Building Setbacks & Zoning in Portland, ME (2026)
2 verified building setbacks & zoning rules for Portland, Maine, sourced directly from the municipal code and official government pages.
Verified from official government sources
Setback Rules
Portland's Land Use Code fixes front, rear and side setback minimums zone-by-zone in Table 7-A of Article 7, not as one citywide number. In the RN-1 Residential Neighborhood zone the minimum front setback is 20 feet, or the average of adjacent front yards minus 5 feet, whichever applies to the lot.
Portland, Maine Yard Setback Minimums By Zone
Some RestrictionsPortland Land Use Code, Article 7, § 7.3, Table 7-A; § 1.5.1 (Portland Code of Ordinances, Ch. 14, eff. 7/1/2026)
7.3 DIMENSIONAL STANDARDS. Tables 7-A to 7-G shall establish the dimensional standards for each zone. Certain additional standards may apply per Section 6.4 and Sections 7.4, 7.5, and 7.6. ... TABLE 7-A: RESIDENTIAL NEIGHBORHOOD ZONE DIMENSIONAL STANDARDS ... Front setback (min.) Principal structures and detached accessory structures (≥250 SF footprint), RN-1: 20 ft. or the average of adjacent ...
Structure Height Limits
Portland's Land Use Code caps residential structure height at 35 feet across the RN-1, RN-2, RN-3, and (as a base figure) RN-4 zones, drops to 18 feet in the low-density RN-5 zone, and allows up to 65 feet in the denser RN-6 zone. The City of Portland Height Map or Fort Sumner Park Height Overlay can override these Table 7-A baselines.
Portland ME Residential Building Height Limits
Some RestrictionsPortland Code of Ordinances, Land Use Code, Article 7 § 7.3, Table 7-A (eff. 7/1/2026)
TABLE 7-A: RESIDENTIAL NEIGHBORHOOD ZONE DIMENSIONAL STANDARDS. Structure height (max.) (Unless otherwise governed by the City of Portland Height Map or the Fort Sumner Park Height Overlay): RN-1 35 ft.; RN-2 35 ft.; RN-3 35 ft.; RN-4 35 ft., except 45 ft. for buildings with 3 or more dwelling units. In all cases, height shall be limited to 35 ft. within 15 ft. of a rear lot line when abutting ...