Additional Residential Units

 Location on Lot

• An ARU must be located entirely within the same building as the primary dwelling unit

• An ARU is not permitted on a lot containing shared housing, garden suite, bed and breakfast establishment, farm vacation home, or farm employee accommodation

• In all Residential, Agricultural (A), and Rural (RU) zones, a maximum of 2 ARUs are permitted within the same building as the primary dwelling unit or 1 ARU within the main house and 1 ARU in a detached accessory building

Size

• A maximum of 3 bedrooms is permitted in an ARU
• The maximum gross floor area of an ARU may not singularly exceed 50% of the gross floor area of the primary dwelling unit
• ARUs that are located in the basement may occupy the entire basement

Driveways/Entrances

• Only one entrance is permitted to provide vehicle access from the street
• If the entrance of the ARU is located in an interior side yard, the entrance (including any stairs) to the ARU is required to be a minimum of 1.2 metres from the side lot line

Parking

• Lots with less than 2 parking spaces are required to have 1 additional parking space for the first ARU
• Lots with 2 or more parking spaces do not require an additional parking space for the first ARU
• Lots with 3 or more parking spaces do not require an additional parking space for the second ARU
• Parking is subject to Section 5.6 (Residential Parking Requirements) of The Municipality of Port Hope’s Zoning By-law

Water and Sewage Servicing

• Where municipal services are available, both the primary dwelling unit and the ARU(s) on the same lot must be connected to municipal water and sewer services
• An ARU may be permitted on a lot where a municipal water supply system and/or municipal sanitary sewer are unavailable within the Hamlet Residential One and Two (RESV1 and RESV2), Rural Residential 'RESR', Estate Residential 'RESE', Agricultural 'A', and Rural 'RU' Zones
• The Municipality may require the demonstration of sufficient municipal water and/or wastewater servicing capacity to service an ARU from an independent qualified professional (P. Eng)

Location

• An ARU is not permitted on a lot containing shared housing, garden suite, bed and breakfast establishment, farm vacation home, or farm employee accommodation
• An ARU is not permitted within the Environmental Protection - Floodplain ‘EP-F’ Overlay Zone or in a floodplain as identified by the Conservation Authority
• An ARU is subject to the applicable zoning provisions under Table 4.1 and Table 4.2 except where otherwise modified by the zoning bylaw
• One ARU is permitted within the main house and one ARU in a detached accessory building in all residential zones, Agricultural ‘A’ and Rural ‘RU’
• A maximum of 2 ARUs are permitted within the same detached accessory building only in Low Density Residential One ‘RES1’, Low Density Residential Two ‘RES2’, Medium Density Residential ‘RES3’, High Density Residential ‘RES4’, Hamlet Residential One ‘RESV1’, Hamlet Residential Two ‘RESV2’ Zones, Estate Residential ‘RESE’ and Rural Residential ‘RESR’ Zones
• An ARU shall be set back no further than 40 metres from the public street in permitted residential zones
• No part of an ARU shall be located further than 40 metres from the main house within the Hamlet Residential One and Two (RESV1 and RESV2), Rural Residential ‘RESR’, and Estate Residential ‘RESE’ Zones 

Size

• A maximum of 3 bedrooms are permitted in an ARU
• In any Residential Zone, the maximum gross floor area of the ARU(s) must not singularly or cumulatively exceed 90% of the gross floor area of the primary dwelling unit, to a maximum gross floor area of 100 square metres and not exceed 45% lot coverage 
• In permitted Countryside Zones, the maximum gross floor area of the ARU shall not exceed the gross floor area of primary dwelling unit or 100 m2, whichever is less
• The accessory building containing an ARU shall not exceed the height of the primary building or 6.5 metres, whichever is less, to a maximum of 2-storeys. If the ARU is located within a detached building used for agricultural purposes in a countryside zone, then the maximum permitted height is 9 metres

 Driveways/Entrances

• A maximum of one entrance to the principal building shall be permitted along each public street
• If the entrance of the ARU is located in an interior side yard, the entrance (including any stairs) to the ARU is required to be a minimum of 1.2 metres from the side lot line

 Parking

• Lots with less than 2 parking spaces are required to have 1 additional parking space for the first ARU
• Lots with 2 or more parking spaces do not require an additional parking space for the first ARU
• Lots with 3 or more parking spaces do not require an additional parking space for the second ARU
• Parking is subject to Section 5.6 (Residential Parking Requirements) of The Municipality of Port Hope’s Zoning By-law 

• Where municipal services are available, both the primary dwelling unit and the ARU(s) on the same lot shall be connected to municipal water and sewer services of adequate size
• An ARU may be permitted on a lot where a municipal water supply system and/or municipal sanitary sewer are unavailable within the Hamlet Residential One and Two (‘RESV1’ and ‘RESV2’), Rural Residential ‘RESR’, Estate Residential ‘RESE’, Agricultural ‘A’, and Rural ‘RU’ Zones
• If a new well is proposed to support an ARU, it must be demonstrated to the satisfaction of the Municipality that the applicable provisions of the Ontario Building Code are met and a Hydrogeological Study is to be completed from an independent qualified professional (P.Eng.) or geoscientist (P.Geo) to determine that the groundwater quality and quantity is sufficient for the ARU and will not adversely impact the water supply of adjacent lots and the primary dwelling unit
• The Municipality may require a grading plan and/or stormwater management plan from an independent qualified professional (P. Eng)