Casa Monterrey Apartments
Multifamily Housing in California, CA · 6551 Warner Avenue, Huntington Beach · 92647
At a glance
Casa Monterrey Apartments is a 208,000-square-foot multifamily housing building at 6551 Warner Avenue, Huntington Beach in Huntington Beach, California, built in 1970. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 51 out of 100 (grade D), a site energy-use intensity of 41.0 kBtu/ft² and 506 tCO₂e of greenhouse-gas emissions. That score is higher than 10% 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 | 51 (band D) |
| Site EUI | 41.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 506 tCO₂e |
| GHG intensity | 2.4 kgCO₂e/ft² |
| Electricity | 685,860 kWh |
| Natural gas | 66,081 therms |
| Gross floor area | 208,000 sq ft |
| Source record | california:10512337:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 51 | +10 | 41.0 kBtu/ft² | 506 tCO₂e |
| 2023 | 41 | +10 | 45.7 kBtu/ft² | 547 tCO₂e |
| 2022 | 31 | +30 | 51.5 kBtu/ft² | 622 tCO₂e |
| 2021 | 1 | -46 | 116.3 kBtu/ft² | 1,310 tCO₂e |
| 2020 | 47 | +1 | 53.8 kBtu/ft² | 493 tCO₂e |
| 2019 | 46 | 50.7 kBtu/ft² | 506 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
- 6551 Warner Avenue, Huntington Beach
- City
- California
- State
- California
- ZIP
- 92647
- Coordinates
- 33.71683, -118.01353
Within ~1 km
Nearby benchmarked buildings
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- 6242 Warner Avenue (Wr028)score 92
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- Huntington Beachscore 53
Senior Living Community · 115,003 sq ft
- Warner Westscore —
Strip Mall · 67,764 sq ft
See also: most efficient in California · biggest emitters
How does Casa Monterrey 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. Casa Monterrey Apartments's ENERGY STAR score of 51 compares with an average of 82 across the 9,612 that report a score; it scores higher than 10% of them and lower than 89%. Its site EUI of 41.0 kBtu/ft² is about 19% 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 208,000 sq ft, it is about 38% above the average floor area of 150,919 sq ft for those buildings. It was built in 1970, 18 years earlier 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 Casa Monterrey Apartments's energy performance changed over time?
BuildingCensus holds 6 California disclosures for Casa Monterrey Apartments, covering report years 2019–2024. Its ENERGY STAR score went from 46 in 2019 to 51 in 2024 (+5 points). Site EUI moved from 50.7 kBtu/ft² (2019) to 41.0 kBtu/ft² (2024), a 19% decrease. Reported emissions went from 506 tCO₂e to 506 tCO₂e over the same span (up 0%).
What does an ENERGY STAR score of 51 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 51 means the building performs better than about 51% of its national peers. BuildingCensus bands the score into report-card grades; 51 falls in band D — lowest band (1–54). It sits 24 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. Casa Monterrey Apartments's 41.0 kBtu/ft² across 208,000 sq ft works out to about 8.5 billion Btu (2,499 MWh-equivalent) in 2024. The disclosure also reports 685,860 kWh of electricity and 66,081 therms of natural gas for the year.
Which law requires Casa Monterrey Apartments to report its energy use?
Casa Monterrey 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:10512337:2024). 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
- Rich Sorro Commons· 207,910 sq ft · score 97 (A)
- Tarzana Terraces· 207,851 sq ft · score 82 (B)
- The Exchange At Bayfront (Xc014)· 207,794 sq ft · score 99 (A)
- Citron House (Pc000)· 207,794 sq ft · score 5 (D)
- 23215 Ironwood Ave· 207,781 sq ft · score 100 (A)
- The Huxley - Essex (Hx003)(Hx004)· 207,769 sq ft · score 72 (B)
- 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 Casa Monterrey Apartments's energy grade?
Casa Monterrey Apartments scores 51 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Casa Monterrey Apartments use?
Its 2024 site energy-use intensity was 41.0 kBtu/ft² across 208,000 sq ft, including 685,860 kWh of electricity and 66,081 therms of natural gas.
What are Casa Monterrey Apartments's carbon emissions?
Casa Monterrey Apartments reported 506 tCO₂e of greenhouse-gas emissions (2.4 kgCO₂e/ft²) for 2024.
Where is Casa Monterrey Apartments?
Casa Monterrey Apartments is at 6551 Warner Avenue, Huntington Beach, in Huntington Beach, California 92647. Its coordinates are 33.71683, -118.01353 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Casa Monterrey Apartments and when was it built?
Casa Monterrey Apartments has 208,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1970 as its year built. It is classed as multifamily housing.
Is Casa Monterrey 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, “Casa Monterrey Apartments, Huntington Beach, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/casa-monterrey-apartments-7effd1ba (data as of July 9, 2026).