Three Ways to Add an Accessory Dwelling Unit to Your Property

 

As housing demands continue to grow in Ontario, more homeowners are turning to Accessory Dwelling Units (ADUs) as a smart way to maximize their property’s potential. Whether you're looking to create a rental suite for extra income, accommodate extended family, or simply increase your home's value, adding an ADU can be a strategic investment. At House of Three, we specialize in custom designs and BCIN-licensed blueprints that bring these spaces to life.

Here are three ways to add an ADU to your property.

1. Add a Basement Suite

A basement suite is one of the most straightforward and cost-effective ways to create an ADU. Most Ontario homes already have the space available, making this option less disruptive than building a new structure. With the right design and permits, a basement can be transformed into a legal, comfortable, and private living area. From separate entrances to proper soundproofing and egress windows, careful planning ensures your basement suite meets safety standards and enhances both functionality and resale value.

2. Convert a Laneway Garage into a Suite

If your property backs onto a laneway and includes a detached garage, you may have the perfect setup for a laneway suite. Converting a garage into an ADU allows you to make use of underutilized space while maintaining privacy between the main home and the secondary unit. This option is especially popular in urban areas where space is limited but demand for rentals is high. A custom design can help you overcome challenges like insulation, plumbing, and maximizing a compact layout—ensuring the new suite is both stylish and fully functional.

3. Construct a New Purpose-Built Space

If your property has the space (and proper zoning!), constructing a new, purpose-built structure is a fantastic way to add a fully customized ADU. Unlike conversions, this approach allows you to design the unit from the ground up—tailoring it to specific needs like accessibility, privacy, or energy efficiency. In addition, starting fresh means you can maximize the potential of your lot while ensuring full compliance with local zoning and building codes.

Finally, adding an ADU to your property is a great way to create more usable space, boost your home's value, and respond to Ontario’s changing housing landscape. Whether you’re considering a basement suite, a laneway garage conversion, or a purpose-built space, each option comes with unique opportunities and challenges. 

At House of Three, we provide the custom designs and blueprint expertise needed to make your project a success from start to finish. Let’s bring your vision to life—safely, smartly, and beautifully. Get in touch with House of Three today.