At a glance
4220 Duncan is a 182,068-square-foot office building at 4220 DUNCAN AVE in St. Louis, Missouri. In its 2021 St. Louis benchmarking disclosure it reported a site energy-use intensity of 59.2 kBtu/ft².
Building Energy Awareness Ordinance 70474 / BEPS 71132 · reporting year 2021
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 59.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Gross floor area | 182,068 sq ft |
| Source record | st_louis:P-001212:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | — | 59.2 kBtu/ft² | — | |
| 2020 | — | 68.7 kBtu/ft² | — |
Compliance context
Building Energy Awareness Ordinance 70474 / BEPS 71132
St. Louis's Building Energy Performance Standard (Ordinance 71132) requires buildings of 50,000 sq ft or more to meet energy-use targets, with standards set on four-year cycles.
Ownership
4220 DUNCAN LLC . ALTUS GROUP VENTAS #6775
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Location
- Address
- 4220 DUNCAN AVE
- City
- St. Louis
- State
- Missouri
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in St. Louis · biggest emitters
How does 4220 Duncan compare with other office buildings in St. Louis?
The latest disclosures cover 86 office buildings in St. Louis, out of 639 buildings citywide. Its site EUI of 59.2 kBtu/ft² is about 33% below the average of 88.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 182,068 sq ft, it is about 21% below the average floor area of 229,954 sq ft for those buildings. 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 4220 Duncan's energy performance changed over time?
BuildingCensus holds 2 St. Louis disclosures for 4220 Duncan, covering report years 2020–2021. Site EUI moved from 68.7 kBtu/ft² (2020) to 59.2 kBtu/ft² (2021), a 14% decrease.
What does a site EUI of 59.2 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. 4220 Duncan's 59.2 kBtu/ft² across 182,068 sq ft works out to about 10.8 billion Btu (3,159 MWh-equivalent) in 2021.
Which law requires 4220 Duncan to report its energy use?
4220 Duncan reports under the Building Energy Awareness Ordinance 70474 / BEPS 71132, the legal basis of St. Louis's Building Energy Awareness Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2021 disclosure (source record st_louis:P-001212:2021). St. Louis's Building Energy Performance Standard (Ordinance 71132) requires buildings of 50,000 sq ft or more to meet energy-use targets, with standards set on four-year cycles.
More office buildings in St. Louis
- CORTEX at 4320 Forest Park· 177,070 sq ft · EUI 131.1 kBtu/ft²
- The Lammert Building· 160,000 sq ft · EUI 111.0 kBtu/ft²
- Blanke Building· 158,921 sq ft · EUI 37.7 kBtu/ft²
- Laclede· 158,133 sq ft · EUI 337.4 kBtu/ft²
- Highlands Plaza One· 150,947 sq ft · EUI 64.3 kBtu/ft²
- 2300 Locust Street· 149,472 sq ft · EUI 37.0 kBtu/ft²
- Office buildings in St. Louis· 86 benchmarked
- All St. Louis benchmarked buildings· Building Energy Awareness Ordinance 70474 / BEPS 71132
- Most efficient large buildings in St. Louis
- Least efficient large buildings in St. Louis
- Biggest emitters in St. Louis
Frequently asked questions
What is 4220 Duncan's energy grade?
4220 Duncan did not report an ENERGY STAR score in its 2021 disclosure, but its site energy-use intensity was 59.2 kBtu/ft².
How much energy does 4220 Duncan use?
Its 2021 site energy-use intensity was 59.2 kBtu/ft² across 182,068 sq ft.
What are 4220 Duncan's carbon emissions?
No greenhouse-gas emissions figure was reported for 2021.
Where is 4220 Duncan?
4220 Duncan is at 4220 DUNCAN AVE, in St. Louis, Missouri.
How big is 4220 Duncan and when was it built?
4220 Duncan has 182,068 sq ft of gross floor area, as reported in its 2021 disclosure. It is classed as office.
Is 4220 Duncan covered by the Building Energy Awareness Ordinance 70474 / BEPS 71132?
Yes — it appears in the 2021 Building Energy Awareness Benchmarking disclosure, which lists the buildings reporting under the Building Energy Awareness Ordinance 70474 / BEPS 71132.
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About this data
Source: Building Energy Awareness Benchmarking (Building Energy Awareness Ordinance 70474 / BEPS 71132), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “4220 Duncan, St. Louis, Missouri — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/st-louis/4220-duncan-9b98df70 (data as of July 9, 2026).