Sec. 1-37

Accessory dwelling units

• Attached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. heightMaximum heightThe tallest a building may be, given in feet, in storeys, or both — whichever binds first. restriction

  An attached ADU shall not exceed the building height requirement of the base zoning district, and in no instance shall the height of an attached ADU exceed the height of the principal dwelling to which it is attached.

• Maximum area for conversion of existing accessoryAccessory useA secondary activity customarily incidental to the main use of the lot — a garage, a home office. structure800 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  that portion of the detached accessory structure so converted to an ADU unit shall not exceed eight hundred (800) square feet, or fifty (50) percent of the dwelling area of the principal dwelling, whichever is less.

• Detached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. maximum heightMaximum heightThe tallest a building may be, given in feet, in storeys, or both — whichever binds first.16 ft

  A detached ADU shall not exceed the height of the principal dwelling, or sixteen (16) feet, whichever is less.

• Detached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. rear setbackSetbackThe distance a building must be held back from a lot line.5 ft

  and a minimum of five (5) feet from the rear lot line

• Detached ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. side setbackSetbackThe distance a building must be held back from a lot line.5 ft

  A detached ADU shall have a setback a minimum of five (5) feet of the side lot line

• Exterior access location

  The ADU shall have a separate, independent exterior access, which shall be located in the side or rear yard

• Maximum ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. dwelling area800 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  An ADU shall not exceed eight hundred (800) square feet of dwelling area, or fifty (50) percent of the dwelling area of the principal dwelling, whichever is less.

• Maximum ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. as percentage of principal dwelling area50 pct

  or fifty (50) percent of the dwelling area of the principal dwelling, whichever is less.

• Maximum ADUs per lot1 units

  No more than one (1) ADU shall be located on a lot

• Maximum rear yardYardThe open space left between a building and its lot line — the space a setback creates. coverage by ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. and accessoryAccessory useA secondary activity customarily incidental to the main use of the lot — a garage, a home office. structures20 pct

  Any ADU, in conjunction with all other permitted accessory structures, if any, shall not cover more than twenty (20) percent of the rear yard area.

• Owner must reside on property

  A property owner shall reside on the property, either in the principal dwelling or in the ADU.

• Minimum pathway width to ADUAccessory dwelling unit (ADU)A second, smaller home on a lot that already has one — a garage flat, basement flat or backyard cottage. entrance36 in

  This pathway shall have a minimum width of thirty-six (36) inches at all points

• Short-term rentalShort-term rentalA dwelling let to guests for brief stays — the zoning category behind Airbnb rules. prohibitedProhibitedNot allowed in the district at all, short of rezoning or a variance.

  An ADU shall not be used as a short-term rental.

• Subdivision prohibitedProhibitedNot allowed in the district at all, short of rezoning or a variance.

  Any ADU shall not be subdivided or otherwise segregated in ownership from the principal dwelling.