Fountainglen Rancho Santa Margarita
Multifamily Housing in California, CA · 30751 El Corazon, Ranchosantamargarita · 92688
At a glance
Fountainglen Rancho Santa Margarita is a 135,320-square-foot multifamily housing building at 30751 El Corazon, Ranchosantamargarita in Ranchosantamargarita, California, built in 1998. In its 2021 California benchmarking disclosure it reported an ENERGY STAR score of 33 out of 100 (grade D), a site energy-use intensity of 49.2 kBtu/ft² and 370 tCO₂e of greenhouse-gas emissions. That score is higher than 6% of the 9,612 scored multifamily housing buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2021
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 33 (band D) |
| Site EUI | 49.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 370 tCO₂e |
| GHG intensity | 2.7 kgCO₂e/ft² |
| Electricity | 777,773 kWh |
| Natural gas | 39,459 therms |
| Gross floor area | 135,320 sq ft |
| Source record | california:3883959:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | 33 | ±0 | 49.2 kBtu/ft² | 370 tCO₂e |
| 2019 | 33 | 48.8 kBtu/ft² | 396 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
- 30751 El Corazon, Ranchosantamargarita
- City
- California
- State
- California
- ZIP
- 92688
- Coordinates
- 33.63824, -117.59601
Within ~1 km
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How does Fountainglen Rancho Santa Margarita 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. Fountainglen Rancho Santa Margarita's ENERGY STAR score of 33 compares with an average of 82 across the 9,612 that report a score; it scores higher than 6% of them and lower than 94%. Its site EUI of 49.2 kBtu/ft² is about 43% 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 2.7 kgCO₂e/ft² is about 29% above the group average of 2.1 kgCO₂e/ft².
At 135,320 sq ft, it is about 10% below the average floor area of 150,919 sq ft for those buildings. It was built in 1998, 10 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 Fountainglen Rancho Santa Margarita's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Fountainglen Rancho Santa Margarita, covering report years 2019, 2021. Its ENERGY STAR score was 33 in both 2019 and 2021. Site EUI moved from 48.8 kBtu/ft² (2019) to 49.2 kBtu/ft² (2021), an 1% increase. Reported emissions went from 396 tCO₂e to 370 tCO₂e over the same span (down 7%).
What does an ENERGY STAR score of 33 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 33 means the building performs better than about 33% of its national peers. BuildingCensus bands the score into report-card grades; 33 falls in band D — lowest band (1–54). It sits 42 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. Fountainglen Rancho Santa Margarita's 49.2 kBtu/ft² across 135,320 sq ft works out to about 6.7 billion Btu (1,951 MWh-equivalent) in 2021. The disclosure also reports 777,773 kWh of electricity and 39,459 therms of natural gas for the year.
Which law requires Fountainglen Rancho Santa Margarita to report its energy use?
Fountainglen Rancho Santa Margarita 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 2021 disclosure (source record california:3883959:2021). 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
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- Jkl Orchard Park Apartments Dba Orchard Park Apartments· 135,071 sq ft
- 4494 Mary Lynn Lane· 135,053 sq ft · score 48 (D)
- 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 Fountainglen Rancho Santa Margarita's energy grade?
Fountainglen Rancho Santa Margarita scores 33 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2021 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Fountainglen Rancho Santa Margarita use?
Its 2021 site energy-use intensity was 49.2 kBtu/ft² across 135,320 sq ft, including 777,773 kWh of electricity and 39,459 therms of natural gas.
What are Fountainglen Rancho Santa Margarita's carbon emissions?
Fountainglen Rancho Santa Margarita reported 370 tCO₂e of greenhouse-gas emissions (2.7 kgCO₂e/ft²) for 2021.
Where is Fountainglen Rancho Santa Margarita?
Fountainglen Rancho Santa Margarita is at 30751 El Corazon, Ranchosantamargarita, in Ranchosantamargarita, California 92688. Its coordinates are 33.63824, -117.59601 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Fountainglen Rancho Santa Margarita and when was it built?
Fountainglen Rancho Santa Margarita has 135,320 sq ft of gross floor area, as reported in its 2021 disclosure. The disclosure lists 1998 as its year built. It is classed as multifamily housing.
Is Fountainglen Rancho Santa Margarita covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2021 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, “Fountainglen Rancho Santa Margarita, Ranchosantamargarita, California — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/california/fountainglen-rancho-santa-margarita-b5b34d31 (data as of July 9, 2026).