
The way in
Separate entrance
A new exterior door cut into the foundation, with the stairwell, guard and drainage designed so the opening does not weaken the wall.
- Foundation opening design
- Stairwell & drainage
- Guards & lighting
- Frost & waterproofing
Legal Basements · Kitchener, Region of Waterloo
Legal basement apartments in Kitchener, designed, permitted and built by one team: the side entrance, fire separation, escape windows and heating for two homes in one house. We check which of zoning bylaws 2019-051 and 85-1 covers the lot and whether its width and servicing allow the unit, then file through the City’s online services portal.

What’s included
A legal unit is a list of code items, and the inspector checks each one. We design to that list, build to it, and book the inspections in the order the city wants them. In Kitchener the package goes to the City of Kitchener Building Division, and it is drawn to that department’s checklist.
The package
Find your situation below. If it’s there, this is the service, and the card underneath is everything you get from our one office.
06 common situations
07
items in your package, all from one P.Eng and BCIN team.
Drawn & stamped in-house
How it runs
Four steps from a bare basement to a closed permit, with the inspections built into the schedule.
We measure the ceiling, look at the windows, the entrance options and the mechanical room, and tell you whether the basement can be made legal and what it will take.
Layout, separations, the structural opening and HVAC are drawn in one office and filed with the municipality. City comments are answered at no extra charge.
Entrance, framing, rough-ins, insulation and rated assemblies go in, inspected at each stage.
Kitchen, bathroom, flooring and doors, then the final inspection and the closed permit.
Case files
Open any file for the scope, the disciplines involved, what we delivered and what the owner came away with.

A compact two-storey suite in a Toronto backyard. Architectural and structural drawings, zoning review and a framing package that makes every square foot count.
Delivered
New living space on a lot the owners already had.
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Structural walls came out and rooms were added to open the plan. Beam and column design, permit drawings and renovation coordination through to final inspection.
Delivered
An open layout where the load-bearing walls used to be.
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A code-compliant second unit with its own entrance, fire separations between the units, HVAC design and the full permit package.
Delivered
A legal second unit that brings in rent and adds property value.
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A new build taken from the client’s sketch to occupancy, with the architectural, structural and mechanical design done by one team.
Delivered
Built to the client’s own plan, with one team answering for every discipline.
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A two-storey garden suite laid out to get the most usable space from the footprint, designed and permitted as a rentable unit.
Delivered
Rental income and a higher property value.
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A dental office converted into a supermarket. Interior renovation, a new plumbing system and fire separations upgraded to the Ontario Fire Code.
Delivered
A dental office reopened as a supermarket, compliant with the Ontario Fire Code.
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A custom covered porch that turns the front of the house into usable outdoor space. Addition design and structural drawings for the permit.
Delivered
More usable outdoor space and added home value.
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Site grading to manage drainage and prepare the land for a new driveway, drawn as a grading plan for the site alteration permit.
Delivered
Drainage handled and the land ready for a new driveway.
Start a project like thisPhoto plates
Additions, basements, kitchens, new builds and commercial fit-outs. Drag a row to scrub through it, or open any photo full size.Tap any photo to see it full size.
21 platesResidential, commercial & new build
The drawing set
Framing schedules, wall assemblies, dimensions and a city review stamp, as issued. Client title blocks are trimmed off to protect the people we drew them for.
Drawing set
Sheets in this set
Sheet title
Existing basement plan
The existing house recorded before any design: beams, joists and bearing walls.
Drawing no.
2 of 5
Service area
From the office we cover the whole GTA, north to Barrie and Orillia, east to Peterborough and Cobourg, west to Kitchener and Brantford, and down through Niagara.
46 across 8 regions
York Region
Toronto & Peel
Halton
Durham
Simcoe & Dufferin
Waterloo, Wellington & Brant
Hamilton, Niagara & Haldimand
Kawarthas & Northumberland
Past the 90-minute line
We've also completed projects in London and Strathroy. Farther out than that? Call (416) 990-9179 and ask.
Permits filed with municipalities including
Before you call
Anything we haven’t answered here, we’ll answer on a call. The first consultation is free.
(416) 990-9179A building permit for the unit, applied for with drawings at Kitchener’s own building department rather than the Region of Waterloo. Kitchener also has a site alteration by-law, and we check it whenever the stairwell for a new entrance changes the grade beside the house. We prepare and file the set and deal with the examiner’s comments.
Only where the lot is inside Grand River Conservation Authority (GRCA) regulation, near a watercourse, a valley or a floodplain. Digging a stairwell down to the basement changes the grade there, and the GRCA permit may be needed before Kitchener issues the building permit. Kitchener also names natural hazards among the limits that can hold a lot to one or two units. So the GRCA mapping can decide how many units the lot takes, and we read it before planning the entrance.
Kitchener’s zoning bylaw permits up to four dwelling units on residential lots that allow a single detached, semi-detached or street townhouse dwelling, and an additional dwelling unit can be inside or added to the main building or in a detached backyard home of one or two units, though lot width, servicing or natural hazards may limit some lots to one or two units. How many of those a given lot can hold is settled lot by lot, so we check its width and servicing before a basement unit goes on paper.
Yes. We take on legal basements across Kitchener, including Doon Pioneer Park and Stanley Park, within ninety minutes of our Richmond Hill office. The first consultation is free, by phone or on site.
Three things to start: property address; basement ceiling height, measured floor to joist; and photos of the basement, the mechanical room and the outside wall where an entrance could go. Send those and we tell you what the City of Kitchener Building Division will ask for before we quote.
One of two. Most Kitchener properties fall under the newer zoning bylaw 2019-051 and about one in five is still under zoning bylaw 85-1, so we confirm which covers your address before reading the unit and parking rules from it. The City of Kitchener Building Division then checks the basement unit against that same bylaw when it reviews the drawings.
It may. Ontario’s O. Reg. 299/19 asks for one space per additional unit, and a tandem space on the driveway is allowed, unless the zoning bylaw needs no parking for the main house or says the unit is to have none. Whether either exception applies depends on which Kitchener bylaw, 2019-051 or 85-1, covers the lot, so we read its parking section and show the space on the site plan for the City of Kitchener Building Division.
Possibly, and the entrance is where the district comes in. Victoria Park is one of Kitchener’s four heritage conservation districts, with St. Mary’s, Upper Doon and Civic Centre, and a new stairwell or door changes the outside of an older house, so we look at the side and rear before the front and ask the City what the district requires. Once the City has answered, we draw the unit and send the full set to the City of Kitchener Building Division.
We apply through the City’s online services portal, which runs on AMANDA, and the same portal then shows the permit’s status and the drawings and documents on file. Each inspection the unit needs, up to the final one, is booked there too, and we keep the file moving until the City of Kitchener Building Division closes the permit.
It can, because the Building Code’s renovation rules for a second unit only apply once a house has stood for five years. In a postwar house, or an older one near the core, those rules accept a 30-minute fire separation around the unit, or a 15-minute horizontal one where interconnected smoke alarms are in every unit and common area. A house in one of the newer Doon or Huron subdivisions that is under five years old follows the rules for new construction, so we confirm the year it was finished before drawing for the City of Kitchener Building Division.
Whether a unit is possible at all: which of zoning bylaws 2019-051 and 85-1 covers the lot, whether it is a lot Kitchener holds to fewer units, and whether Grand River Conservation Authority mapping reaches it. On the visit we measure the basement height and look for a side of the house where an entrance could go. Our director is the broker of record at our sister real estate company, so you also hear what a permitted unit could mean for the price.
Searched & answered
Short answers to the legal basements questions people search most, and the broader topics they lead to.
Not covered here? Book a free consultationA legal basement is a basement apartment that meets the Building Code and the local zoning: a self-contained second unit with its own kitchen and bathroom. The code calls it a secondary suite, and Ontario’s planning rules call it an additional residential unit. Fine Engineering designs and permits these units across the GTA and coordinates the build.
At least 1.95 m, about 6 ft 5 in, under Ontario’s 2024 Building Code, with 1.85 m of clear height allowed under beams and ducts. The measurement runs from the finished floor to the finished ceiling, so new flooring and drywall count against it. Fine Engineering measures the height at the first site visit, before any layout is drawn.
It needs a safe way out, which is usually its own exterior door. In a house that has stood for five years or more, the 2024 Building Code’s renovation rules also accept an exit route through the other unit, as long as the suite gets an extra escape window that opens from inside without tools and the smoke alarms are linked. Fine Engineering works out which route suits the layout.
Yes. Once a house has a secondary suite, its smoke alarms must be interconnected, by wire or wirelessly, so one sets off the rest, and shared spaces need them too. A suite with a fuel-burning appliance, or one sharing a wall, floor or ceiling with such an appliance or a garage, also needs carbon monoxide alarms by its bedrooms. Fine Engineering marks every alarm on the permit set.
For many homeowners, yes. A legal second unit can earn rent and add property value, and because it was built under a permit, it avoids the trouble an unpermitted suite causes when the house is sold. The return depends on how much the basement needs, whether that is more headroom, a new exit or fire separation. Fine Engineering prices that work before any drawing starts.
Usually because the heat reaching the room does not match the heat it loses. A room over a garage, or one with more glass and outside wall, loses heat faster, and a long or undersized duct delivers less air than the room needs. A room-by-room heat-loss calculation and a duct design show where the gap is. Fine Engineering does both for existing houses as well as new ones.
Good to know
In Kitchener the reviewer is the City of Kitchener Building Division. Every Kitchener lot sets its own terms: the spare capacity in the electrical panel and the size of the water service the two units will share decide how much work a basement unit needs.
We walk the site with the survey on a scheduled visit, and combine it with the measure-up where we can, before anything is drawn, then file the legal basements package to the City of Kitchener Building Division’s own checklist.
Kitchener’s housing takes in older homes around the core and Victoria Park with postwar and newer suburban subdivisions in Doon and Huron. A visit in Victoria Park or Westmount starts with the headroom, since a ceiling under the height the Building Code sets means lowering the floor. The bedroom windows come next: one too small to escape through needs a bigger opening and a dug well.
Kitchener lets a lot zoned for a detached, semi-detached or street townhouse dwelling hold up to four units, inside the house, in an addition to it or in a detached backyard home of one or two units. A basement apartment takes one of those places, and how it is planned shapes what can follow.
So we plan for the full count even when you want one unit now. The water service and sewer connection are checked against what more units would need, and the basement layout leaves the stair and mechanical room where they can serve more than one home. On a lot the City holds to one or two units, we draw only what it allows.
With a basement unit, the smoke alarms in both homes are interconnected, wired or wireless, so that one going off sounds them all, and alarms also go in shared spaces outside the units such as a common laundry. The alarms are on the drawings we file, and the City of Kitchener Building Division’s inspector checks them on site.
Carbon monoxide alarms depend on the fuel. Where the unit has a fuel-burning appliance or flue, takes heated air straight from a fuel-burning furnace, or shares a wall, floor or ceiling with a room that has one or with a garage, CO alarms go next to each bedroom in the unit and on any storey of it without one. That holds in an older home near the core as much as a newer one in Huron, so we note every flue on the first visit.
Contact us
Send us the ceiling height and a few photos and we’ll tell you whether the basement can be made legal, on a free first call.
First consultation free(416) 990-9179