BuildingCensus
D

1221 S. Clarkson St

Office in Denver, CO · 80210

ENERGY STAR score
34
band D · 2023
Site EUI
121.5
kBtu/ft²
GHG emissions
305
tCO₂e
GHG intensity
—
kgCO₂e/ft²
Floor area
31,333
sq ft
Year built
1974
vintage

Energize Denver Building Performance Policy · reporting year 2023

Benchmarking record

FieldValue
ENERGY STAR score34 (band D)
Site EUI121.5 kBtu/ft²
Source EUI—
GHG emissions305 tCO₂e
GHG intensity—
Electricity294,117 kWh
Natural gas28,035 therms
Gross floor area31,333 sq ft
Source recorddenver:3646:2023

The disclosure history

Year over year

YearScoreΔSite EUIGHG emissions
2023latest34-3121.5 kBtu/ft²305 tCO₂e
202237+2103.8 kBtu/ft²301 tCO₂e
202135109.4 kBtu/ft²319 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.

Program details →

Ownership

No owning organisation shown. Names of private individuals in the disclosure are not published here.

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Location

Address
1221 S. Clarkson St
City
Denver
State
Colorado
ZIP
80210

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

Frequently asked questions

What is 1221 S. Clarkson St's energy grade?

1221 S. Clarkson St scores 34 out of 100 on ENERGY STAR — band D (Lowest band (1–54)) — in its 2023 Denver disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.

How much energy does 1221 S. Clarkson St use?

Its 2023 site energy-use intensity was 121.5 kBtu/ft² across 31,333 sq ft, including 294,117 kWh of electricity and 28,035 therms of natural gas.

What are 1221 S. Clarkson St's carbon emissions?

1221 S. Clarkson St reported 305 tCO₂e of greenhouse-gas emissions for 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.

Working with Denver building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.

Dataset updated . Source: Energize Denver Benchmarking disclosure, record denver:3646:2023.