Portland Land Use Code

Citation: Portland Land Use Code
Parent Document: Portland Land Use Code
Jurisdiction: Portland (municipal)
Original Source: https://www.portlandmaine.gov/asset/a5dcd1dc-4117-40b3-b3da-74a56919e14b ↗

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perimeter. Parking structures and the C. Minimum setback exceptions for
buildings for public transportation facilities nonconforming lots
may, however, be set back beyond the key 1. In the case of a nonconforming lot existing
building envelopes (toward the interior of as of June 5, 1957 in the RN-1, RN-2, RN-3,
blocks), but may not occupy the land and RN-4 zones and less than 100 feet
between the key building envelope and the deep, the front setback need not be
street right-of-way. deeper than 20% of the depth of the lot.
8. Build-to zone requirements shall not apply 2. In the case of a nonconforming lot existing
to additions to existing buildings as follows: as of June 5, 1957 in a residential zone, the
a. Build-to zone requirements shall not required side setback for principal
apply to vertical additions to existing structures may be reduced in order to
buildings to meet minimum height provide a buildable width of up to 24 feet
requirements. as follows:
b. In the B-1, B-2, and B-2b zones, build-to a. RN-1, RN-2: No side setback shall be
zone requirements shall not apply to reduced to less than 5 feet.
additions to buildings existing as of b. RN-3: One side setback may be
the effective date of this Code that do reduced to zero feet, provided the
not cumulatively exceed 50% of the other shall be reduced to not less than
building footprint as the effective date 5 feet. A permanent maintenance
of this Code. However, any such easement a minimum of 5 feet in
additions shall increase conformity width shall be provided on the parcel
with the standards to the extent adjacent to the lot line with the zero
practicable. foot setback.
c. In the B-4, B-5, B-6, TOD-1, and TOD-2
zones, build to zone requirements 7.6.6 Stepbacks and areas of limited height
shall not apply to additions to adjacent to RN or open space zones
buildings existing as of the effective A. A cornice eave, sill, canopy, chimney, bay
date of this Code that do not window, balcony, or other similar architectural
cumulatively exceed 25% of the feature may project into any required stepback
building footprint as of the effective or area of limited height adjacent to an RN or
date of this Code. However, any such open space zone a distance of not more than
additions shall increase conformity two feet.
with the standards to the extent B. Building mounted mechanical equipment may
practicable. encroach into a required stepback or area of
limited height adjacent to an RN or open space
zone by no more than 50% of the width of such 7-26 | CITY OF PORTLAND LAND USE CODE DIMENSIONAL STANDARDS

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