“As-of-Right” Explained: Why Most Garden Suites Skip the Hearings
As-of-right zoning is the single biggest reason garden suites are practical today. Here is what the term actually means, what still gets checked, and when a project falls outside it.
What “As-of-Right” Actually Means
As-of-right is a planning term for a simple idea: if a proposed building meets every number in the zoning by-law, the municipality has to allow it, no public hearing, no committee vote, no neighbour sign-off required as a condition of approval. Before Ontario's recent reforms, adding a second dwelling to a residential lot often meant applying for a rezoning or a minor variance, a process that could take the better part of a year and depended on how a committee felt about your particular street. Bill 23 and O. Reg. 462/24 changed the default: on most residential lots in Ontario, up to three residential units, your existing house plus two more, are now permitted outright, provided the design fits the zoning envelope. That shift is why garden suites went from a rare, hard-won exception to a routine building-permit application in the space of a few years.
What Still Gets Reviewed Even When You're As-of-Right
As-of-right removes the political layer of approval, not the technical one. Every garden suite still goes through a full building permit review: a plans examiner checks your drawings against the Ontario Building Code for structure, fire separation, egress, and ventilation; zoning staff confirm your setbacks, height, lot coverage, and total floor area against the by-law; and, depending on your municipality, you may need sign-off on tree protection, stormwater management, or a servicing plan for water and sewer connections. None of that requires anyone's permission beyond the city's own staff, and none of it is discretionary in the way a hearing is, but it is real scrutiny that a poorly prepared application will fail. Budget two to four months for this stage on a clean, complete application; incomplete drawings that trigger multiple rounds of examiner comments are the most common reason that window stretches longer.
The Numbers That Actually Have to Fit
Every municipality writes its own as-of-right envelope, and the only way to know yours is to check your specific zone, but the categories are consistent everywhere: maximum footprint or gross floor area, maximum height and storeys, minimum rear and side setbacks, maximum lot coverage across all buildings on the property, and a required separation distance from the main house. In Toronto, for example, a garden suite is generally capped at 60 square metres (about 645 square feet) and up to two storeys where setbacks and angular plane rules allow. Other GTA municipalities set their own limits, sometimes more generous, sometimes tighter, and those numbers change as councils update their by-laws, so a design based on an old article or a neighbour's project can be wrong by the time you apply. A proper zoning review reads your municipality's current by-law against your actual lot, not a general rule of thumb.
When a Variance Re-Enters the Picture
Not every lot fits neatly inside the as-of-right box, and when it doesn't, you're back in variance territory. The most common triggers are an oddly shaped or narrow lot that can't meet a standard setback, an existing structure like a garage or pool that eats into the buildable area, a request for more height or floor area than the by-law allows, or a heritage designation that layers extra design review on top of zoning. A minor variance application goes to the Committee of Adjustment (or equivalent local body), involves mailed notice to neighbours, and typically adds two to four months plus some genuine uncertainty, since a committee can attach conditions or, occasionally, refuse. It's not a disaster, thousands of variances are approved every year, but it is a materially different timeline and risk profile than a clean as-of-right build, which is why we design to the as-of-right envelope whenever a lot allows it.
Why This Matters for Your Budget and Timeline
As-of-right status affects more than paperwork; it changes what you can promise a lender, a family member, or a tenant waiting to move in. A design that fits the by-law goes from feasibility study to permit application to construction start on a schedule you can plan around, roughly ten to sixteen months door to door for a custom build. A design that needs a variance adds real months of hearing timelines before construction can even begin, plus the professional fees for a planner's report and the small chance the committee asks for changes. That's why the very first thing a competent feasibility review does is measure your lot against the current by-law and tell you, honestly, which category your project falls into, before you spend money on drawings built around a footprint the city won't approve as-of-right.
Getting an Honest Read on Your Own Lot
The fastest way to waste months on a garden suite project is to design first and check zoning second. A proper feasibility review starts with your municipality's current zoning by-law, measures your lot's actual setbacks and buildable area, flags any easements, trees, or heritage constraints, and tells you plainly whether your project fits as-of-right or needs a variance. That answer shapes every decision after it, from floor plan to budget to timeline. Home Garden Suites offers a free, no-obligation feasibility assessment that does exactly this before you commit to design fees, and our design and permits service carries the project from that first zoning check through to a submitted, complete application, whichever path your lot requires.
Related Reading
Ready to plan your garden suite?
Our design-build team is here to help you bring your backyard home to life. Get a free, no-obligation quote today.
Get Free Quote
