Colorado Regulation 28 performance deadline: December 31, 2026 for buildings 100,000+ sq ft. Start your audit →

Statewide Coverage

Colorado Locations We Serve

Regulation 28 applies to commercial buildings across all of Colorado — not just Denver. We work with building owners and property managers throughout the Front Range, mountain communities, and the Western Slope.

City Compliance Guides

Each guide covers which buildings in that city must comply, local building stock data, applicable utility incentives, and compliance pathway considerations specific to that market.

Additional Colorado Markets We Serve

While detailed city guides are being published, we actively serve buildings in all of these Colorado markets. Regulation 28 applies statewide — every commercial building 50,000 sq ft or larger is covered regardless of city.

Lakewood
Thornton
Arvada
Westminster
Pueblo
Centennial
Highlands Ranch
Longmont
Loveland
Grand Junction
Broomfield
Castle Rock
Parker
Brighton
Commerce City
Northglenn
Englewood
Greeley
Aspen
Steamboat Springs

Don't see your city listed?

We serve all of Colorado. Send us your building's location and we'll get back to you with a quote.

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