At a glance
Outdoor Systems is a 28,162-square-foot office building at 4647 Leyden St in Denver, Colorado, built in 1983. In its 2023 Denver benchmarking disclosure it reported an ENERGY STAR score of 68 out of 100 (grade C), a site energy-use intensity of 62.0 kBtu/ft² and 127 tCO₂e of greenhouse-gas emissions. That score is higher than 32% of the 339 scored office buildings in Denver.
Energize Denver Building Performance Policy · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 68 (band C) |
| Site EUI | 62.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 127 tCO₂e |
| GHG intensity | — |
| Electricity | 97,864 kWh |
| Natural gas | 14,128 therms |
| Gross floor area | 28,162 sq ft |
| Source record | denver:1467:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 68 | +11 | 62.0 kBtu/ft² | 127 tCO₂e |
| 2022 | 57 | -7 | 76.6 kBtu/ft² | 150 tCO₂e |
| 2021 | 64 | 66.7 kBtu/ft² | 139 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
- 4647 Leyden St
- City
- Denver
- State
- Colorado
- ZIP
- 80216
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 Outdoor Systems compare with other office buildings in Denver?
The latest disclosures cover 427 office buildings in Denver, out of 3,287 buildings citywide. Outdoor Systems's ENERGY STAR score of 68 compares with an average of 71 across the 339 that report a score; it scores higher than 32% of them and lower than 66%. Its site EUI of 62.0 kBtu/ft² is roughly in line with the average of 67.1 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 28,162 sq ft, it is about 82% below the average floor area of 157,927 sq ft for those buildings. It was built in 1983, 3 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 Outdoor Systems's energy performance changed over time?
BuildingCensus holds 3 Denver disclosures for Outdoor Systems, covering report years 2021–2023. Its ENERGY STAR score went from 64 in 2021 to 68 in 2023 (+4 points). Site EUI moved from 66.7 kBtu/ft² (2021) to 62.0 kBtu/ft² (2023), a 7% decrease. Reported emissions went from 139 tCO₂e to 127 tCO₂e over the same span (down 9%).
What does an ENERGY STAR score of 68 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 68 means the building performs better than about 68% of its national peers. BuildingCensus bands the score into report-card grades; 68 falls in band C — below median (55–69). It sits 7 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. Outdoor Systems's 62.0 kBtu/ft² across 28,162 sq ft works out to about 1.7 billion Btu (512 MWh-equivalent) in 2023. The disclosure also reports 97,864 kWh of electricity and 14,128 therms of natural gas for the year.
Which law requires Outdoor Systems to report its energy use?
Outdoor Systems 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:1467:2023). 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
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- Cvs 10831· 27,484 sq ft
- 155 Cook St.· 27,393 sq ft
- 5925 E Evans Avenue· 27,339 sq ft · score 19 (D)
- Gab Delaware, Llc· 27,187 sq ft · score 74 (B)
- 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 Outdoor Systems's energy grade?
Outdoor Systems scores 68 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2023 Denver disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Outdoor Systems use?
Its 2023 site energy-use intensity was 62.0 kBtu/ft² across 28,162 sq ft, including 97,864 kWh of electricity and 14,128 therms of natural gas.
What are Outdoor Systems's carbon emissions?
Outdoor Systems reported 127 tCO₂e of greenhouse-gas emissions for 2023.
Where is Outdoor Systems?
Outdoor Systems is at 4647 Leyden St, in Denver, Colorado 80216.
How big is Outdoor Systems and when was it built?
Outdoor Systems has 28,162 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1983 as its year built. It is classed as office.
Is Outdoor Systems 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, “Outdoor Systems, Denver, Colorado — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/denver/outdoor-systems-19cb273a (data as of July 9, 2026).