BuildingCensus
D

Mosso - Essex

Multifamily Housing in California, CA · 900 Folsom St, San Francisco · 94107

At a glance

Mosso - Essex is a 180,288-square-foot multifamily housing building at 900 Folsom St, San Francisco in San Francisco, California, built in 2014. In its 2020 California benchmarking disclosure it reported an ENERGY STAR score of 50 out of 100 (grade D), a site energy-use intensity of 62.6 kBtu/ft² and 619 tCO₂e of greenhouse-gas emissions. That score is higher than 10% of the 9,612 scored multifamily housing buildings in California.

ENERGY STAR score
50
band D · 2020
Site EUI
62.6
kBtu/ft²
GHG emissions
619
tCO₂e
GHG intensity
3.4
kgCO₂e/ft²
Floor area
180,288
sq ft
Year built
2014
vintage
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85–10070–8455–691–54
This entry + 6 nearby

AB 802 (Public Resources Code §25402.10) · reporting year 2020

Benchmarking record

FieldValue
ENERGY STAR score50 (band D)
Site EUI62.6 kBtu/ft²
Source EUI—
GHG emissions619 tCO₂e
GHG intensity3.4 kgCO₂e/ft²
Electricity1,108,807 kWh
Natural gas69,347 therms
Gross floor area180,288 sq ft
Source recordcalifornia:6721408:2020

The disclosure history

Year over year

YearScoreΔSite EUIGHG emissions
2020latest50+262.6 kBtu/ft²619 tCO₂e
20194860.0 kBtu/ft²644 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.

Program details →

Ownership

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

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Location

Address
900 Folsom St, San Francisco
State
California
ZIP
94107
Coordinates
37.78020, -122.40347

Within ~1 km

Nearby benchmarked buildings

See also: most efficient in California · biggest emitters

How does Mosso - Essex compare with other multifamily housing buildings in California?

The latest disclosures cover 10,630 multifamily housing buildings in California, out of 40,029 buildings citywide. Mosso - Essex's ENERGY STAR score of 50 compares with an average of 82 across the 9,612 that report a score; it scores higher than 10% of them and lower than 90%. Its site EUI of 62.6 kBtu/ft² is about 82% above the average of 34.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 3.4 kgCO₂e/ft² is about 62% above the group average of 2.1 kgCO₂e/ft².

At 180,288 sq ft, it is about 19% above the average floor area of 150,919 sq ft for those buildings. It was built in 2014, 26 years later than the group's average year built (1988). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².

How has Mosso - Essex's energy performance changed over time?

BuildingCensus holds 2 California disclosures for Mosso - Essex, covering report years 2019–2020. Its ENERGY STAR score went from 48 in 2019 to 50 in 2020 (+2 points). Site EUI moved from 60.0 kBtu/ft² (2019) to 62.6 kBtu/ft² (2020), an 4% increase. Reported emissions went from 644 tCO₂e to 619 tCO₂e over the same span (down 4%).

What does an ENERGY STAR score of 50 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: a score of 50 means the building performs better than about 50% of its national peers. BuildingCensus bands the score into report-card grades; 50 falls in band D — lowest band (1–54). It sits 25 points below 75, the threshold for ENERGY STAR certification. 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. Mosso - Essex's 62.6 kBtu/ft² across 180,288 sq ft works out to about 11.3 billion Btu (3,308 MWh-equivalent) in 2020. The disclosure also reports 1,108,807 kWh of electricity and 69,347 therms of natural gas for the year.

Which law requires Mosso - Essex to report its energy use?

Mosso - Essex 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 2020 disclosure (source record california:6721408:2020). 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 multifamily housing buildings in California

Frequently asked questions

What is Mosso - Essex's energy grade?

Mosso - Essex scores 50 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2020 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.

How much energy does Mosso - Essex use?

Its 2020 site energy-use intensity was 62.6 kBtu/ft² across 180,288 sq ft, including 1,108,807 kWh of electricity and 69,347 therms of natural gas.

What are Mosso - Essex's carbon emissions?

Mosso - Essex reported 619 tCO₂e of greenhouse-gas emissions (3.4 kgCO₂e/ft²) for 2020.

Where is Mosso - Essex?

Mosso - Essex is at 900 Folsom St, San Francisco, in San Francisco, California 94107. Its coordinates are 37.78020, -122.40347 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.

How big is Mosso - Essex and when was it built?

Mosso - Essex has 180,288 sq ft of gross floor area, as reported in its 2020 disclosure. The disclosure lists 2014 as its year built. It is classed as multifamily housing.

Is Mosso - Essex covered by AB 802 (Public Resources Code §25402.10)?

Yes — it appears in the 2020 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, “Mosso - Essex, San Francisco, California — 2020 benchmarking disclosure”, https://buildingcensus.com/buildings/california/mosso-essex-f88a9535 (data as of July 9, 2026).