Overview
Preemption classification
Tier B — Pro-housing moderate
LD 2003 (2022) allows ADUs and 2-4 units on residential lots statewide. Implementation uneven in small rural towns.
Governance
Statewide
Building and zoning code adoption is mandated at the state level.
Adopted building codes
Cities > 4,000 pop
City-level IBC adoptions (1)
| City | IBC | Amendment notes |
|---|---|---|
| Portland ME | 2021 |
View building-code adoption for Maine →
4 of 5 codes adopted (IBC, IRC, IECC, NEC)
Cities
Showing 1 of 1
| City | Population | Code | Status | Issues |
|---|---|---|---|---|
| Portland | — | City of Portland Land Use Code, Chapter 14 (ReCode Portland · 14 districts | V1 Legacy | schema:v1-legacypriority:lowdata:gaps-present |
Research status
Data quality
0%completeness1 not found