Case Study: Creating Rental Income While Preserving Family Flexibility

Location: Inner suburb approximately 40 minutes east of Toronto (address withheld for privacy)

The Situation

A young professional couple purchased a detached home in an older suburban neighborhood within commuting distance of downtown Toronto. The property included a deep backyard that was rarely used beyond occasional gardening.

Like many first-time homeowners, the couple faced the challenge of managing a large mortgage while also planning for the future. They were interested in creating additional income to offset housing costs, but they also wanted to maintain flexibility in case their living needs changed later in life.

After exploring options such as basement rentals and secondary suites, they decided to pursue a detached garden suite that could function as an independent rental unit while remaining adaptable for future family use.

The Challenge

The primary constraint on this project was servicing and utility connections.

Because the garden suite was located toward the rear of a deep lot, new connections for:

water
sanitary sewer
electrical service

needed to be routed from the main house to the new building.

Excavation had to be carefully coordinated to avoid existing utilities and mature trees on the property. The homeowners were particularly concerned about preserving a large maple tree that provided shade to the backyard.

To address this, the servicing routes were adjusted to avoid the tree’s root system, and protective measures were put in place during excavation to prevent long-term damage to the landscape.

Design Considerations

The homeowners wanted the unit to function well as a rental property while still maintaining privacy between the main house and the garden suite.

Key design features included:

A one-bedroom layout optimized for a single tenant or couple
Large windows and vaulted ceilings to make the compact footprint feel more spacious
A small private patio area separated from the main yard
Independent heating and cooling so tenants could control their own environment
Dedicated exterior storage space for bicycles and seasonal equipment

The goal was to create a unit that felt like a small standalone home rather than an accessory building.

Construction

The total project cost for the garden suite, including servicing connections and site work, was approximately:

$285,000

Construction took roughly three months once permits were issued, with additional time spent on planning and permitting beforehand.

The final unit measured approximately 550 square feet and included:

one bedroom
one bathroom
full kitchen and living area
in-suite laundry

Financial Considerations

The couple’s primary objective was to create stable rental income to offset their housing costs.

The completed garden suite was rented to a long-term tenant for approximately:

$2,100 per month

This income significantly reduced the effective cost of their mortgage.

Unlike a basement apartment, the garden suite offered several advantages:

stronger tenant privacy
less noise transfer between units
the ability to maintain separation between landlord and tenant living spaces

Over time, the rental income helped the homeowners accelerate mortgage payments and improve their overall financial stability.

Long-Term Flexibility

An important part of the planning process was ensuring the garden suite would remain useful even if their circumstances changed.

The homeowners intentionally designed the unit so it could later serve multiple purposes, including:

housing for an aging parent
a residence for an adult child in the future
a private home office or studio
continued rental income

By building the garden suite early in their homeownership journey, they created a flexible asset that could adapt to different life stages.

The Outcome

The garden suite transformed an underutilized backyard into a valuable housing unit while maintaining the character of the neighborhood.

The project provided the homeowners with:

reliable supplemental income
greater financial resilience as homeowners
long-term flexibility for family needs

At the same time, the tenant benefits from a small standalone home in a desirable neighborhood, with access to transit, parks, and local services.

Key Takeaways

Garden suites can create stable rental income while preserving privacy between the main home and tenants.
Careful planning of servicing and utilities is often required for backyard units located far from the main house.
Designing the space with long-term flexibility allows the structure to adapt to changing family needs.
Accessory dwelling units can strengthen a homeowner’s financial position while increasing the supply of housing in established neighborhoods.