Castro Elementary
K-12 School in Denver, CO · 845 South Lowell Boulevard · 80219
At a glance
Castro Elementary is a 73,065-square-foot K-12 school at 845 South Lowell Boulevard in Denver, Colorado, built in 1993. In its 2023 Denver benchmarking disclosure it reported an ENERGY STAR score of 32 out of 100 (grade D), a site energy-use intensity of 69.6 kBtu/ft² and 466 tCO₂e of greenhouse-gas emissions. That score is higher than 16% of the 189 scored K-12 school buildings in Denver.
Energize Denver Building Performance Policy · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 32 (band D) |
| Site EUI | 69.6 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 466 tCO₂e |
| GHG intensity | — |
| Electricity | 566,092 kWh |
| Natural gas | 31,300 therms |
| Gross floor area | 73,065 sq ft |
| Source record | denver:3607:2023 |
Compliance context
Energize Denver Building Performance Policy
Energize Denver sets energy-use (EUI) targets for buildings of 25,000+ sq ft — for most buildings an interim target in 2028 and a final target in 2032 — with civil penalties of roughly $0.15–0.35 per kBtu over target for non-compliance.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 845 South Lowell Boulevard
- City
- Denver
- State
- Colorado
- ZIP
- 80219
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in Denver · biggest emitters
How does Castro Elementary compare with other K-12 school buildings in Denver?
The latest disclosures cover 192 K-12 school buildings in Denver, out of 3,287 buildings citywide. Castro Elementary's ENERGY STAR score of 32 compares with an average of 58 across the 189 that report a score; it scores higher than 16% of them and lower than 84%. Its site EUI of 69.6 kBtu/ft² is about 11% above the average of 62.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 73,065 sq ft, it is about 21% below the average floor area of 92,016 sq ft for those buildings. It was built in 1993, 27 years later than the group's average year built (1966). Across all 24 jurisdictions BuildingCensus covers, the 6,548 K-12 school buildings average an ENERGY STAR score of 64 and a site EUI of 52.7 kBtu/ft².
What does an ENERGY STAR score of 32 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 32 means the building performs better than about 32% of its national peers. BuildingCensus bands the score into report-card grades; 32 falls in band D — lowest band (1–54). It sits 43 points below 75, the threshold for ENERGY STAR certification. In Denver, 54% 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. Castro Elementary's 69.6 kBtu/ft² across 73,065 sq ft works out to about 5.1 billion Btu (1,490 MWh-equivalent) in 2023. The disclosure also reports 566,092 kWh of electricity and 31,300 therms of natural gas for the year.
Which law requires Castro Elementary to report its energy use?
Castro Elementary reports under the Energize Denver Building Performance Policy, the legal basis of Denver's Energize Denver Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2023 disclosure (source record denver:3607:2023). Energize Denver sets energy-use (EUI) targets for buildings of 25,000+ sq ft — for most buildings an interim target in 2028 and a final target in 2032 — with civil penalties of roughly $0.15–0.35 per kBtu over target for non-compliance.
More K-12 school buildings in Denver
- Garden Place Academy· 72,243 sq ft · score 64 (C)
- 773 Main Building· 72,000 sq ft · score 93 (A)
- St. Annes Episcopal School Campus· 71,858 sq ft · score 61 (C)
- Del Pueblo Elementary· 71,644 sq ft · score 71 (B)
- Smith· 70,945 sq ft · score 48 (D)
- John Amesse Elementary· 70,740 sq ft · score 31 (D)
- K-12 School buildings in Denver· 192 benchmarked
- All Denver benchmarked buildings· Energize Denver Building Performance Policy
- Most efficient large buildings in Denver
- Least efficient large buildings in Denver
- Biggest emitters in Denver
Frequently asked questions
What is Castro Elementary's energy grade?
Castro Elementary scores 32 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 Denver disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Castro Elementary use?
Its 2023 site energy-use intensity was 69.6 kBtu/ft² across 73,065 sq ft, including 566,092 kWh of electricity and 31,300 therms of natural gas.
What are Castro Elementary's carbon emissions?
Castro Elementary reported 466 tCO₂e of greenhouse-gas emissions for 2023.
Where is Castro Elementary?
Castro Elementary is at 845 South Lowell Boulevard, in Denver, Colorado 80219.
How big is Castro Elementary and when was it built?
Castro Elementary has 73,065 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1993 as its year built. It is classed as K-12 school.
Is Castro Elementary covered by the Energize Denver Building Performance Policy?
Yes — it appears in the 2023 Energize Denver Benchmarking disclosure, which lists the buildings reporting under the Energize Denver Building Performance Policy.
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About this data
Source: Energize Denver Benchmarking (Energize Denver Building Performance Policy), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Castro Elementary, Denver, Colorado — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/denver/castro-elementary-574d2f42 (data as of July 9, 2026).