Twin Oaks Associcates, Llc
Office in California, CA · 277 Rancheros Dr, San Marcos · 92069
At a glance
Twin Oaks Associcates, Llc is a 51,963-square-foot office building at 277 Rancheros Dr, San Marcos in San Marcos, California, built in 2000. In its 2019 California benchmarking disclosure it reported an ENERGY STAR score of 52 out of 100 (grade D), a site energy-use intensity of 40.3 kBtu/ft² and 265 tCO₂e of greenhouse-gas emissions. That score is higher than 17% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2019
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 52 (band D) |
| Site EUI | 40.3 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 265 tCO₂e |
| GHG intensity | 5.1 kgCO₂e/ft² |
| Electricity | 606,896 kWh |
| Natural gas | 433 therms |
| Gross floor area | 51,963 sq ft |
| Source record | california:3011912:2019 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2019latest | 52 | +4 | 40.3 kBtu/ft² | 265 tCO₂e |
| 2018 | 48 | 42.0 kBtu/ft² | 291 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 277 Rancheros Dr, San Marcos
- City
- California
- State
- California
- ZIP
- 92069
- Coordinates
- 33.13831, -117.16066
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Twin Oaks Associcates, Llc compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. Twin Oaks Associcates, Llc's ENERGY STAR score of 52 compares with an average of 75 across the 4,912 that report a score; it scores higher than 17% of them and lower than 83%. Its site EUI of 40.3 kBtu/ft² is about 29% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 5.1 kgCO₂e/ft² is about 41% above the group average of 3.6 kgCO₂e/ft².
At 51,963 sq ft, it is about 66% below the average floor area of 151,937 sq ft for those buildings. It was built in 2000, 15 years later 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 Twin Oaks Associcates, Llc's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Twin Oaks Associcates, Llc, covering report years 2018–2019. Its ENERGY STAR score went from 48 in 2018 to 52 in 2019 (+4 points). Site EUI moved from 42.0 kBtu/ft² (2018) to 40.3 kBtu/ft² (2019), a 4% decrease. Reported emissions went from 291 tCO₂e to 265 tCO₂e over the same span (down 9%).
What does an ENERGY STAR score of 52 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 52 means the building performs better than about 52% of its national peers. BuildingCensus bands the score into report-card grades; 52 falls in band D — lowest band (1–54). It sits 23 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. Twin Oaks Associcates, Llc's 40.3 kBtu/ft² across 51,963 sq ft works out to about 2.1 billion Btu (614 MWh-equivalent) in 2019. The disclosure also reports 606,896 kWh of electricity and 433 therms of natural gas for the year.
Which law requires Twin Oaks Associcates, Llc to report its energy use?
Twin Oaks Associcates, Llc 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 2019 disclosure (source record california:3011912:2019). 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
- Sce - Chino Sub - Office Bldg· 51,946 sq ft · score 57 (C)
- Laguna Hills Civic Center· 51,943 sq ft · score 53 (D)
- Levitt Properties· 51,928 sq ft · score 23 (D)
- 7633 Southfront Road· 51,910 sq ft · score 34 (D)
- 3055 Research Dr· 51,890 sq ft · score 100 (A)
- S&R Partners, Llc· 51,887 sq ft · EUI 25.2 kBtu/ft²
- 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 Twin Oaks Associcates, Llc's energy grade?
Twin Oaks Associcates, Llc scores 52 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2019 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Twin Oaks Associcates, Llc use?
Its 2019 site energy-use intensity was 40.3 kBtu/ft² across 51,963 sq ft, including 606,896 kWh of electricity and 433 therms of natural gas.
What are Twin Oaks Associcates, Llc's carbon emissions?
Twin Oaks Associcates, Llc reported 265 tCO₂e of greenhouse-gas emissions (5.1 kgCO₂e/ft²) for 2019.
Where is Twin Oaks Associcates, Llc?
Twin Oaks Associcates, Llc is at 277 Rancheros Dr, San Marcos, in San Marcos, California 92069. Its coordinates are 33.13831, -117.16066 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Twin Oaks Associcates, Llc and when was it built?
Twin Oaks Associcates, Llc has 51,963 sq ft of gross floor area, as reported in its 2019 disclosure. The disclosure lists 2000 as its year built. It is classed as office.
Is Twin Oaks Associcates, Llc covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2019 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, “Twin Oaks Associcates, Llc, San Marcos, California — 2019 benchmarking disclosure”, https://buildingcensus.com/buildings/california/twin-oaks-associcates-llc-4db81b95 (data as of July 9, 2026).