At a glance
3501 Blake Street is a 39,936-square-foot office building in Denver, Colorado, built in 2021. In its 2023 Denver benchmarking disclosure it reported an ENERGY STAR score of 35 out of 100 (grade D), a site energy-use intensity of 56.6 kBtu/ft² and 288 tCO₂e of greenhouse-gas emissions. That score is higher than 8% of the 339 scored office buildings in Denver.
Energize Denver Building Performance Policy · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 35 (band D) |
| Site EUI | 56.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 288 tCO₂e |
| GHG intensity | — |
| Electricity | 484,124 kWh |
| Natural gas | 6,082 therms |
| Gross floor area | 39,936 sq ft |
| Source record | denver:6145:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 35 | -18 | 56.6 kBtu/ft² | 288 tCO₂e |
| 2022 | 53 | -6 | 45.6 kBtu/ft² | 232 tCO₂e |
| 2021 | 59 | 46.0 kBtu/ft² | 224 tCO₂e |
Compliance context
Energize Denver Building Performance Policy
Energize Denver sets energy-use (EUI) targets for buildings of 25,000+ sq ft — for most buildings an interim target in 2028 and a final target in 2032 — with civil penalties of roughly $0.15–0.35 per kBtu over target for non-compliance.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 3501 Blake St
- City
- Denver
- State
- Colorado
- ZIP
- 80205
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in Denver · biggest emitters
How does 3501 Blake Street compare with other office buildings in Denver?
The latest disclosures cover 427 office buildings in Denver, out of 3,287 buildings citywide. 3501 Blake Street's ENERGY STAR score of 35 compares with an average of 71 across the 339 that report a score; it scores higher than 8% of them and lower than 91%. Its site EUI of 56.6 kBtu/ft² is about 16% below the average of 67.1 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 39,936 sq ft, it is about 75% below the average floor area of 157,927 sq ft for those buildings. It was built in 2021, 41 years later than the group's average year built (1980). 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 3501 Blake Street's energy performance changed over time?
BuildingCensus holds 3 Denver disclosures for 3501 Blake Street, covering report years 2021–2023. Its ENERGY STAR score went from 59 in 2021 to 35 in 2023 (-24 points); its best year on file was 2021, at 59. Site EUI moved from 46.0 kBtu/ft² (2021) to 56.6 kBtu/ft² (2023), an 23% increase. Reported emissions went from 224 tCO₂e to 288 tCO₂e over the same span (up 29%).
What does an ENERGY STAR score of 35 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 35 means the building performs better than about 35% of its national peers. BuildingCensus bands the score into report-card grades; 35 falls in band D — lowest band (1–54). It sits 40 points below 75, the threshold for ENERGY STAR certification. In Denver, 54% 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. 3501 Blake Street's 56.6 kBtu/ft² across 39,936 sq ft works out to about 2.3 billion Btu (662 MWh-equivalent) in 2023. The disclosure also reports 484,124 kWh of electricity and 6,082 therms of natural gas for the year.
Which law requires 3501 Blake Street to report its energy use?
3501 Blake Street reports under the Energize Denver Building Performance Policy, the legal basis of Denver's Energize Denver Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2023 disclosure (source record denver:6145:2023). Energize Denver sets energy-use (EUI) targets for buildings of 25,000+ sq ft — for most buildings an interim target in 2028 and a final target in 2032 — with civil penalties of roughly $0.15–0.35 per kBtu over target for non-compliance.
More office buildings in Denver
- Adar Sheni· 39,804 sq ft · score 57 (C)
- Comcast 1601 Mile High Stadium Circle· 39,690 sq ft · score 1 (D)
- 201 Columbine Street (2Nd &Amp; Josephine)· 39,579 sq ft · score 82 (B)
- Cpc - Fleet Maint - Bldg 5 - Solar· 39,546 sq ft · EUI 144.4 kBtu/ft²
- Upper Colfax Business Center· 39,467 sq ft · score 60 (C)
- Wheeler Block· 39,116 sq ft · score 68 (C)
- Office buildings in Denver· 427 benchmarked
- All Denver benchmarked buildings· Energize Denver Building Performance Policy
- Most efficient large buildings in Denver
- Least efficient large buildings in Denver
- Biggest emitters in Denver
Frequently asked questions
What is 3501 Blake Street's energy grade?
3501 Blake Street scores 35 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 Denver disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 3501 Blake Street use?
Its 2023 site energy-use intensity was 56.6 kBtu/ft² across 39,936 sq ft, including 484,124 kWh of electricity and 6,082 therms of natural gas.
What are 3501 Blake Street's carbon emissions?
3501 Blake Street reported 288 tCO₂e of greenhouse-gas emissions for 2023.
Where is 3501 Blake Street?
3501 Blake Street is in Denver, Colorado 80205.
How big is 3501 Blake Street and when was it built?
3501 Blake Street has 39,936 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2021 as its year built. It is classed as office.
Is 3501 Blake Street covered by the Energize Denver Building Performance Policy?
Yes — it appears in the 2023 Energize Denver Benchmarking disclosure, which lists the buildings reporting under the Energize Denver Building Performance Policy.
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About this data
Source: Energize Denver Benchmarking (Energize Denver Building Performance Policy), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “3501 Blake Street, Denver, Colorado — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/denver/3501-blake-street-5e5a7f9f (data as of July 9, 2026).