Trustees review proposed 2021 building code updates; public and staff ask for clarifications and phased follow‑up

The Board of Trustees on March 12 held an extended discussion of proposed updates to the town's building codes, including adoption of the 2021 model codes with local amendments, proposed alignment of the energy and residential efficiency program, and proposed removal of the International Green Construction Code (IGCC) in favor of provisions embedded in other codes.

Why it matters: Code updates affect permitting, construction costs, energy performance, public safety, and long‑term community goals such as reduced greenhouse gas emissions and increased housing accessibility. Trustees said they viewed this as an opportunity to modernize local enforcement and align town policy with state requirements, but several community groups asked for additional amendments or an implementation task force.

Staff overview: Building Official Aaron summarized key 2009→2021 code changes that affect plan submissions, deck attachment and guardrail strength standards, condensation control, duct testing and ventilation, higher residential insulation levels (climate zone definitions), window‑opening limiting devices, and changed smoke‑alarm rules for remodels. Aaron explained his proposed amendments to maintain consistency between the energy code and residential rules and to carry forward high‑level green building provisions where the town already enforces them. He recommended removing the standalone IGCC because many of its provisions were covered in the updated codes and some items would be better addressed in the Unified Development Code.

Fire perspective: Fire Marshal Carl Oliver said the town’s fire code was last adopted in 1988 and that the department intends to adopt a modern fire code consistent with the 2021 building codes to address hazards such as battery‑energy storage, lightweight construction, and to align inspection and enforcement.

Public comment and stakeholder feedback: More than a half dozen residents, builders and advocacy groups spoke. • Age Friendly Carbondale urged the board to create a stakeholder task force and to add universal‑design standards (for entry thresholds, outlet heights, maneuvering spaces and other age‑friendly features) in a near‑term code amendment or through incentives rather than wait years for the next cycle. • Confluence Architecture supported the proposed tiered HERS approach for residential efficiency but urged the board to retain tier‑2 performance requirements rather than relax them, and to keep Climate Zone 5 settings to match national HERS tools. • Builders and developers asked for clarity about exemptions (for example small accessory structures under 20 sq ft and foundation rules) and how UDC impervious‑coverage rules and permit exemptions will interact with building code changes. • Energy advocates urged clear cold‑climate heat‑pump guidance, and noted that rooftop solar permitting and PV‑readiness rules are evolving at the state level. • Several commenters asked that the town retain its commercial PV expectations or provide equivalent energy offsets rather than remove on‑site renewable requirements.

Trustee concerns and direction: Trustees asked staff to (a) produce a clear crosswalk showing where IGCC provisions were retained, moved to other codes, or intentionally omitted; (b) clarify the residential exemption language tied to permeable/impermeable coverage and how that interacts with the UDC; (c) return with specific language or a stakeholder plan to address universal design — possibly as a focused amendment in the next code cycle — and (d) research battery‑energy‑storage and monitoring requirements for commercial PV systems in coordination with the fire marshal.

Next steps: Staff said they will refine the draft amendments, produce a crosswalk document showing where IGCC provisions landed, check hardware/software requirements for PV monitoring where required, and present a revised ordinance back to the board (staff suggested a potential implementation window of several weeks to allow public review). Trustees signaled they expect more targeted follow‑up on universal design and energy‑storage safety before final adoption.

Ending: The board closed the public hearing portion of the discussion and directed staff to return with the requested clarifications and redlines for a likely final vote at the next meeting cycle.