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Basalt panel backs revised sustainable building rules, shifts PV requirements and raises HERS targets
Summary
The Planning & Zoning Commission voted Oct. 15 to recommend code amendments to the town's Sustainable Building regulations that change when photovoltaic requirements apply, adjust HERS rating targets, and clarify allowable offsets and fee incentives for high-performance certifications.
The Basalt Planning & Zoning Commission on Oct. 15 recommended that Town Council consider amendments to Chapter 18 of the municipal code to update the town's Sustainable Building regulations.
Staff explained changes reflect technological shifts and utility supply improvements since the town adopted the rules in 2022. Presenters said Holy Cross Energy's portfolio has shifted such that the utility is now supplying roughly 90% renewable power in 2024, which reduces the need to require on-site PV on certain building types. The proposed code would move the PV requirement away from being tied to a "Type 1" construction category and instead target exterior energy uses such as snowmelt systems, pools and spas, heat tape and exterior heaters.
Mitch Miller, the town's Chief Building Official, answered technical questions about HERS (Home Energy Rating System) thresholds, multifamily treatments and compliance paths. Miller discussed example HERS adjustments used for modeling: "the original the spr score was 40 and now I've changed it to 52," and for all-electric examples from 45 to 55, indicating the staff's proposed target numbers for compliance discussions. He also said multifamily units under 2,000 square feet would use REScheck rather than a HERS path in certain cases.
Commissioners asked about offsite offsets and fee incentives. Staff said Holy Cross does not currently operate a program for offsite PV offsets, and the town's fee schedule provides rebates and review-fee paths for Energy Star and LEED-like certification (the transcript referenced "lead gold" certification and energy-review rebates). Public comment time yielded no speakers online. Commissioner Bill Marin moved to recommend the amendments and Commissioner Cindy Hfield seconded; a voice vote carried.
Why it matters: The amendments attempt to balance town energy-efficiency goals with changing utility conditions and construction realities, offering alternative compliance paths and clarifying when PV will be required. The changes could reduce the immediate cost pressure on single-family construction while maintaining energy-performance targets.
Next steps: The commission's recommendation will be forwarded to Town Council for a public hearing and further action.
