My brokerage held a fall breakfast meeting last week, and one of the speakers was Marcia Wallace, the City of Ottawa's General Manager of Planning, Development and Building Services. She covered a lot of ground on how Ottawa is growing.
The part I thought was most important to share with you is how the City is changing its approach to housing, density and what can be built on an ordinary lot. Those changes matter whether you own a home now or plan to buy one in the next 5 or 10 years.
What changed with Ottawa's new zoning by-law?
The old by-law sorted land by the type of housing on it, so a zone told you whether a lot could hold a detached house, a semi, a townhouse or an apartment building. The new one, By-law 2026-50, looks at the building instead: its height and size, its distance from the property lines, the number of units it holds and its location in the city.
One of Wallace's points was that the City doesn't need to be as strict about how the inside of a building is divided up, since what matters now is how the building affects its lot and its neighbours. For a homeowner, that means more room to change a property over time.
As for timing, Council approved the by-law in January and passed it in March. Because 25 appeals were filed, the Ontario Land Tribunal put only the parts that weren't under appeal into force in July, backdated to March. Where a part is still under appeal, the stricter of the old rule and the new one applies for now, so if your plan with a piece of property depends on one of those parts, check on it before you count on it.
What does N1, N2 and N3 zoning mean in Ottawa?
The old R zones are now N zones, short for Neighbourhood, numbered from N1 to N6, where a higher number allows more homes on a lot. N1 to N3 are the low-rise zones most houses fall into, while N4 allows four-storey buildings and N5 and N6 are mid-rise and high-rise.
Every zone code has two parts, which you can see in a code like N2B:
| Part of the code | What it controls |
|---|---|
| N2, the zone | How many units the lot can hold, and how tall the building can be |
| B, the subzone | How wide the lot has to be, and how far the building has to sit from each lot line (the setbacks) |
The letter is the subzone, which runs from A to F on a scale from the most urban pattern to the most suburban one:
That's why two lots zoned N2 can have different options, since an N2 lot in an older central neighbourhood and one in a newer suburb usually carry different letters, which changes what size building fits on that lot.
How many units can you build on an Ottawa property?
The new by-law allows more units on ordinary lots than most people expect. How many depends on the zone and the size of the lot, because density is now counted per 100 square metres of lot area. The table below shows the three low-rise zones, using a 400 square metre lot as the example (roughly 12 by 33 metres, a common size in older parts of the city).
| Zone | Units per 100 m² of lot | Max per building | Example: 400 m² lot |
|---|---|---|---|
| N1 | 0.8 | 4 | 4* |
| N2 | 1.5 | 6 | 6 |
| N3 | 2.5 | 12 | 10 |
Two more rules regarding those numbers: a lot on a well and septic system is limited to two units, and in every zone, a unit in a coach house counts toward the maximum.
Some of this was already allowed without a rezoning, which planners call "as of right". The new by-law widens that list in ordinary neighbourhoods by measuring the lot instead of naming the building type.
I know it may be a little hard to follow, but just one more thing: none of that means the maximum fits on every lot in the zone. The lot size sets the count and the subzone sets the lot width and setbacks, after which the Building Code, water and sewer capacity, heritage rules, easements and any exceptions for that particular lot all get a say. So treat the zone as a ceiling, because zoning only tells you what may be permitted, not what's guaranteed to be allowed on that lot.
Can you add a basement apartment or coach house?
I'm writing a separate post on additional units, so I'll keep this short. Basement apartments, coach houses and units above garages are a big part of the City's plan, which is why the new by-law makes room for them. Having the space is only the first step, though, since the unit still has to meet the zoning rules, get its permits and pass the Building Code.
This matters most when you're buying a home that already has a basement unit, because a listing that says "income suite" tells you the unit exists without telling you it's legal. Ask for the permits.
Do you still need parking?
The new by-law no longer sets a minimum number of parking spaces for housing anywhere in the city. For decades, zoning told builders how many spaces they had to provide, which decided the shape of a lot of projects.
New buildings will still have parking where buyers and tenants want it, although in some areas, mostly near transit, the by-law can cap how much parking a project provides. If you're buying near an LRT station or a main street, I'd expect the new buildings around you to have less parking than the ones already there.
How do you check the zoning of an Ottawa property?
Start with geoOttawa, the City's map tool: turn on the layer called "New Zoning By-law 2026-50" and search the address. You'll see the full zone code, meaning the number, the letter and any suffix or exception. Read past the number to the letter and check for overlays and exceptions, because those can change the rules for that lot.
If your decision to buy depends on a specific plan, such as adding units, confirm the plan before you rely on it. The City's Development Information Officers are available to answer any property-specific zoning questions. My advice: anything bigger than a basement unit should be a conversation with a planner or an architect before you assume it's possible.
What could be built next door to you?
If you plan to own a home for 10 years or more, the zoning of the lots around you matters almost as much as your own. In geoOttawa, zoom out to the lots on either side, the block behind and the nearest main street, which usually carries a higher zone than the streets behind it. Land near an LRT station can be different again. If there's a tired plaza around the corner, look up its zoning to find out what could replace it.
None of that tells you whether anyone plans to build near your property of interest. This is where a second map comes in. The City publishes Development Growth Ward Maps as part of its Housing Approvals Dashboard, one for each ward. Every project gets a letter on the map, with a list underneath giving its address, its number of units and its stage, either in the planning pipeline under review or construction ready with a permit issued. Here's the one for Ward 14 as an example:
It's a snapshot, so not every project on it will get built, although it does tell you which ones have moved past the idea stage. You should look at both together, since the zoning map shows what a block could become while the growth map shows what's already on its way.
What does the new zoning mean if you're buying a home?
There are two sides I'd weigh, whatever you're buying for. The first is the property itself: its full zone code, how many units the lot could hold, its height and setback limits and any easements, exceptions or heritage rules. Even if you never build anything, some of that potential ends up in the resale value.
If a listing prices in that potential, such as room for four units, confirm it with the City before you pay for it. A buyer paying extra for "development potential" or "rental potential" is paying for something that may or may not exist.
The second side is everything around the property, from what the neighbours' lots could become to a main street or a higher zone a block away and anything nearby that's already approved or under review.
Why is Ottawa changing its zoning?
Wallace's most important point was that Ottawa is planning for a lot more people and a lot more homes to hold them. Part of the City's answer is to let existing neighbourhoods take on more housing over time, instead of only relying on new subdivisions at the edge (she explains the plan is to do both: expand and densify).
As that plays out, more of this lands on ordinary homeowners, since it shapes what you can do with a property you own and how the street around a house you buy might change while you live there.
If zoning, rental potential or future development is part of why you want a property, get those answers before you make an offer, or make them a condition of your offer. I'm available too, as an Ottawa REALTOR® who knows all of its neighbourhoods, so reach out if you need a hand.
Buying with an eye on zoning?
Let's look up the property and the block around it before you offer.