City of Waterloo Now Offering Grants for Basement Apartments, Garden Suites, and Tiny Homes

Homeowners in Waterloo now have an incredible opportunity to make their properties more functional and valuable  while supporting the city’s affordable housing goals.
The City of Waterloo has officially launched grants for Additional Residential Units (ARUs)  also known as Secondary units, ADUs, basement apartments, garden suites, and tiny homes helping residents offset up to 50% of their project costs.

This new initiative is part of the City’s effort to unlock creative housing solutions and promote affordable, multigenerational living.

What Are Additional Residential Units (ARUs)?

An Additional Residential Unit (ARU) is a self-contained living space built on a property with an existing home.
These can take different forms:

🏠 Interior Units – basement apartments, in-law suites, or additions within the main house.

🏡 Detached Units – garden suites, tiny homes, or garage conversions built as separate structures, usually in the backyard.

The City of Waterloo’s zoning by-laws now allow up to four residential units per property, depending on the lot size and servicing.

ARU Grant Program Details

The City of Waterloo’s ARU Grant Program offers two funding streams for eligible property owners:

1. Detached ARU Grant – Up to $30,000

• Covers up to 50% of project costs for detached units.
• Applies to garden suites, laneway houses, tiny homes, or garage conversions.

2. Interior ARU Grant – Up to $20,000

• Covers up to 50% of project costs for interior units.
• Applies to basement apartments, in-law suites, or additions inside your existing home.
• The program aims to support the creation of 25 ARUs through the federal Housing Accelerator Fund, improving access to affordable and sustainable housing across the region.

Who Qualifies for the Grant?

To qualify:

• The property must be within the City of Waterloo.
• The ARU must meet zoning and building permit requirements.
• The unit must be rented at or below 80% of CMHC’s Average Market Rent for at least five years to qualify under the affordable housing stream.
• This makes the program ideal for homeowners looking to:
• Add a rental suite or mortgage helper.
• Create multi-generational living spaces for family.
• Increase property value while contributing to local housing goals.

Why Build an ARU or Basement Apartment in Waterloo?

ARUs offer multiple benefits — both personal and community-wide:
✅ Generate rental income or provide affordable housing.
✅ Create flexible space for aging parents or grown children.
✅ Increase property value and long-term equity.
✅ Use existing infrastructure and services efficiently.

With housing demand and mortgage rates rising, building a secondary unit, tiny home, or garden suite is one of the smartest investments homeowners in Waterloo can make.

How to Apply for the City of Waterloo ARU Grant

Applications are now open, and funding is limited. Once the allocation is reached, eligible applicants will be placed on a waitlist.

Visit the City’s official Additional Residential Units page to review eligibility and submit your application.

Need Help with ARU or Basement Permits in Waterloo?

At Inarch Consultancy, we specialize in:

• Preparing basement apartment and ARU permit drawings
• Designing garden suites and tiny homes that meet zoning and Ontario Building Code standards
• Coordinating with engineers and city staff for a smooth approval process
• Guiding you through the grant application and building permit process step by step

If you’re planning to add an Additional Residential Unit (ARU) in Waterloo, Kitchener, or Cambridge, we can help you design, plan, and permit it efficiently.

📩 DM us or contact us at www.inarch.ca to find out if your property qualifies for the City of Waterloo ARU Grant Program.