Aspen Leaf
Distribution Center in Denver, CO · 4800 Osage · 80221
At a glance
Aspen Leaf is a 108,000-square-foot distribution center at 4800 Osage in Denver, Colorado, built in 2003. In its 2023 Denver benchmarking disclosure it reported an ENERGY STAR score of 39 out of 100 (grade D), a site energy-use intensity of 55.1 kBtu/ft² and 606 tCO₂e of greenhouse-gas emissions. That score is higher than 19% of the 139 scored distribution center buildings in Denver.
Energize Denver Building Performance Policy · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 39 (band D) |
| Site EUI | 55.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 606 tCO₂e |
| GHG intensity | — |
| Electricity | 832,855 kWh |
| Natural gas | 31,139 therms |
| Gross floor area | 108,000 sq ft |
| Source record | denver:1935:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 39 | -8 | 55.1 kBtu/ft² | 606 tCO₂e |
| 2022 | 47 | +7 | 46.5 kBtu/ft² | 540 tCO₂e |
| 2021 | 40 | 51.7 kBtu/ft² | 633 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
- 4800 Osage
- City
- Denver
- State
- Colorado
- ZIP
- 80221
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 Aspen Leaf compare with other distribution center buildings in Denver?
The latest disclosures cover 188 distribution center buildings in Denver, out of 3,287 buildings citywide. Aspen Leaf's ENERGY STAR score of 39 compares with an average of 61 across the 139 that report a score; it scores higher than 19% of them and lower than 81%. Its site EUI of 55.1 kBtu/ft² is about 14% above the average of 48.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 108,000 sq ft, it is roughly in line with the average floor area of 103,624 sq ft for those buildings. It was built in 2003, 23 years later than the group's average year built (1980). Across all 24 jurisdictions BuildingCensus covers, the 4,082 distribution center buildings average an ENERGY STAR score of 65 and a site EUI of 24.2 kBtu/ft².
How has Aspen Leaf's energy performance changed over time?
BuildingCensus holds 3 Denver disclosures for Aspen Leaf, covering report years 2021–2023. Its ENERGY STAR score went from 40 in 2021 to 39 in 2023 (-1 points); its best year on file was 2022, at 47. Site EUI moved from 51.7 kBtu/ft² (2021) to 55.1 kBtu/ft² (2023), an 7% increase. Reported emissions went from 633 tCO₂e to 606 tCO₂e over the same span (down 4%).
What does an ENERGY STAR score of 39 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 39 means the building performs better than about 39% of its national peers. BuildingCensus bands the score into report-card grades; 39 falls in band D — lowest band (1–54). It sits 36 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. Aspen Leaf's 55.1 kBtu/ft² across 108,000 sq ft works out to about 6 billion Btu (1,744 MWh-equivalent) in 2023. The disclosure also reports 832,855 kWh of electricity and 31,139 therms of natural gas for the year.
Which law requires Aspen Leaf to report its energy use?
Aspen Leaf 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:1935:2023). 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 distribution center buildings in Denver
- National Wood Products· 107,946 sq ft · score 31 (D)
- Den00106 - Denver 1· 107,000 sq ft · score 77 (B)
- Fedex 9950· 105,800 sq ft · score 27 (D)
- Moline· 104,891 sq ft · score 84 (B)
- Fedex Building Federal Cargo A· 104,700 sq ft · score 14 (D)
- 11575 East 40Th Avenue· 100,000 sq ft · score 94 (A)
- Distribution Center buildings in Denver· 188 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 Aspen Leaf's energy grade?
Aspen Leaf scores 39 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 Aspen Leaf use?
Its 2023 site energy-use intensity was 55.1 kBtu/ft² across 108,000 sq ft, including 832,855 kWh of electricity and 31,139 therms of natural gas.
What are Aspen Leaf's carbon emissions?
Aspen Leaf reported 606 tCO₂e of greenhouse-gas emissions for 2023.
Where is Aspen Leaf?
Aspen Leaf is at 4800 Osage, in Denver, Colorado 80221.
How big is Aspen Leaf and when was it built?
Aspen Leaf has 108,000 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2003 as its year built. It is classed as distribution center.
Is Aspen Leaf 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, “Aspen Leaf, Denver, Colorado — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/denver/aspen-leaf-b7dd5e58 (data as of July 9, 2026).