At a glance
3300 East 1St Avenue is a 97,770-square-foot office building in Denver, Colorado, built in 1978. In its 2023 Denver benchmarking disclosure it reported a site energy-use intensity of 64.5 kBtu/ft² and 818 tCO₂e of greenhouse-gas emissions.
Energize Denver Building Performance Policy · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 64.5 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 818 tCO₂e |
| GHG intensity | — |
| Electricity | 1,418,268 kWh |
| Natural gas | 16,955 therms |
| Gross floor area | 97,770 sq ft |
| Source record | denver:3477:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | — | 64.5 kBtu/ft² | 818 tCO₂e | |
| 2022 | 89 | +8 | 31.5 kBtu/ft² | 446 tCO₂e |
| 2021 | 81 | 35.7 kBtu/ft² | 546 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
- 3300 East 1St Avenue
- 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 3300 East 1St Avenue compare with other office buildings in Denver?
The latest disclosures cover 427 office buildings in Denver, out of 3,287 buildings citywide. Its site EUI of 64.5 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 97,770 sq ft, it is about 38% below the average floor area of 157,927 sq ft for those buildings. Its 1978 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 3300 East 1St Avenue's energy performance changed over time?
BuildingCensus holds 3 Denver disclosures for 3300 East 1St Avenue, covering report years 2021–2023. Its ENERGY STAR score went from 81 in 2021 to 89 in 2022 (+8 points). Site EUI moved from 35.7 kBtu/ft² (2021) to 64.5 kBtu/ft² (2023), an 81% increase. Reported emissions went from 546 tCO₂e to 818 tCO₂e over the same span (up 50%).
What does a site EUI of 64.5 kBtu/ft² mean?
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. 3300 East 1St Avenue's 64.5 kBtu/ft² across 97,770 sq ft works out to about 6.3 billion Btu (1,848 MWh-equivalent) in 2023. The disclosure also reports 1,418,268 kWh of electricity and 16,955 therms of natural gas for the year.
Which law requires 3300 East 1St Avenue to report its energy use?
3300 East 1St Avenue 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:3477:2023). 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
- Sugar Building 1530 16Th· 97,567 sq ft · score 65 (C)
- Sherman Center· 96,160 sq ft · score 82 (B)
- Westgold· 95,902 sq ft · score 90 (A)
- Kittredge Building· 95,710 sq ft · score 46 (D)
- American Water Works Assocation· 93,095 sq ft · score 88 (A)
- 100 Fillmore· 92,616 sq ft · score 81 (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 3300 East 1St Avenue's energy grade?
3300 East 1St Avenue did not report an ENERGY STAR score in its 2023 disclosure, but its site energy-use intensity was 64.5 kBtu/ft².
How much energy does 3300 East 1St Avenue use?
Its 2023 site energy-use intensity was 64.5 kBtu/ft² across 97,770 sq ft, including 1,418,268 kWh of electricity and 16,955 therms of natural gas.
What are 3300 East 1St Avenue's carbon emissions?
3300 East 1St Avenue reported 818 tCO₂e of greenhouse-gas emissions for 2023.
Where is 3300 East 1St Avenue?
3300 East 1St Avenue is in Denver, Colorado 80206.
How big is 3300 East 1St Avenue and when was it built?
3300 East 1St Avenue has 97,770 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1978 as its year built. It is classed as office.
Is 3300 East 1St Avenue 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, “3300 East 1St Avenue, Denver, Colorado — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/denver/3300-east-1st-avenue-14c85496 (data as of July 9, 2026).