Old Town Plaza
Office in California, CA · 2251 San Diego Ave, San Diego · 92110
At a glance
Old Town Plaza is a 65,679-square-foot office building at 2251 San Diego Ave, San Diego in San Diego, California, built in 1974. In its 2021 California benchmarking disclosure it reported an ENERGY STAR score of 71 out of 100 (grade B), a site energy-use intensity of 59.3 kBtu/ft² and 236 tCO₂e of greenhouse-gas emissions. That score is higher than 31% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2021
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 71 (band B) |
| Site EUI | 59.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 236 tCO₂e |
| GHG intensity | 3.6 kgCO₂e/ft² |
| Electricity | 609,282 kWh |
| Natural gas | 17,659 therms |
| Gross floor area | 65,679 sq ft |
| Source record | california:6387409:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | 71 | -3 | 59.3 kBtu/ft² | 236 tCO₂e |
| 2020 | 74 | 55.6 kBtu/ft² | 213 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
- 2251 San Diego Ave, San Diego
- City
- California
- State
- California
- ZIP
- 92110
- Coordinates
- 32.74842, -117.19175
Within ~1 km
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How does Old Town Plaza compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Old Town Plaza's ENERGY STAR score of 71 compares with an average of 75 across the 4,912 that report a score; it scores higher than 31% of them and lower than 68%. Its site EUI of 59.3 kBtu/ft² is roughly in line with the average of 56.4 kBtu/ft². Its emissions intensity of 3.6 kgCO₂e/ft² is roughly in line with the group average of 3.6 kgCO₂e/ft².
At 65,679 sq ft, it is about 57% below the average floor area of 151,937 sq ft for those buildings. It was built in 1974, 11 years earlier than the group's average year built (1985). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has Old Town Plaza's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Old Town Plaza, covering report years 2020–2021. Its ENERGY STAR score went from 74 in 2020 to 71 in 2021 (-3 points); its best year on file was 2020, at 74. Site EUI moved from 55.6 kBtu/ft² (2020) to 59.3 kBtu/ft² (2021), an 7% increase. Reported emissions went from 213 tCO₂e to 236 tCO₂e over the same span (up 11%).
What does an ENERGY STAR score of 71 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 71 means the building performs better than about 71% of its national peers. BuildingCensus bands the score into report-card grades; 71 falls in band B — above median (70–84). It sits 4 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. Old Town Plaza's 59.3 kBtu/ft² across 65,679 sq ft works out to about 3.9 billion Btu (1,141 MWh-equivalent) in 2021. The disclosure also reports 609,282 kWh of electricity and 17,659 therms of natural gas for the year.
Which law requires Old Town Plaza to report its energy use?
Old Town Plaza 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:6387409:2021). 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 office buildings in California
- 15231 Avenue Of Science· 65,638 sq ft · score 75 (B)
- Central Valley Regional Center· 65,616 sq ft · score 97 (A)
- Dixon Landing Business Park (409-431)· 65,592 sq ft · EUI 54.1 kBtu/ft²
- 6251 Katella Ave (Warland)· 65,567 sq ft · score 85 (A)
- Carlsbad W6· 65,566 sq ft · score 77 (B)
- Carlsbad W6· 65,566 sq ft · score 92 (A)
- Office buildings in California· 6,214 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 Old Town Plaza's energy grade?
Old Town Plaza scores 71 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2021 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Old Town Plaza use?
Its 2021 site energy-use intensity was 59.3 kBtu/ft² across 65,679 sq ft, including 609,282 kWh of electricity and 17,659 therms of natural gas.
What are Old Town Plaza's carbon emissions?
Old Town Plaza reported 236 tCO₂e of greenhouse-gas emissions (3.6 kgCO₂e/ft²) for 2021.
Where is Old Town Plaza?
Old Town Plaza is at 2251 San Diego Ave, San Diego, in San Diego, California 92110. Its coordinates are 32.74842, -117.19175 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Old Town Plaza and when was it built?
Old Town Plaza has 65,679 sq ft of gross floor area, as reported in its 2021 disclosure. The disclosure lists 1974 as its year built. It is classed as office.
Is Old Town Plaza 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, “Old Town Plaza, San Diego, California — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/california/old-town-plaza-2628c322 (data as of July 9, 2026).