Westend Apartments (Ws292)
Multifamily Housing in Denver, CO · 3500 Rockmont Drive · 80202
At a glance
Westend Apartments (Ws292) is a 409,004-square-foot multifamily housing building at 3500 Rockmont Drive in Denver, Colorado, built in 2014. In its 2023 Denver benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 48.4 kBtu/ft² and 1,915 tCO₂e of greenhouse-gas emissions. That score is higher than 41% of the 956 scored multifamily housing buildings in Denver.
Energize Denver Building Performance Policy · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 81 (band B) |
| Site EUI | 48.4 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,915 tCO₂e |
| GHG intensity | — |
| Electricity | 2,602,816 kWh |
| Natural gas | 109,002 therms |
| Gross floor area | 409,004 sq ft |
| Source record | denver:5659:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 81 | -4 | 48.4 kBtu/ft² | 1,915 tCO₂e |
| 2022 | 85 | +6 | 45.2 kBtu/ft² | 2,053 tCO₂e |
| 2021 | 79 | 47.4 kBtu/ft² | 2,121 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
- 3500 Rockmont Drive
- City
- Denver
- State
- Colorado
- ZIP
- 80202
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 Westend Apartments (Ws292) compare with other multifamily housing buildings in Denver?
The latest disclosures cover 1,108 multifamily housing buildings in Denver, out of 3,287 buildings citywide. Westend Apartments (Ws292)'s ENERGY STAR score of 81 compares with an average of 78 across the 956 that report a score; it scores higher than 41% of them and lower than 57%. Its site EUI of 48.4 kBtu/ft² is about 15% below the average of 57.0 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 409,004 sq ft, it is about 224% above the average floor area of 126,139 sq ft for those buildings. It was built in 2014, 24 years later than the group's average year built (1990). 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 Westend Apartments (Ws292)'s energy performance changed over time?
BuildingCensus holds 3 Denver disclosures for Westend Apartments (Ws292), covering report years 2021–2023. Its ENERGY STAR score went from 79 in 2021 to 81 in 2023 (+2 points); its best year on file was 2022, at 85. Site EUI moved from 47.4 kBtu/ft² (2021) to 48.4 kBtu/ft² (2023), an 2% increase. Reported emissions went from 2,121 tCO₂e to 1,915 tCO₂e over the same span (down 10%).
What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 falls in band B — above median (70–84). 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 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. Westend Apartments (Ws292)'s 48.4 kBtu/ft² across 409,004 sq ft works out to about 19.8 billion Btu (5,802 MWh-equivalent) in 2023. The disclosure also reports 2,602,816 kWh of electricity and 109,002 therms of natural gas for the year.
Which law requires Westend Apartments (Ws292) to report its energy use?
Westend Apartments (Ws292) 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:5659:2023). 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 multifamily housing buildings in Denver
- The Cameron· 405,996 sq ft · score 100 (A)
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- Market Station· 404,443 sq ft · EUI 67.4 kBtu/ft²
- Luxe At Mile High (Lx112)· 403,740 sq ft · score 96 (A)
- Velaris Living· 403,430 sq ft · score 90 (A)
- Commons Park West· 394,447 sq ft · EUI 57.7 kBtu/ft²
- Multifamily Housing buildings in Denver· 1,108 benchmarked
- All Denver benchmarked buildings· Energize Denver Building Performance Policy
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Frequently asked questions
What is Westend Apartments (Ws292)'s energy grade?
Westend Apartments (Ws292) scores 81 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 Denver disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Westend Apartments (Ws292) use?
Its 2023 site energy-use intensity was 48.4 kBtu/ft² across 409,004 sq ft, including 2,602,816 kWh of electricity and 109,002 therms of natural gas.
What are Westend Apartments (Ws292)'s carbon emissions?
Westend Apartments (Ws292) reported 1,915 tCO₂e of greenhouse-gas emissions for 2023.
Where is Westend Apartments (Ws292)?
Westend Apartments (Ws292) is at 3500 Rockmont Drive, in Denver, Colorado 80202.
How big is Westend Apartments (Ws292) and when was it built?
Westend Apartments (Ws292) has 409,004 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2014 as its year built. It is classed as multifamily housing.
Is Westend Apartments (Ws292) 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, “Westend Apartments (Ws292), Denver, Colorado — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/denver/westend-apartments-ws292-51738a24 (data as of July 9, 2026).