At a glance
Power House at Union Station is a 78,400-square-foot office building at 401 S 18TH ST in St. Louis, Missouri. In its 2021 St. Louis benchmarking disclosure it reported a site energy-use intensity of 78.4 kBtu/ft².
Building Energy Awareness Ordinance 70474 / BEPS 71132 · reporting year 2021
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 78.4 kBtu/ft² |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Gross floor area | 78,400 sq ft |
| Source record | st_louis:P-000166:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | — | 78.4 kBtu/ft² | — | |
| 2020 | — | 79.6 kBtu/ft² | — | |
| 2019 | — | 83.1 kBtu/ft² | — | |
| 2018 | — | 79.7 kBtu/ft² | — | |
| 2017 | — | 93.9 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
401 SOUTH 18TH STREET LLC, WOODCREST CAPITAL LLC
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 401 S 18TH ST
- 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 Power House at Union Station 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 78.4 kBtu/ft² is about 11% below the average of 88.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 78,400 sq ft, it is about 66% 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 Power House at Union Station's energy performance changed over time?
BuildingCensus holds 5 St. Louis disclosures for Power House at Union Station, covering report years 2017–2021. Site EUI moved from 93.9 kBtu/ft² (2017) to 78.4 kBtu/ft² (2021), a 17% decrease.
What does a site EUI of 78.4 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. Power House at Union Station's 78.4 kBtu/ft² across 78,400 sq ft works out to about 6.1 billion Btu (1,801 MWh-equivalent) in 2021.
Which law requires Power House at Union Station to report its energy use?
Power House at Union Station 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-000166:2021). 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
- Cupples Station I· 78,085 sq ft · EUI 36.8 kBtu/ft²
- 5.Maternity Hospital· 75,576 sq ft · EUI 101.8 kBtu/ft²
- 900 north tucker building llc· 73,950 sq ft · EUI 64.9 kBtu/ft²
- 411 Building· 72,800 sq ft · EUI 54.1 kBtu/ft²
- Fair Mercantile Center· 71,000 sq ft · EUI 18.1 kBtu/ft²
- 4625 LINDELL· 69,747 sq ft · EUI 114.6 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 Power House at Union Station's energy grade?
Power House at Union Station did not report an ENERGY STAR score in its 2021 disclosure, but its site energy-use intensity was 78.4 kBtu/ft².
How much energy does Power House at Union Station use?
Its 2021 site energy-use intensity was 78.4 kBtu/ft² across 78,400 sq ft.
What are Power House at Union Station's carbon emissions?
No greenhouse-gas emissions figure was reported for 2021.
Where is Power House at Union Station?
Power House at Union Station is at 401 S 18TH ST, in St. Louis, Missouri.
How big is Power House at Union Station and when was it built?
Power House at Union Station has 78,400 sq ft of gross floor area, as reported in its 2021 disclosure. It is classed as office.
Is Power House at Union Station 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.
Working with St. Louis 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.
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, “Power House at Union Station, St. Louis, Missouri — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/st-louis/power-house-at-union-station-d83b1769 (data as of July 9, 2026).