Flood Building
Office in California, CA · 870 Market Street, San Francisco · 94102
At a glance
Flood Building is a 293,837-square-foot office building at 870 Market Street, San Francisco in San Francisco, California, built in 1904. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 15.9 kBtu/ft² and 323 tCO₂e of greenhouse-gas emissions. That score is higher than 91% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 15.9 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 323 tCO₂e |
| GHG intensity | 1.1 kgCO₂e/ft² |
| Electricity | 413,225 kWh |
| Gross floor area | 293,837 sq ft |
| Source record | california:2871968:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | ±0 | 15.9 kBtu/ft² | 323 tCO₂e |
| 2023 | 100 | ±0 | 16.7 kBtu/ft² | 329 tCO₂e |
| 2022 | 100 | ±0 | 14.4 kBtu/ft² | 294 tCO₂e |
| 2021 | 100 | ±0 | 15.8 kBtu/ft² | 293 tCO₂e |
| 2020 | 100 | ±0 | 14.0 kBtu/ft² | 262 tCO₂e |
| 2019 | 100 | ±0 | 16.5 kBtu/ft² | 327 tCO₂e |
| 2018 | 100 | 17.6 kBtu/ft² | 338 tCO₂e |
Compliance context
AB 802 (Public Resources Code §25402.10)
AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 870 Market Street, San Francisco
- City
- California
- State
- California
- ZIP
- 94102
- Coordinates
- 37.78505, -122.40713
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Flood Building compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Flood Building's ENERGY STAR score of 100 compares with an average of 75 across the 4,912 that report a score; it scores higher than 91% of them. Its site EUI of 15.9 kBtu/ft² is about 72% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 1.1 kgCO₂e/ft² is about 69% below the group average of 3.6 kgCO₂e/ft².
At 293,837 sq ft, it is about twice the average floor area of 151,937 sq ft for those buildings. It was built in 1904, 81 years earlier than the group's average year built (1985). 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 Flood Building's energy performance changed over time?
BuildingCensus holds 7 California disclosures for Flood Building, covering report years 2018–2024. Its ENERGY STAR score was 100 in both 2018 and 2024. Site EUI moved from 17.6 kBtu/ft² (2018) to 15.9 kBtu/ft² (2024), a 10% decrease. Reported emissions went from 338 tCO₂e to 323 tCO₂e over the same span (down 4%).
What does an ENERGY STAR score of 100 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In California, 65% of scored buildings are at 75 or above.
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. Flood Building's 15.9 kBtu/ft² across 293,837 sq ft works out to about 4.7 billion Btu (1,369 MWh-equivalent) in 2024. The disclosure also reports 413,225 kWh of electricity for the year.
Which law requires Flood Building to report its energy use?
Flood Building reports under AB 802 (Public Resources Code §25402.10), the legal basis of California's Building Energy Benchmarking Program (statewide), which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record california:2871968:2024). AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
More office buildings in California
- B303· 293,752 sq ft · score 59 (C)
- Sunroad Centrum· 293,675 sq ft · score 85 (A)
- 011 Bateson Building· 293,516 sq ft · score 100 (A)
- 633 Folsom Street· 293,417 sq ft · score 88 (A)
- Tower, 333 Continental Boulevard, El Segundo· 293,163 sq ft · EUI 43.7 kBtu/ft²
- Ppf Off 75 N. Fair Oaks Ave, Lp· 293,109 sq ft · score 93 (A)
- Office buildings in California· 6,214 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
- Most efficient large buildings in California
- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is Flood Building's energy grade?
Flood Building scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Flood Building use?
Its 2024 site energy-use intensity was 15.9 kBtu/ft² across 293,837 sq ft, including 413,225 kWh of electricity.
What are Flood Building's carbon emissions?
Flood Building reported 323 tCO₂e of greenhouse-gas emissions (1.1 kgCO₂e/ft²) for 2024.
Where is Flood Building?
Flood Building is at 870 Market Street, San Francisco, in San Francisco, California 94102. Its coordinates are 37.78505, -122.40713 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Flood Building and when was it built?
Flood Building has 293,837 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1904 as its year built. It is classed as office.
Is Flood Building covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2024 Building Energy Benchmarking Program (statewide) disclosure, which lists the buildings reporting under AB 802 (Public Resources Code §25402.10).
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About this data
Source: Building Energy Benchmarking Program (statewide) (AB 802 (Public Resources Code §25402.10)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Flood Building, San Francisco, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/flood-building-a6224cd1 (data as of July 9, 2026).