Ascend 2300 (Ri020)
Multifamily Housing in California, CA · 2300 Rising Glen Way, Carlsbad · 92008
At a glance
Ascend 2300 (Ri020) is a 172,062-square-foot multifamily housing building at 2300 Rising Glen Way, Carlsbad in Carlsbad, California, built in 1989. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 1 out of 100 (grade D), a site energy-use intensity of 118.0 kBtu/ft² and 1,122 tCO₂e of greenhouse-gas emissions. That score is higher than 0% 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 | 1 (band D) |
| Site EUI | 118.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,122 tCO₂e |
| GHG intensity | 6.5 kgCO₂e/ft² |
| Electricity | 947,886 kWh |
| Natural gas | 170,752 therms |
| Gross floor area | 172,062 sq ft |
| Source record | california:21853885:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 1 | -97 | 118.0 kBtu/ft² | 1,122 tCO₂e |
| 2023 | 98 | +3 | 29.9 kBtu/ft² | 312 tCO₂e |
| 2022 | 95 | ±0 | 30.7 kBtu/ft² | 332 tCO₂e |
| 2021 | 95 | 30.2 kBtu/ft² | 318 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
- 2300 Rising Glen Way, Carlsbad
- City
- California
- State
- California
- ZIP
- 92008
- Coordinates
- 33.17242, -117.32455
Within ~1 km
Nearby benchmarked buildings
- The Shoppes At Carlsbadscore —
Enclosed Mall · 1,100,000 sq ft
- Rising Glenscore —
Multifamily Housing · 170,562 sq ft
- (71545A) Carlsbad 1 Macy'S Ownedscore 90
Retail Store · 155,593 sq ft
- Carlsbad, Ca-0566score 97
Retail Store · 153,425 sq ft
- Flower Fields (Fl18)score 94
Multifamily Housing · 139,075 sq ft
- The Bluffs At Carlsbadscore 100
Multifamily Housing · 92,930 sq ft
See also: most efficient in California · biggest emitters
How does Ascend 2300 (Ri020) 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. Ascend 2300 (Ri020)'s ENERGY STAR score of 1 compares with an average of 82 across the 9,612 that report a score; it scores higher than 0% of them and lower than 99%. Its site EUI of 118.0 kBtu/ft² is about 243% 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 6.5 kgCO₂e/ft² is about 210% above the group average of 2.1 kgCO₂e/ft².
At 172,062 sq ft, it is about 14% above the average floor area of 150,919 sq ft for those buildings. Its 1989 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 Ascend 2300 (Ri020)'s energy performance changed over time?
BuildingCensus holds 4 California disclosures for Ascend 2300 (Ri020), covering report years 2021–2024. Its ENERGY STAR score went from 95 in 2021 to 1 in 2024 (-94 points); its best year on file was 2023, at 98. Site EUI moved from 30.2 kBtu/ft² (2021) to 118.0 kBtu/ft² (2024), an 291% increase. Reported emissions went from 318 tCO₂e to 1,122 tCO₂e over the same span (up 253%).
What does an ENERGY STAR score of 1 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: 1 is the bottom of the scale. BuildingCensus bands the score into report-card grades; 1 falls in band D — lowest band (1–54). It sits 74 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. Ascend 2300 (Ri020)'s 118.0 kBtu/ft² across 172,062 sq ft works out to about 20.3 billion Btu (5,950 MWh-equivalent) in 2024. The disclosure also reports 947,886 kWh of electricity and 170,752 therms of natural gas for the year.
Which law requires Ascend 2300 (Ri020) to report its energy use?
Ascend 2300 (Ri020) 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:21853885:2024). 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
- Village At Sc - Cambria #03· 172,022 sq ft · score 13 (D)
- Nantucket Creek· 172,000 sq ft · score 97 (A)
- Azure (Nt133)· 171,990 sq ft · score 73 (B)
- Amberwood· 171,921 sq ft · score 82 (B)
- Pullman Point· 171,876 sq ft · score 96 (A)
- 9423 Reseda Blvd· 171,808 sq ft · score 25 (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 Ascend 2300 (Ri020)'s energy grade?
Ascend 2300 (Ri020) scores 1 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 Ascend 2300 (Ri020) use?
Its 2024 site energy-use intensity was 118.0 kBtu/ft² across 172,062 sq ft, including 947,886 kWh of electricity and 170,752 therms of natural gas.
What are Ascend 2300 (Ri020)'s carbon emissions?
Ascend 2300 (Ri020) reported 1,122 tCO₂e of greenhouse-gas emissions (6.5 kgCO₂e/ft²) for 2024.
Where is Ascend 2300 (Ri020)?
Ascend 2300 (Ri020) is at 2300 Rising Glen Way, Carlsbad, in Carlsbad, California 92008. Its coordinates are 33.17242, -117.32455 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Ascend 2300 (Ri020) and when was it built?
Ascend 2300 (Ri020) has 172,062 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1989 as its year built. It is classed as multifamily housing.
Is Ascend 2300 (Ri020) 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, “Ascend 2300 (Ri020), Carlsbad, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/ascend-2300-ri020-5ed2591a (data as of July 9, 2026).