At a glance
1St Avenue Plaza - 55 Madison Street is a 136,613-square-foot office building in Denver, Colorado, built in 1982. In its 2023 Denver benchmarking disclosure it reported an ENERGY STAR score of 80 out of 100 (grade B), a site energy-use intensity of 71.9 kBtu/ft² and 1,165 tCO₂e of greenhouse-gas emissions. That score is higher than 54% of the 339 scored office buildings in Denver.
Energize Denver Building Performance Policy · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 80 (band B) |
| Site EUI | 71.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,165 tCO₂e |
| GHG intensity | — |
| Electricity | 1,848,083 kWh |
| Natural gas | 35,216 therms |
| Gross floor area | 136,613 sq ft |
| Source record | denver:3473:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 80 | ±0 | 71.9 kBtu/ft² | 1,165 tCO₂e |
| 2022 | 80 | -6 | 72.7 kBtu/ft² | 1,168 tCO₂e |
| 2021 | 86 | 62.5 kBtu/ft² | 1,122 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
- 55 Madison Street
- City
- Denver
- State
- Colorado
- ZIP
- 80206
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 1St Avenue Plaza - 55 Madison Street compare with other office buildings in Denver?
The latest disclosures cover 427 office buildings in Denver, out of 3,287 buildings citywide. 1St Avenue Plaza - 55 Madison Street's ENERGY STAR score of 80 compares with an average of 71 across the 339 that report a score; it scores higher than 54% of them and lower than 44%. Its site EUI of 71.9 kBtu/ft² is roughly in line with the average of 67.1 kBtu/ft².
At 136,613 sq ft, it is about 13% below the average floor area of 157,927 sq ft for those buildings. Its 1982 construction date is close to 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 1St Avenue Plaza - 55 Madison Street's energy performance changed over time?
BuildingCensus holds 3 Denver disclosures for 1St Avenue Plaza - 55 Madison Street, covering report years 2021–2023. Its ENERGY STAR score went from 86 in 2021 to 80 in 2023 (-6 points); its best year on file was 2021, at 86. Site EUI moved from 62.5 kBtu/ft² (2021) to 71.9 kBtu/ft² (2023), an 15% increase. Reported emissions went from 1,122 tCO₂e to 1,165 tCO₂e over the same span (up 4%).
What does an ENERGY STAR score of 80 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 80 means the building performs better than about 80% of its national peers. BuildingCensus bands the score into report-card grades; 80 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. 1St Avenue Plaza - 55 Madison Street's 71.9 kBtu/ft² across 136,613 sq ft works out to about 9.8 billion Btu (2,879 MWh-equivalent) in 2023. The disclosure also reports 1,848,083 kWh of electricity and 35,216 therms of natural gas for the year.
Which law requires 1St Avenue Plaza - 55 Madison Street to report its energy use?
1St Avenue Plaza - 55 Madison 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:3473:2023). 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
- University Building· 136,403 sq ft · score 61 (C)
- Millennium Financial Center· 136,169 sq ft · score 55 (C)
- Colorado Club Office Building· 135,174 sq ft · score 74 (B)
- 10035 E 40Th Avenue - Bldg 1· 135,145 sq ft · score 45 (D)
- Empire Park Realty Investments Llc· 135,032 sq ft · score 68 (C)
- Empire Park Realty Investments Llc· 135,000 sq ft · score 47 (D)
- 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 1St Avenue Plaza - 55 Madison Street's energy grade?
1St Avenue Plaza - 55 Madison Street scores 80 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 1St Avenue Plaza - 55 Madison Street use?
Its 2023 site energy-use intensity was 71.9 kBtu/ft² across 136,613 sq ft, including 1,848,083 kWh of electricity and 35,216 therms of natural gas.
What are 1St Avenue Plaza - 55 Madison Street's carbon emissions?
1St Avenue Plaza - 55 Madison Street reported 1,165 tCO₂e of greenhouse-gas emissions for 2023.
Where is 1St Avenue Plaza - 55 Madison Street?
1St Avenue Plaza - 55 Madison Street is in Denver, Colorado 80206.
How big is 1St Avenue Plaza - 55 Madison Street and when was it built?
1St Avenue Plaza - 55 Madison Street has 136,613 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1982 as its year built. It is classed as office.
Is 1St Avenue Plaza - 55 Madison 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, “1St Avenue Plaza - 55 Madison Street, Denver, Colorado — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/denver/1st-avenue-plaza-55-madison-street-25730b1b (data as of July 9, 2026).