Fannie Mae 4250 (220626) SSL: 2047-0001
Office in Washington, DC, DC · 4250 Connecticut Ave NW · 20008
At a glance
Fannie Mae 4250 (220626) SSL: 2047-0001 is a 220,495-square-foot office building at 4250 Connecticut Ave NW in Washington, DC, built in 1982. In its 2018 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 92 out of 100 (grade A), a site energy-use intensity of 83.6 kBtu/ft² and 1,626 tCO₂e of greenhouse-gas emissions. That score is higher than 93% of the 774 scored office buildings in Washington, DC.
Clean and Affordable Energy Act / BEPS · reporting year 2018
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 92 (band A) |
| Site EUI | 83.6 kBtu/ft² |
| Source EUI | 208.3 kBtu/ft² |
| GHG emissions | 1,626 tCO₂e |
| GHG intensity | 7.4 kgCO₂e/ft² |
| Electricity | 4,450,963 kWh |
| Natural gas | 32,494 therms |
| Water use | 1,774 kgal |
| Gross floor area | 220,495 sq ft |
| Source record | dc:PM4929642:2018 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2018latest | 92 | +45 | 83.6 kBtu/ft² | 1,626 tCO₂e |
| 2017 | 47 | -10 | 76.1 kBtu/ft² | 1,541 tCO₂e |
| 2015 | 57 | +1 | 86.2 kBtu/ft² | 2,262 tCO₂e |
| 2014 | 56 | -1 | 88.9 kBtu/ft² | 2,281 tCO₂e |
| 2013 | 57 | 85.1 kBtu/ft² | 2,249 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
FEDERAL NATIONAL MORTGAGE ASSOCIATION & WMATA
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Location
- Address
- 4250 Connecticut Ave NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20008
- Coordinates
- 38.94394, -77.06358
Within ~1 km
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See also: most efficient in Washington, DC · biggest emitters
How does Fannie Mae 4250 (220626) SSL: 2047-0001 compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. Fannie Mae 4250 (220626) SSL: 2047-0001's ENERGY STAR score of 92 compares with an average of 70 across the 774 that report a score; it scores higher than 93% of them and lower than 6%. Its site EUI of 83.6 kBtu/ft² is about 50% above the average of 55.6 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 7.4 kgCO₂e/ft² is about 48% above the group average of 5.0 kgCO₂e/ft².
At 220,495 sq ft, it is roughly in line with the average floor area of 216,135 sq ft for those buildings. It was built in 1982, 8 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 Fannie Mae 4250 (220626) SSL: 2047-0001's energy performance changed over time?
BuildingCensus holds 5 Washington, DC disclosures for Fannie Mae 4250 (220626) SSL: 2047-0001, covering report years 2013, 2014, 2015, 2017, 2018. Its ENERGY STAR score went from 57 in 2013 to 92 in 2018 (+35 points). Site EUI moved from 85.1 kBtu/ft² (2013) to 83.6 kBtu/ft² (2018), a 2% decrease. Reported emissions went from 2,249 tCO₂e to 1,626 tCO₂e over the same span (down 28%).
What does an ENERGY STAR score of 92 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 92 means the building performs better than about 92% of its national peers. BuildingCensus bands the score into report-card grades; 92 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. Fannie Mae 4250 (220626) SSL: 2047-0001's 83.6 kBtu/ft² across 220,495 sq ft works out to about 18.4 billion Btu (5,402 MWh-equivalent) in 2018. Its source EUI of 208.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 4,450,963 kWh of electricity, 32,494 therms of natural gas and 1,774 thousand gallons of water for the year.
Which law requires Fannie Mae 4250 (220626) SSL: 2047-0001 to report its energy use?
Fannie Mae 4250 (220626) SSL: 2047-0001 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 2018 disclosure (source record dc:PM4929642:2018). 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
- 1717 Penn Ave· 219,899 sq ft · score 47 (D)
- 1801 Pennsylvania Avenue, LLC· 219,284 sq ft · score 81 (B)
- 1875 K Street· 218,206 sq ft · score 86 (A)
- 2550 M Street NW· 217,956 sq ft · score 68 (C)
- 2121 K Street· 217,890 sq ft · score 82 (B)
- 1140 Connecticut Ave for DDOE· 217,549 sq ft
- 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
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- Biggest emitters in Washington, DC
Frequently asked questions
What is Fannie Mae 4250 (220626) SSL: 2047-0001's energy grade?
Fannie Mae 4250 (220626) SSL: 2047-0001 scores 92 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2018 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Fannie Mae 4250 (220626) SSL: 2047-0001 use?
Its 2018 site energy-use intensity was 83.6 kBtu/ft² (208.3 kBtu/ft² source) across 220,495 sq ft, including 4,450,963 kWh of electricity and 32,494 therms of natural gas.
What are Fannie Mae 4250 (220626) SSL: 2047-0001's carbon emissions?
Fannie Mae 4250 (220626) SSL: 2047-0001 reported 1,626 tCO₂e of greenhouse-gas emissions (7.4 kgCO₂e/ft²) for 2018.
Where is Fannie Mae 4250 (220626) SSL: 2047-0001?
Fannie Mae 4250 (220626) SSL: 2047-0001 is at 4250 Connecticut Ave NW, in Washington, DC 20008. Its coordinates are 38.94394, -77.06358 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Fannie Mae 4250 (220626) SSL: 2047-0001 and when was it built?
Fannie Mae 4250 (220626) SSL: 2047-0001 has 220,495 sq ft of gross floor area, as reported in its 2018 disclosure. The disclosure lists 1982 as its year built. It is classed as office.
Is Fannie Mae 4250 (220626) SSL: 2047-0001 covered by the Clean and Affordable Energy Act / BEPS?
Yes — it appears in the 2018 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, “Fannie Mae 4250 (220626) SSL: 2047-0001, Washington, DC — 2018 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/fannie-mae-4250-220626-ssl-2047-0001-7b9e26da (data as of July 9, 2026).