Maine solar permitting

Grade distribution

Overview

Every Maine county is scored on the SitePath solar permitting index. More than half are graded A or B, meaning they present low to moderate permitting risk for utility-scale solar projects. A minority sit in the C range — moderate risk with meaningful process uncertainty. A minority are rated D or F — high to very high risk, often due to active moratoria, restrictive setback ordinances, or strong local opposition.

The most favorable jurisdictions in Maine include Sagadahoc County (grade A), Lincoln County (grade B), Washington County (grade B). The most challenging include Kennebec County (grade C), Aroostook County (grade D), Androscoggin County (grade D).

At the state level, Maine's RPS 80% by 2030 commitment creates a supportive macro environment for solar development, though county-level boards retain significant discretion over individual project approvals. No Maine counties currently have an active utility-scale solar moratorium.

All counties — sorted by risk score (best first)

About SitePath scoring

Every U.S. county is scored 0–100 on solar permitting risk (lower is friendlier to development). The grade is a weighted composite of compliance stringency, market saturation, regulatory trajectory, and data uncertainty. Every figure traces back to a primary government document. Read the full methodology →