Round Hill Creek Apartments
Multifamily Housing in California, CA · 100 Hawthorn Drive, Fairfield · 94533
At a glance
Round Hill Creek Apartments is a 77,748-square-foot multifamily housing building at 100 Hawthorn Drive, Fairfield in Fairfield, California, built in 1986. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 94 out of 100 (grade A), a site energy-use intensity of 42.4 kBtu/ft² and 190 tCO₂e of greenhouse-gas emissions. That score is higher than 55% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 94 (band A) |
| Site EUI | 42.4 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 190 tCO₂e |
| GHG intensity | 2.4 kgCO₂e/ft² |
| Electricity | 268,247 kWh |
| Natural gas | 24,285 therms |
| Gross floor area | 77,748 sq ft |
| Source record | california:34347105:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 94 | -6 | 42.4 kBtu/ft² | 190 tCO₂e |
| 2023 | 100 | 18.2 kBtu/ft² | 85 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
- 100 Hawthorn Drive, Fairfield
- City
- California
- State
- California
- ZIP
- 94533
- Coordinates
- 38.28022, -122.03513
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Round Hill Creek Apartments 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. Round Hill Creek Apartments's ENERGY STAR score of 94 compares with an average of 82 across the 9,612 that report a score; it scores higher than 55% of them and lower than 42%. Its site EUI of 42.4 kBtu/ft² is about 23% 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 2.4 kgCO₂e/ft² is about 16% above the group average of 2.1 kgCO₂e/ft².
At 77,748 sq ft, it is about half of the average floor area of 150,919 sq ft for those buildings. Its 1986 construction date is close to 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 Round Hill Creek Apartments's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Round Hill Creek Apartments, covering report years 2023–2024. Its ENERGY STAR score went from 100 in 2023 to 94 in 2024 (-6 points); its best year on file was 2023, at 100. Site EUI moved from 18.2 kBtu/ft² (2023) to 42.4 kBtu/ft² (2024), an 133% increase. Reported emissions went from 85 tCO₂e to 190 tCO₂e over the same span (up 125%).
What does an ENERGY STAR score of 94 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 94 means the building performs better than about 94% of its national peers. BuildingCensus bands the score into report-card grades; 94 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. Round Hill Creek Apartments's 42.4 kBtu/ft² across 77,748 sq ft works out to about 3.3 billion Btu (966 MWh-equivalent) in 2024. The disclosure also reports 268,247 kWh of electricity and 24,285 therms of natural gas for the year.
Which law requires Round Hill Creek Apartments to report its energy use?
Round Hill Creek Apartments 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:34347105:2024). 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 multifamily housing buildings in California
- Wesley Tower: 201 East Verdugo Avenue· 77,731 sq ft · score 96 (A)
- Mariners Place - Essex (Mr440)· 77,727 sq ft · score 99 (A)
- Bella Vista (Bl201)· 77,708 sq ft · score 57 (C)
- 2505 W. 6Th Street - Ladbs· 77,697 sq ft · score 71 (B)
- 2505 W 6Th St - Asbury Apartments· 77,697 sq ft · score 14 (D)
- Castle Arms Apartments Llc· 77,695 sq ft · score 99 (A)
- Multifamily Housing buildings in California· 10,630 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 Round Hill Creek Apartments's energy grade?
Round Hill Creek Apartments scores 94 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 Round Hill Creek Apartments use?
Its 2024 site energy-use intensity was 42.4 kBtu/ft² across 77,748 sq ft, including 268,247 kWh of electricity and 24,285 therms of natural gas.
What are Round Hill Creek Apartments's carbon emissions?
Round Hill Creek Apartments reported 190 tCO₂e of greenhouse-gas emissions (2.4 kgCO₂e/ft²) for 2024.
Where is Round Hill Creek Apartments?
Round Hill Creek Apartments is at 100 Hawthorn Drive, Fairfield, in Fairfield, California 94533. Its coordinates are 38.28022, -122.03513 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Round Hill Creek Apartments and when was it built?
Round Hill Creek Apartments has 77,748 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1986 as its year built. It is classed as multifamily housing.
Is Round Hill Creek Apartments 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, “Round Hill Creek Apartments, Fairfield, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/round-hill-creek-apartments-913a3b22 (data as of July 9, 2026).