At a glance
Phase3 - 1155 Island is a 203,596-square-foot office building at 1155 Island Avenue in San Diego, California, built in 2011. In its 2022 San Diego benchmarking disclosure it reported an ENERGY STAR score of 97 out of 100 (grade A) and a site energy-use intensity of 29.2 kBtu/ft². That score is higher than 87% of the 259 scored office buildings in San Diego.
Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12) · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 97 (band A) |
| Site EUI | 29.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Gross floor area | 203,596 sq ft |
| Source record | san_diego:100924:2022 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2022latest | 97 | -3 | 29.2 kBtu/ft² | — |
| 2021 | 100 | 6.9 kBtu/ft² | — |
Compliance context
Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12)
San Diego's ordinance requires annual benchmarking for commercial buildings over 50,000 sq ft, with civil penalties for buildings that fail to report.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 1155 Island Avenue
- City
- San Diego
- State
- California
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in San Diego · biggest emitters
How does Phase3 - 1155 Island compare with other office buildings in San Diego?
The latest disclosures cover 356 office buildings in San Diego, out of 2,567 buildings citywide. Phase3 - 1155 Island's ENERGY STAR score of 97 compares with an average of 75 across the 259 that report a score; it scores higher than 87% of them and lower than 12%. Its site EUI of 29.2 kBtu/ft² is about half of the average of 54.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 203,596 sq ft, it is about 55% above the average floor area of 130,949 sq ft for those buildings. It was built in 2011, 20 years later than the group's average year built (1991). 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 Phase3 - 1155 Island's energy performance changed over time?
BuildingCensus holds 2 San Diego disclosures for Phase3 - 1155 Island, covering report years 2021–2022. Its ENERGY STAR score went from 100 in 2021 to 97 in 2022 (-3 points); its best year on file was 2021, at 100. Site EUI moved from 6.9 kBtu/ft² (2021) to 29.2 kBtu/ft² (2022), an 323% increase.
What does an ENERGY STAR score of 97 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 97 means the building performs better than about 97% of its national peers. BuildingCensus bands the score into report-card grades; 97 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 San Diego, 73% 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. Phase3 - 1155 Island's 29.2 kBtu/ft² across 203,596 sq ft works out to about 5.9 billion Btu (1,742 MWh-equivalent) in 2022.
Which law requires Phase3 - 1155 Island to report its energy use?
Phase3 - 1155 Island reports under the Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12), the legal basis of San Diego's Building Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2022 disclosure (source record san_diego:100924:2022). San Diego's ordinance requires annual benchmarking for commercial buildings over 50,000 sq ft, with civil penalties for buildings that fail to report.
More office buildings in San Diego
- La Jolla Gateway Two· 200,870 sq ft · score 94 (A)
- 707 Broadway· 200,343 sq ft · score 84 (B)
- Regents Square I· 200,052 sq ft · score 84 (B)
- Rio San Diego Plaza· 197,494 sq ft · score 73 (B)
- RB03 - Rancho Bernardo 3 (Previously SND11)· 196,734 sq ft
- 12830 El Camino Real - One Paseo (Building II)· 195,444 sq ft · score 91 (A)
- Office buildings in San Diego· 356 benchmarked
- All San Diego benchmarked buildings· Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12)
- Most efficient large buildings in San Diego
- Least efficient large buildings in San Diego
- Biggest emitters in San Diego
Frequently asked questions
What is Phase3 - 1155 Island's energy grade?
Phase3 - 1155 Island scores 97 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2022 San Diego disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Phase3 - 1155 Island use?
Its 2022 site energy-use intensity was 29.2 kBtu/ft² across 203,596 sq ft.
What are Phase3 - 1155 Island's carbon emissions?
No greenhouse-gas emissions figure was reported for 2022.
Where is Phase3 - 1155 Island?
Phase3 - 1155 Island is at 1155 Island Avenue, in San Diego, California.
How big is Phase3 - 1155 Island and when was it built?
Phase3 - 1155 Island has 203,596 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 2011 as its year built. It is classed as office.
Is Phase3 - 1155 Island covered by the Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12)?
Yes — it appears in the 2022 Building Energy Benchmarking disclosure, which lists the buildings reporting under the Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12).
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About this data
Source: Building Energy Benchmarking (Building Energy Benchmarking Ordinance (SDMC Ch. 14 Art. 12)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Phase3 - 1155 Island, San Diego, California — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/san-diego/phase3-1155-island-06b9893c (data as of July 9, 2026).