Portland City Code ch. 14

Citation: Portland City Code ch. 14
Parent Document: Portland City Code ch. 14
Jurisdiction: Portland (municipal)
Original Source: https://www.portlandmaine.gov/asset/ae8cabd1-66eb-4a1c-9224-92bbca5e792f ↗

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C. No accessory use or uses not within a building an ADU, the design of the ADU shall take
shall occupy more than a combined total of into consideration to the extent
25% of the unbuilt lot area, or of the required practicable the privacy of adjacent
rear yard area, with the exception of off-street properties.
parking or as otherwise provided in Subsection 7. The developer of an ADU shall record a
6.6.2. deed restriction requiring that the ADU
and at least one other non-accessory unit
6.6.2 Standards for specific accessory uses on-site remain under common ownership.
A. Accessory Dwelling Units (ADUs) 8. ADUs shall comply with all dimensional
1. Accessory Dwelling Units (ADUs) shall be requirements of the underlying zone
permitted on all lawfully conforming and except:
nonconforming lots with legal residential a. Lot coverage and lot area per dwelling
uses. ADUs shall comply with all unit requirements.
dimensional standards of the underlying b. Within the IR-1 zone, the minimum lot
zone unless otherwise provided below. area shall be 70,000 square feet,
2. Up to two ADUs shall be permitted per except on Peaks Island where this
qualifying property. standard shall not apply.
3. At the time of an ADU’s initial construction c. Within the IR-2 zone, the minimum lot
or legal creation, the owner(s) of the area shall be 30,000 square feet,
property on which the accessory dwelling except on Peaks Island where this
unit is created must occupy at least one of standard shall not apply.
the dwelling units, with the exception of 9. An ADU shall be limited to a gross floor
legally nonconforming lots on Peaks Island. area of 2/3 of the gross floor area of the
4. On Peaks Island, neither the accessory unit principal unit(s). In no circumstance shall
or principal unit shall be used for short- the height of detached ADUs on a lot
term rentals as defined under Chapter 6, exceed the height of the primary structure.
Section 150.1 of the City of Portland Code Additionally, the aggregate square footage
of Ordinances. of detached ADUs on a lot shall not exceed
5. When an ADU is significantly visible from the gross floor area of the primary
public ways, the building design shall: structure.
a. Be clearly subordinate to the principal B. Amusement devices. Except where the
structure(s) in scale and position in principal use consists of the sale of alcoholic
relationship with the street and beverages for consumption on premises or
principal structure(s). where the principal structure is an airline
b. Not include outside stairways or fire terminal, pinball machines or amusement
escapes above the ground floor. devices shall not be considered to be accessory
6. Under circumstances where an existing uses whenever there are more than a total of
nonconforming structure is converted to two such machines or devices on the premises. CITY OF PORTLAND LAND USE CODE | 6-31 USE STANDARDS

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