429 L'Enfant Plaza (L'Enfant Plaza Retail)
Office in Washington, DC, DC · 429 L'Enfant Plaza, SW · 20024
At a glance
429 L'Enfant Plaza (L'Enfant Plaza Retail) is a 203,729-square-foot office building at 429 L'Enfant Plaza, SW in Washington, DC, built in 1973. In its 2024 Washington, DC benchmarking disclosure it reported a site energy-use intensity of 38.0 kBtu/ft² and 595 tCO₂e of greenhouse-gas emissions.
Clean and Affordable Energy Act / BEPS · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 38.0 kBtu/ft² |
| Source EUI | 85.4 kBtu/ft² |
| GHG emissions | 595 tCO₂e |
| GHG intensity | 2.9 kgCO₂e/ft² |
| Electricity | 1,553,071 kWh |
| Natural gas | 24,456 therms |
| Water use | 1,352 kgal |
| Gross floor area | 203,729 sq ft |
| Source record | dc:PM4866016:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 38.0 kBtu/ft² | 595 tCO₂e | |
| 2023 | — | 35.4 kBtu/ft² | 569 tCO₂e | |
| 2022 | — | 39.3 kBtu/ft² | 643 tCO₂e | |
| 2021 | — | 35.2 kBtu/ft² | 580 tCO₂e | |
| 2020 | — | 37.7 kBtu/ft² | 609 tCO₂e | |
| 2019 | — | 64.7 kBtu/ft² | 1,110 tCO₂e | |
| 2018 | — | 123.5 kBtu/ft² | 2,299 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
STONELEX C, LLC
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 429 L'Enfant Plaza, SW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20024
- Coordinates
- 38.88384, -77.02517
Within ~1 km
Nearby benchmarked buildings
- Constitution Centerscore 83
Office · 1,582,262 sq ft
- Portals IIscore 86
Office · 674,936 sq ft
- Waterside Towers and Townhomesscore 81
Multifamily Housing · 674,080 sq ft
- The Channel (lh71)score —
Multifamily Housing · 603,003 sq ft
- Capital Galleryscore 74
Office · 572,811 sq ft
- 670 Mainescore 69
Office · 571,109 sq ft
See also: most efficient in Washington, DC · biggest emitters
How does 429 L'Enfant Plaza (L'Enfant Plaza Retail) 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 38.0 kBtu/ft² is about 32% 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 2.9 kgCO₂e/ft² is about 42% below the group average of 5.0 kgCO₂e/ft².
At 203,729 sq ft, it is roughly in line with the average floor area of 216,135 sq ft for those buildings. Its 1973 construction date is close to 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 429 L'Enfant Plaza (L'Enfant Plaza Retail)'s energy performance changed over time?
BuildingCensus holds 7 Washington, DC disclosures for 429 L'Enfant Plaza (L'Enfant Plaza Retail), covering report years 2018–2024. Site EUI moved from 123.5 kBtu/ft² (2018) to 38.0 kBtu/ft² (2024), a 69% decrease. Reported emissions went from 2,299 tCO₂e to 595 tCO₂e over the same span (down 74%).
What does a site EUI of 38.0 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. 429 L'Enfant Plaza (L'Enfant Plaza Retail)'s 38.0 kBtu/ft² across 203,729 sq ft works out to about 7.7 billion Btu (2,269 MWh-equivalent) in 2024. Its source EUI of 85.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,553,071 kWh of electricity, 24,456 therms of natural gas and 1,352 thousand gallons of water for the year.
Which law requires 429 L'Enfant Plaza (L'Enfant Plaza Retail) to report its energy use?
429 L'Enfant Plaza (L'Enfant Plaza Retail) 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:PM4866016:2024). 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
- 499 S Capitol Street SW - Washington· 203,031 sq ft · score 56 (C)
- 1201 M Street· 202,273 sq ft · score 95 (A)
- 1445 New York· 200,913 sq ft · score 90 (A)
- US Chamber of Commerce· 200,891 sq ft · score 82 (B)
- 4250 Connecticut Ave NW· 200,761 sq ft
- 777 Sixth Street NW (Brightly)· 199,861 sq ft · score 81 (B)
- Office buildings in Washington, DC· 899 benchmarked
- All Washington, DC benchmarked buildings· Clean and Affordable Energy Act / BEPS
- Most efficient large buildings in Washington, DC
- Least efficient large buildings in Washington, DC
- Biggest emitters in Washington, DC
Frequently asked questions
What is 429 L'Enfant Plaza (L'Enfant Plaza Retail)'s energy grade?
429 L'Enfant Plaza (L'Enfant Plaza Retail) did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 38.0 kBtu/ft².
How much energy does 429 L'Enfant Plaza (L'Enfant Plaza Retail) use?
Its 2024 site energy-use intensity was 38.0 kBtu/ft² (85.4 kBtu/ft² source) across 203,729 sq ft, including 1,553,071 kWh of electricity and 24,456 therms of natural gas.
What are 429 L'Enfant Plaza (L'Enfant Plaza Retail)'s carbon emissions?
429 L'Enfant Plaza (L'Enfant Plaza Retail) reported 595 tCO₂e of greenhouse-gas emissions (2.9 kgCO₂e/ft²) for 2024.
Where is 429 L'Enfant Plaza (L'Enfant Plaza Retail)?
429 L'Enfant Plaza (L'Enfant Plaza Retail) is at 429 L'Enfant Plaza, SW, in Washington, DC 20024. Its coordinates are 38.88384, -77.02517 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 429 L'Enfant Plaza (L'Enfant Plaza Retail) and when was it built?
429 L'Enfant Plaza (L'Enfant Plaza Retail) has 203,729 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1973 as its year built. It is classed as office.
Is 429 L'Enfant Plaza (L'Enfant Plaza Retail) 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.
Working with Washington, DC building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “429 L'Enfant Plaza (L'Enfant Plaza Retail), Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/429-l-enfant-plaza-l-enfant-plaza-retail-37ca3b4d (data as of July 9, 2026).