Sage Mountain Senior Living
Senior Living Community in California, CA · 3499 Grande Vista Dr., Thousand Oaks · 91320
At a glance
Sage Mountain Senior Living is a 102,028-square-foot senior living community building at 3499 Grande Vista Dr., Thousand Oaks in Thousand Oaks, California, built in 2018. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 39.5 kBtu/ft² and 253 tCO₂e of greenhouse-gas emissions. That score is higher than 48% of the 517 scored senior living community buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 91 (band A) |
| Site EUI | 39.5 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 253 tCO₂e |
| GHG intensity | 2.5 kgCO₂e/ft² |
| Electricity | 870,629 kWh |
| Natural gas | 10,573 therms |
| Gross floor area | 102,028 sq ft |
| Source record | california:34546855:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 91 | +9 | 39.5 kBtu/ft² | 253 tCO₂e |
| 2023 | 82 | 39.4 kBtu/ft² | 267 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
- 3499 Grande Vista Dr., Thousand Oaks
- City
- California
- State
- California
- ZIP
- 91320
- Coordinates
- 34.19916, -118.95247
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Sage Mountain Senior Living compare with other senior living community buildings in California?
The latest disclosures cover 542 senior living community buildings in California, out of 40,029 buildings citywide. Sage Mountain Senior Living's ENERGY STAR score of 91 compares with an average of 81 across the 517 that report a score; it scores higher than 48% of them and lower than 50%. Its site EUI of 39.5 kBtu/ft² is about 23% below the average of 51.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.5 kgCO₂e/ft² is about 23% below the group average of 3.2 kgCO₂e/ft².
At 102,028 sq ft, it is roughly in line with the average floor area of 104,319 sq ft for those buildings. It was built in 2018, 20 years later than the group's average year built (1998). Across all 24 jurisdictions BuildingCensus covers, the 1,181 senior living community buildings average an ENERGY STAR score of 71 and a site EUI of 73.6 kBtu/ft².
How has Sage Mountain Senior Living's energy performance changed over time?
BuildingCensus holds 2 California disclosures for Sage Mountain Senior Living, covering report years 2023–2024. Its ENERGY STAR score went from 82 in 2023 to 91 in 2024 (+9 points). Site EUI moved from 39.4 kBtu/ft² (2023) to 39.5 kBtu/ft² (2024), an 0% increase. Reported emissions went from 267 tCO₂e to 253 tCO₂e over the same span (down 5%).
What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 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 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. Sage Mountain Senior Living's 39.5 kBtu/ft² across 102,028 sq ft works out to about 4 billion Btu (1,181 MWh-equivalent) in 2024. The disclosure also reports 870,629 kWh of electricity and 10,573 therms of natural gas for the year.
Which law requires Sage Mountain Senior Living to report its energy use?
Sage Mountain Senior Living 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:34546855:2024). 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 senior living community buildings in California
- Sterling Inn· 101,807 sq ft · score 98 (A)
- Country Hills Post Acute (Cn096)· 101,217 sq ft · score 88 (A)
- The Kensington At Walnut Creek· 101,180 sq ft · score 76 (B)
- 350-Ivy Park At Otay Ranch· 100,402 sq ft · score 76 (B)
- Belmont Village Sunnyvale· 100,000 sq ft · score 67 (C)
- Almavia Of San Francisco· 100,000 sq ft · score 67 (C)
- Senior Living Community buildings in California· 542 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 Sage Mountain Senior Living's energy grade?
Sage Mountain Senior Living scores 91 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Sage Mountain Senior Living use?
Its 2024 site energy-use intensity was 39.5 kBtu/ft² across 102,028 sq ft, including 870,629 kWh of electricity and 10,573 therms of natural gas.
What are Sage Mountain Senior Living's carbon emissions?
Sage Mountain Senior Living reported 253 tCO₂e of greenhouse-gas emissions (2.5 kgCO₂e/ft²) for 2024.
Where is Sage Mountain Senior Living?
Sage Mountain Senior Living is at 3499 Grande Vista Dr., Thousand Oaks, in Thousand Oaks, California 91320. Its coordinates are 34.19916, -118.95247 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Sage Mountain Senior Living and when was it built?
Sage Mountain Senior Living has 102,028 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2018 as its year built. It is classed as senior living community.
Is Sage Mountain Senior Living 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, “Sage Mountain Senior Living, Thousand Oaks, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/sage-mountain-senior-living-17906b31 (data as of July 9, 2026).