At a glance
9047: 1553 Platte Street: Zang Building is a 49,921-square-foot office building at 1553 Platte St. in Denver, Colorado, built in 1898. In its 2023 Denver benchmarking disclosure it reported an ENERGY STAR score of 62 out of 100 (grade C), a site energy-use intensity of 65.2 kBtu/ft² and 308 tCO₂e of greenhouse-gas emissions. That score is higher than 24% of the 339 scored office buildings in Denver.
Energize Denver Building Performance Policy · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 62 (band C) |
| Site EUI | 65.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 308 tCO₂e |
| GHG intensity | — |
| Electricity | 407,838 kWh |
| Natural gas | 18,622 therms |
| Gross floor area | 49,921 sq ft |
| Source record | denver:5216:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 62 | +34 | 65.2 kBtu/ft² | 308 tCO₂e |
| 2022 | 28 | ±0 | 118.6 kBtu/ft² | 477 tCO₂e |
| 2021 | 28 | 103.3 kBtu/ft² | 510 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
- 1553 Platte St.
- 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 9047: 1553 Platte Street: Zang Building compare with other office buildings in Denver?
The latest disclosures cover 427 office buildings in Denver, out of 3,287 buildings citywide. 9047: 1553 Platte Street: Zang Building's ENERGY STAR score of 62 compares with an average of 71 across the 339 that report a score; it scores higher than 24% of them and lower than 75%. Its site EUI of 65.2 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 49,921 sq ft, it is about 68% below the average floor area of 157,927 sq ft for those buildings. It was built in 1898, 82 years earlier 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 9047: 1553 Platte Street: Zang Building's energy performance changed over time?
BuildingCensus holds 3 Denver disclosures for 9047: 1553 Platte Street: Zang Building, covering report years 2021–2023. Its ENERGY STAR score went from 28 in 2021 to 62 in 2023 (+34 points). Site EUI moved from 103.3 kBtu/ft² (2021) to 65.2 kBtu/ft² (2023), a 37% decrease. Reported emissions went from 510 tCO₂e to 308 tCO₂e over the same span (down 40%).
What does an ENERGY STAR score of 62 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 62 means the building performs better than about 62% of its national peers. BuildingCensus bands the score into report-card grades; 62 falls in band C — below median (55–69). It sits 13 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. 9047: 1553 Platte Street: Zang Building's 65.2 kBtu/ft² across 49,921 sq ft works out to about 3.3 billion Btu (954 MWh-equivalent) in 2023. The disclosure also reports 407,838 kWh of electricity and 18,622 therms of natural gas for the year.
Which law requires 9047: 1553 Platte Street: Zang Building to report its energy use?
9047: 1553 Platte Street: Zang Building 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:5216:2023). 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
- Dahlia· 49,580 sq ft · score 60 (C)
- 12055 East 49Th Ave/4955 Peoria - 11520· 49,575 sq ft · EUI 48.9 kBtu/ft²
- 2401 W 15Th St. (Yardi Api)· 49,401 sq ft · score 26 (D)
- Administrative Office Building· 48,772 sq ft · score 98 (A)
- Arie P. Taylor Municipal Center· 48,614 sq ft · score 54 (D)
- 1115 Acoma· 48,000 sq ft · score 27 (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 9047: 1553 Platte Street: Zang Building's energy grade?
9047: 1553 Platte Street: Zang Building scores 62 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 9047: 1553 Platte Street: Zang Building use?
Its 2023 site energy-use intensity was 65.2 kBtu/ft² across 49,921 sq ft, including 407,838 kWh of electricity and 18,622 therms of natural gas.
What are 9047: 1553 Platte Street: Zang Building's carbon emissions?
9047: 1553 Platte Street: Zang Building reported 308 tCO₂e of greenhouse-gas emissions for 2023.
Where is 9047: 1553 Platte Street: Zang Building?
9047: 1553 Platte Street: Zang Building is at 1553 Platte St., in Denver, Colorado 80202.
How big is 9047: 1553 Platte Street: Zang Building and when was it built?
9047: 1553 Platte Street: Zang Building has 49,921 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1898 as its year built. It is classed as office.
Is 9047: 1553 Platte Street: Zang Building 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, “9047: 1553 Platte Street: Zang Building, Denver, Colorado — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/denver/9047-1553-platte-street-zang-building-ddab2bde (data as of July 9, 2026).