Understanding Accessory Dwelling Units (ADUs) in Guelph: Key Regulations You Need to Know

In Guelph, Accessory Residential Dwelling Units (ADUs), commonly known as in-law suites, basement apartments, or garden suites, are becoming a popular option for homeowners looking to add extra living space. Whether you’re considering creating a rental unit or accommodating family members, understanding the regulations and zoning requirements is crucial.

Here’s everything you need to know about building and registering an ADU in Guelph:

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What is an Accessory Residential Dwelling Unit (ADU)?

An ADU is a self-contained unit located within the same building or on the same lot as a primary dwelling. It can either be within the main house (such as a basement apartment) or in a separate accessory building (such as a garden suite or laneway house). However, it must comply with local zoning and building regulations to be legalized.

How to Register Your ADU in Guelph

Whether your ADU is new or existing, registration with the city is required under the Additional Residential Dwelling Units Bylaw.

• New ADUs: Homeowners must apply for a building permit to ensure the unit meets safety and construction standards.

• Existing ADUs: If your ADU was created without a permit, you must still apply for the necessary permits to legalize the unit.

Registration Fees

In addition to building permit fees, a one-time registration fee is charged based on whether the unit was built with a permit and whether the owner occupies one of the units.

• New ADU (Owner-Occupied): $160

• New ADU (Non-Owner-Occupied): $320

• Existing ADU (Owner-Occupied): $320

• Existing ADU (Non-Owner-Occupied): $640

Zoning Regulations

Your ADU must meet certain zoning requirements:

• Eligible Zones: ADUs are allowed in R.1, R.2, and R.3B residential zones.

• Ineligible Zones: They are not permitted in Cluster Townhouses in R.3A zones or in buildings with more than two dwelling units (such as triplexes or four-plexes).

• Size and Space Requirements:

  • Main Building ADUs: The unit can’t exceed 45% of the gross floor area and must have interior access to the main house.

  • Accessory Building ADUs: The unit can’t exceed 80 m² (861 square feet) and must occupy no more than 30% of the yard.

  • Height Restrictions: The maximum height for a standalone accessory ADU is 5 meters (6.1 meters if above a detached garage).

Permit and Inspection Process

1. Permit Application: Submit your application electronically through the Guelph Permit System. Ensure you include detailed floor plans and a site plan that shows required parking spaces.

2. Building and Zoning Inspections: Once construction starts, you’ll need to schedule inspections. The building must comply with fire separations, plumbing, and heating requirements.

3. Electrical Safety: A licensed electrical contractor must inspect the unit and certify that there are no hazards.

Additional Requirements

• Parking: A minimum of one parking space per ADU is required, along with one legal off-street parking space for the host unit. Parking spaces must meet size specifications (3 meters by 6 meters).

• Servicing: Separate servicing (water, sanitation, etc.) may be required if the ADU is in a detached structure.

Impact on Property Taxes

Adding an ADU to your property may affect your property taxes. It's best to consult the Municipal Property Assessment Corporation (MPAC) for specific guidance regarding tax changes due to the creation of an ADU.

Conclusion

Building an Accessory Residential Dwelling Unit in Guelph can be a rewarding way to add value to your property, create extra income, or house family members. By following the required zoning laws, obtaining necessary permits, and adhering to registration processes, you can ensure your ADU is compliant and safe.

If you’re considering adding an ADU to your property, Kallos Building Group is here to help guide you through the permitting process, from design to completion. Contact us today to get started!