Inn at Union Square
Commercial in San Francisco, CA · 440 POST ST · 94102
At a glance
Inn at Union Square is a 19,170-square-foot commercial building at 440 POST ST in San Francisco, California, built in 1910. It is listed in the 2025 Existing Buildings Energy Performance Ordinance disclosure without energy figures: no ENERGY STAR score, energy use or emissions were published for it that year. Its most recent reported figures are from 2019, when it scored 90 out of 100 on ENERGY STAR with a site EUI of 38.7 kBtu/ft².
No energy data reported for 2025
Inn at Union Square appears in the 2025 Existing Buildings Energy Performance Ordinance disclosure, but no ENERGY STAR score, energy use or emissions were published for it — the building did not report benchmarking data for that year. Earlier reported years are in the table below.
Floor area on file: 19,170 sq ft · Built 1910
Source record sf:0296/007:2025
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2025latest | — | — | — | |
| 2024 | — | — | — | |
| 2023 | — | — | — | |
| 2022 | — | — | — | |
| 2021 | — | — | — | |
| 2020 | — | — | — | |
| 2019 | 90 | +16 | 38.7 kBtu/ft² | 52 tCO₂e |
| 2018 | 74 | -18 | 35.3 kBtu/ft² | 48 tCO₂e |
| 2017 | 92 | 36.5 kBtu/ft² | 49 tCO₂e | |
| 2016 | — | — | — | |
| 2015 | — | — | — | |
| 2014 | — | 40.6 kBtu/ft² | 63 tCO₂e | |
| 2013 | — | 47.2 kBtu/ft² | 74 tCO₂e | |
| 2012 | — | — | — | |
| 2011 | — | — | — |
Compliance context
SF Environment Code Chapter 20
San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 440 POST ST
- City
- San Francisco
- State
- California
- ZIP
- 94102
- Coordinates
- 37.78849, -122.40909
Within ~1 km
Nearby benchmarked buildings
- 555 Californiascore 75
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- 555 California Streetscore 76
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See also: most efficient in San Francisco · biggest emitters
How has Inn at Union Square's energy performance changed over time?
BuildingCensus holds 15 San Francisco disclosures for Inn at Union Square, covering report years 2011–2025. Its ENERGY STAR score went from 92 in 2017 to 90 in 2019 (-2 points); its best year on file was 2017, at 92. Site EUI moved from 47.2 kBtu/ft² (2013) to 38.7 kBtu/ft² (2019), a 18% decrease. Reported emissions went from 74 tCO₂e to 52 tCO₂e over the same span (down 29%).
Which law requires Inn at Union Square to report its energy use?
Inn at Union Square reports under SF Environment Code Chapter 20, the legal basis of San Francisco's Existing Buildings Energy Performance Ordinance, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2025 disclosure (source record sf:0296/007:2025). San Francisco's ordinance requires annual benchmarking for commercial buildings over 10,000 sq ft, with administrative penalties for buildings that fail to report.
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- Commercial buildings in San Francisco· 1,683 benchmarked
- All San Francisco benchmarked buildings· SF Environment Code Chapter 20
- Most efficient large buildings in San Francisco
- Least efficient large buildings in San Francisco
- Biggest emitters in San Francisco
Frequently asked questions
What is Inn at Union Square's energy grade?
Inn at Union Square has no grade: it did not report energy data for 2025. The 2025 Existing Buildings Energy Performance Ordinance disclosure lists the building but publishes no ENERGY STAR score, energy use or emissions for it.
Where is Inn at Union Square?
Inn at Union Square is at 440 POST ST, in San Francisco, California 94102. Its coordinates are 37.78849, -122.40909 (latitude, longitude), as published in the Existing Buildings Energy Performance Ordinance file.
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About this data
Source: Existing Buildings Energy Performance Ordinance (SF Environment Code Chapter 20), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Inn at Union Square, San Francisco, California — 2025 benchmarking disclosure”, https://buildingcensus.com/buildings/san-francisco/inn-at-union-square-5aeb08fe (data as of October 2, 2026).