title: "Building Electrification Codes: Which States Are Leading" date: 2026-01-15 category: Policy tags: ["building codes", "electrification", "policy", "gas ban", "heat pumps"] summary: "Building codes and ordinances are accelerating the shift from gas to electric appliances in new construction. A state-by-state overview."
Building Electrification Codes: 2026 State Overview
Building codes and local ordinances are increasingly steering new construction — and sometimes major renovations — away from fossil fuel appliances and toward electric alternatives. Here's where things stand.
Federal Landscape
The U.S. DOE updated model energy codes (based on ASHRAE 90.1 and IECC standards) to strongly favor heat pumps and electric appliances. However, building codes are adopted and enforced at the state and local level, creating a patchwork of policies.
State-by-State Status
Leading States (Active Electrification Codes)
| State | Key Provisions | Effective | |-------|---------------|:-:| | Washington | Statewide: heat pumps required for space and water heating in new residential. Gas allowed only as backup in specific climate zones. | 2023 code cycle | | California | Title 24 (2022): Electric-ready baselines; heat pump water heater as standard. Dozens of cities adopted reach codes eliminating gas in new construction. | 2023+ | | New York | All-electric requirement for new buildings: under 7 stories by 2026, all new buildings by 2029. Part of Climate Leadership & Community Protection Act. | 2026/2029 | | Colorado | HB22-1362 enables local electrification ordinances. Denver, Boulder adopted gas hookup restrictions in new construction. | 2023+ | | Massachusetts | 10 municipalities approved for "fossil fuel free" pilot in new construction. State stretch code strongly favors heat pumps. | 2023+ | | Oregon | Portland banned gas in new low-rise residential. State code updated with heat pump incentives. | 2023+ | | Maine | Goal of 100,000 heat pumps installed by 2027. Efficiency Maine incentives make heat pump default choice. | Ongoing | | Vermont | Clean Heat Standard incentivizes fuel switching. Aggressive weatherization and heat pump programs. | 2024+ |
Active / Transitioning States
| State | Key Provisions | |-------|---------------| | Illinois | Chicago adopted Clean Buildings Ordinance; state-level discussions ongoing | | Connecticut | Building performance standards under development; utility heat pump incentives expanding | | Rhode Island | 2030 Act on Climate driving electrification discussions | | Maryland | Building performance standards for large buildings; climate plan includes electrification | | Minnesota | Expanded clean energy standards; heat pump adoption growing rapidly | | New Jersey | Electric-ready requirements in updated building code |
States Restricting Local Electrification
Over 20 states have passed "preemption laws" that prohibit cities and counties from restricting gas hookups in new construction:
Notable states with preemption: Arizona, Arkansas, Florida, Georgia, Indiana, Iowa, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Ohio, Oklahoma, Tennessee, Texas, Utah, West Virginia, Wyoming.
These laws were largely passed between 2020–2024, often with natural gas industry support. They don't prevent homeowners from choosing electric appliances — they prevent local governments from mandating them.
What the Codes Actually Require
"Electric-Ready" vs. "All-Electric"
Important distinction:
- Electric-ready: New buildings must include 240V circuits and panel capacity for future electric appliance installation, but gas is still allowed. This is the minimum standard in most progressive codes.
- All-electric: New buildings cannot include gas piping for space heating, water heating, cooking, or clothes drying. Exceptions may exist for commercial kitchens or specific building types.
Common Provisions
- Heat pump space heating — required or baseline option in energy modeling
- Heat pump water heating — required or strong incentive through code credit
- Electric-ready wiring — 240V outlets in kitchen (stove), laundry (dryer), garage (EV charger)
- Panel capacity — minimum 200A electrical panel (many codes moving to 225A) to support full electrification
- No gas line in new construction (in strongest codes)
Impact on Consumers
New Home Buyers
In states with electrification codes, new homes increasingly come with:
- Heat pump HVAC (often variable-speed for efficiency)
- Heat pump water heater
- Induction cooktop
- Electric dryer
- EV-ready garage circuit
- Solar-ready conduit and panel space
This eliminates the cost of later retrofitting (which can be $5,000–$15,000+ for panel upgrades, wiring, and equipment).
Existing Homeowners
Codes typically apply only to new construction and major renovations (>50% of assessed value). Existing homeowners are not required to replace working gas equipment.
However, the incentive landscape strongly favors switching at the natural replacement point:
- 25C tax credits ($2,000 for heat pump, $2,000 for HPWH)
- HEEHRA rebates ($8,000+ for qualifying households)
- Utility rebates ($500–$2,000+)
- Avoided gas connection charges ($30–$50/month in some utilities)
Home Resale Impact
Research from Freddie Mac and Redfin indicates:
- All-electric homes may command premiums in markets with climate-conscious buyers
- Energy efficiency certifications (ENERGY STAR, LEED, HERS) correlate with 2–5% higher sale prices
- Risk of "stranded asset" narrative for gas infrastructure in leading states
The Economic Argument
A 2024 RMI (Rocky Mountain Institute) analysis found that all-electric new construction is cheaper than mixed-fuel (gas + electric) construction in most climate zones when considering:
- Avoided gas line infrastructure (~$3,000–$7,000 per home)
- Avoided gas meter and service charges
- Lower operating costs (heat pump efficiency)
- Simpler mechanical systems
The gap widens further when incentives are included.
Outlook
The trend toward building electrification in codes is accelerating in coastal and northern states while meeting resistance in fossil-fuel-producing states. The net result is a growing share of new homes built all-electric — even in states without mandates, driven by builder economics and consumer preference.