Could Corner Lots Have an ADU Advantage?

From my experience, corner lots have always been a bit polarizing. Some buyers appreciate the extra light and having one fewer neighbour. Others see twice the sidewalk to shovel and a yard that feels on display from two directions.

Usually, when we're evaluating a corner property, we weigh those pros and cons and decide whether the trade-offs are worthwhile.

Lately, though, I've started looking at corner lots a little differently — with additional dwelling unit (ADU) potential in mind.

The backyard isn't always the problem

When people imagine an ADU — a garden suite, coach house or small home out back — the first question is usually obvious: Is the backyard big enough?

That's a reasonable place to start. But the more you learn about ADUs, the more you realize that yard size isn't necessarily what makes or breaks the idea. Sometimes, it's how you get to the ADU.

In Guelph, pedestrian access is one of the considerations for a detached unit. On a typical interior lot, that can mean needing a suitable route alongside the existing house. Sounds simple enough until you walk down that side yard and encounter an air conditioner, gas meter, basement window well, stairs — or any number of things that weren't installed with a future backyard home in mind.

Suddenly, a property with a fantastic backyard looks a little more complicated.

Corner lots can change the equation

This is the part I find interesting. Depending on the applicable rules and the property's configuration, access directly from a street or lane may change what's possible. Corner lots have something interior lots don't: a second street frontage. That second frontage might offer a way to reach a detached ADU without squeezing past the existing house.

There's another consideration worth exploring. Imagine an ADU with its entrance facing the side street. It could feel less like a unit tucked into someone's backyard and more like a small home with its own presence on the street. When — understandably — homeowners get prickly about the prospect of these ‘tiny homes’ popping up in backyards and just looking out of place or impacting privacy, that kind of street-facing placement is interesting.

As the homeowner residing in the primary residence, another potential benefit is that it removes the need for someone to regularly walking past a deck or patio in order to reach the ADU. The two living spaces, in other words, could feel more distinct.

The very thing that once made a corner lot feel exposed might, in the right circumstances, create more separation. That's an interesting reversal.

A corner lot doesn't automatically mean a better lot

We're in ADU territory, so you know there's going to be an asterisk. There's always an asterisk.

A second street frontage may present an opportunity, but it brings its own considerations. Setbacks still matter. So do the location of the existing house, usable yard area, servicing, parking, trees and all the other factors that determine what might work on a particular property.

I'm not suggesting every corner lot is secretly an ideal ADU property. But if an ADU is part of your future plans, it's a feature worth investigating. And potential is the key word here. A property may have several characteristics that make me curious about its ADU possibilities and still fail to meet the City's requirements.

Potential is a reason to look closer. It should never be confused with feasibility.

Reading listings differently

Homebuyers become fluent in real estate listing language surprisingly quickly. After a few weeks, terms like ‘days on market’ become second nature. If an ADU is part of your longer-term plans, it's worth developing a new way of reading those listings. The corner lot you might once have scrolled past could deserve another look.

How the house sits on the lot, what the second frontage looks like, where access might work and how the yard is configured can all make a difference. Two corner properties that look nearly identical online could be very different propositions when you're standing on them. And if you already own a corner property, it might be worth looking at your side yard a little differently, too.

One of the things I find most interesting about ADUs is how they challenge old real estate assumptions. A deep lot. A detached garage. An unusually positioned house. A corner property. Features that once fell neatly into the pro or con column may not be so simple anymore.

No, corner lots aren't secretly perfect. But I do think ADUs might change how some buyers see them.