Vermont — Code Adoption Summary
Adoption model: Statewide-mandatory energy code (RBES residential / CBES commercial) with an unusual dual-compliance flexibility — builders may choose EITHER the 2020 or 2024 standard. Electrical/plumbing separately administered.
Last verified: 2026-07-03
Confidence: verified (NEC edition — confirm; not pinned down in sources found)
Primary sources: VT Dept. of Public Service, Building Energy Standards — https://publicservice.vermont.gov/efficiency/building-energy-standards · ICC VT
Statewide adopted codes — current (2026)
| Code family | Adopted edition | Notes | Source |
|---|
| Energy (residential) | RBES — new 2025/2026 rule (adopted 2026-04-10, eff. 2026-07-14) allows compliance with EITHER the 2020 or 2024 RBES (2018/2021 IECC-based + VT-specific stringency additions) | unusual dual-track flexibility to ease housing construction | publicservice.vermont.gov |
| Energy (commercial) | CBES — same dual 2020/2024-standard flexibility, eff. 2026-07-14 | | " |
| Plumbing | 2024 IPC via the 2025 Vermont Plumbing Rules | VT = IPC | " |
| Electrical (NEC) | Confirm current edition directly with VT Division of Fire Safety — not conclusively identified in this pass ⚠ | | publicservice.vermont.gov |
Adoption model & precedence
- The RBES/CBES energy codes are statewide-mandatory, with the notable feature that builders can choose the older (2020) or newer (2024) standard during the transition — a deliberate housing-supply accommodation, not a typical "one edition only" rule.
- AHJ = Division of Fire Safety for the state-administered codes; local jurisdictions may layer additional requirements.
Major cities / counties
| Jurisdiction | Notes | Building dept. |
|---|
| Burlington | Publishes its own adopted-codes/standards page — confirm any local layer | burlingtonvt.gov |
| Essex | confirm local adoption | essexvt.org |
| South Burlington | confirm local adoption | southburlingtonvt.gov |
AHJ fallback (when local adoption is unverified)
- State baseline (certain): RBES/CBES with either 2020 or 2024 standard permitted (eff. 2026-07-14), 2024 IPC (2025 VT Plumbing Rules).
- Action: confirm the current NEC edition directly with the VT Division of Fire Safety — not conclusively found in this pass.
Change log
- 2026-07-03 — created; verified the unusual dual 2020/2024 RBES/CBES compliance flexibility (eff. 2026-07-14) and 2024 IPC plumbing; NEC edition flagged for direct confirmation.
