Blackstone Flats Condominium
Multifamily Housing in Washington, DC, DC · 4469 B ST SE · 20019
At a glance
Blackstone Flats Condominium is a 42,939-square-foot multifamily housing building at 4469 B ST SE in Washington, DC, built in 1968.
Clean and Affordable Energy Act / BEPS · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 0 kWh |
| Natural gas | 0 therms |
| Gross floor area | 42,939 sq ft |
| Source record | dc:PM20405282:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | — | — | |
| 2023 | — | — | — | |
| 2022 | 91 | 27.2 kBtu/ft² | 105 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
BLACKSTONE FLATS CONDOMINIUM
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 4469 B ST SE
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20019
- Coordinates
- 38.88733, -76.93769
Within ~1 km
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- Conway Center: Conway Centerscore 100
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See also: most efficient in Washington, DC · biggest emitters
How does Blackstone Flats Condominium 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.
At 42,939 sq ft, it is about 69% below the average floor area of 136,346 sq ft for those buildings. Its 1968 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 Blackstone Flats Condominium's energy performance changed over time?
BuildingCensus holds 3 Washington, DC disclosures for Blackstone Flats Condominium, covering report years 2022–2024. Only one of those years carries energy figures.
Which law requires Blackstone Flats Condominium to report its energy use?
Blackstone Flats Condominium 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:PM20405282:2024). 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
- THE ASHLEY CONDOMINIUM· 42,937 sq ft · score 94 (A)
- 3030 30th Street SE· 42,915 sq ft · score 67 (C)
- Hampstead V (aka Concord North)· 42,900 sq ft · score 89 (A)
- Edgewater Condominium· 42,896 sq ft · score 16 (D)
- New Quin - 811 Quincy St NW· 42,870 sq ft · score 67 (C)
- The Shelburne· 42,792 sq ft · score 90 (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
- Least efficient large buildings in Washington, DC
- Biggest emitters in Washington, DC
Frequently asked questions
What is Blackstone Flats Condominium's energy grade?
Blackstone Flats Condominium did not report an ENERGY STAR score in its 2024 disclosure.
How much energy does Blackstone Flats Condominium use?
No energy-use intensity was reported for 2024.
What are Blackstone Flats Condominium's carbon emissions?
No greenhouse-gas emissions figure was reported for 2024.
Where is Blackstone Flats Condominium?
Blackstone Flats Condominium is at 4469 B ST SE, in Washington, DC 20019. Its coordinates are 38.88733, -76.93769 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Blackstone Flats Condominium and when was it built?
Blackstone Flats Condominium has 42,939 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1968 as its year built. It is classed as multifamily housing.
Is Blackstone Flats Condominium 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, “Blackstone Flats Condominium, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/blackstone-flats-condominium-61341d44 (data as of July 9, 2026).