DC, DC · 1666 OAK ST NW · 20010
At a glance
Rivendell on the Park is a 42,285-square-foot multifamily housing building at 1666 OAK ST NW in Washington, DC, built in 1982. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 97 out of 100 (grade A), a site energy-use intensity of 43.2 kBtu/ft² and 119 tCO₂e of greenhouse-gas emissions. That score is higher than 87% 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 | 97 (band A) |
| Site EUI | 43.2 kBtu/ft² |
| Source EUI | 71.3 kBtu/ft² |
| GHG emissions | 119 tCO₂e |
| GHG intensity | 2.8 kgCO₂e/ft² |
| Electricity | 183,461 kWh |
| Natural gas | 12,022 therms |
| Water use | 987 kgal |
| Gross floor area | 42,285 sq ft |
| Source record | dc:PM20474809:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 97 | -1 | 43.2 kBtu/ft² | 119 tCO₂e |
| 2023 | 98 | +1 | 40.5 kBtu/ft² | 112 tCO₂e |
| 2022 | 97 | 44.0 kBtu/ft² | 122 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
RIVENDELL ON THE PARK CONDO
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Location
- Address
- 1666 OAK ST NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20010
- Coordinates
- 38.93573, -77.03860
Within ~1 km
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See also: most efficient in Washington, DC · biggest emitters
How does Rivendell on the Park 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. Rivendell on the Park's ENERGY STAR score of 97 compares with an average of 72 across the 1,618 that report a score; it scores higher than 87% of them and lower than 10%. Its site EUI of 43.2 kBtu/ft² is about 15% below the average of 51.1 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.8 kgCO₂e/ft² is about 26% below the group average of 3.8 kgCO₂e/ft².
At 42,285 sq ft, it is about 69% below the average floor area of 136,346 sq ft for those buildings. It was built in 1982, 17 years later than 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 Rivendell on the Park's energy performance changed over time?
BuildingCensus holds 3 Washington, DC disclosures for Rivendell on the Park, covering report years 2022–2024. Its ENERGY STAR score was 97 in both 2022 and 2024. Site EUI moved from 44.0 kBtu/ft² (2022) to 43.2 kBtu/ft² (2024), a 2% decrease. Reported emissions went from 122 tCO₂e to 119 tCO₂e over the same span (down 3%).
What does an ENERGY STAR score of 97 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 97 means the building performs better than about 97% of its national peers. BuildingCensus bands the score into report-card grades; 97 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 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. Rivendell on the Park's 43.2 kBtu/ft² across 42,285 sq ft works out to about 1.8 billion Btu (535 MWh-equivalent) in 2024. Its source EUI of 71.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 183,461 kWh of electricity, 12,022 therms of natural gas and 987 thousand gallons of water for the year.
Which law requires Rivendell on the Park to report its energy use?
Rivendell on the Park 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:PM20474809:2024). 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
- TAYLOR TOWERS· 42,252 sq ft
- Dumbarton Court Coop· 42,110 sq ft · score 97 (A)
- 734 Longfellow· 42,071 sq ft · score 98 (A)
- Logan Court Condominium· 42,044 sq ft · score 95 (A)
- 5112 Connecticut Avenue Cooperative· 41,992 sq ft · score 92 (A)
- Hillside Condo· 41,978 sq ft · score 98 (A)
- Multifamily Housing buildings in Washington, DC· 1,799 benchmarked
- All Washington, DC benchmarked buildings· Clean and Affordable Energy Act / BEPS
- Most efficient large buildings in Washington, DC
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- Biggest emitters in Washington, DC
Frequently asked questions
What is Rivendell on the Park's energy grade?
Rivendell on the Park scores 97 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Rivendell on the Park use?
Its 2024 site energy-use intensity was 43.2 kBtu/ft² (71.3 kBtu/ft² source) across 42,285 sq ft, including 183,461 kWh of electricity and 12,022 therms of natural gas.
What are Rivendell on the Park's carbon emissions?
Rivendell on the Park reported 119 tCO₂e of greenhouse-gas emissions (2.8 kgCO₂e/ft²) for 2024.
Where is Rivendell on the Park?
Rivendell on the Park is at 1666 OAK ST NW, in Washington, DC 20010. Its coordinates are 38.93573, -77.03860 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Rivendell on the Park and when was it built?
Rivendell on the Park has 42,285 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1982 as its year built. It is classed as multifamily housing.
Is Rivendell on the Park 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, “Rivendell on the Park, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/rivendell-on-the-park-3f1f58ac (data as of July 9, 2026).