Basement Renovations in North York
From 1960s bungalows in Parkwoods and Bathurst Manor to the larger houses of East Willowdale and St. Andrew-Windfields, we turn North York basements into family space and legal secondary suites.
Four Units Allowed, No Parking Needed
Toronto permits four-unit multiplexes across the whole city, and North York is no exception. Most owners here start smaller, with one secondary suite in the basement. City zoning allows one suite per house, asks for no parking space for it and keeps no registry of suites, so the work centres on the Building Code and the zoning limits.
The zoning limit that matters most is size. A suite can use no more than 45% of the home's interior floor area, but in a one-storey detached house it may fill the whole basement. That exception suits North York, where so much was built in the decades after the war: across the district's core ridings, 38.4% of homes date from 1961 to 1980, and in Parkwoods-O'Connor Hills 88% were built before 1981.
Newer pockets tell a different story. East Willowdale is about half detached houses, and only 31% of its homes predate 1981. Younger basements rarely need lowering; the planning there is about the furnace room, the stairs and a separate entrance. Our office is on Yonge Street, in the middle of the district.
- Licensed & insured contractors
- Transparent, itemized pricing
- Permits & approvals handled for you
- On-time delivery, every project
Basement Costs in North York
Finishing a North York basement with us starts at $55 per square foot, and a legal secondary suite starts at $80 per square foot. For a typical family finish, most budgets fall between $50,000 and $90,000. A legal basement unit usually lands between $80,000 and $175,000, since it carries a kitchen, fire separation, interconnected alarms, a code-compliant exit and the permit process.
Where a North York project sits in that range depends mostly on headroom and access. A postwar basement that has to be underpinned, or a lot that needs a new side entrance cut through the foundation, moves toward the top. A newer Willowdale basement with good height sits lower. Quotes are fixed and itemized after a site visit, with flood protection on its own line.
Basement Work We Do Across North York
The projects North York homeowners most often ask us to price.
- Secondary Suites. A self-contained basement apartment with its own kitchen, bathroom and entrance, built to the Building Code and Toronto zoning.
- Whole-Basement Bungalow Suites. Using the one-storey exception so the entire basement of a Parkwoods or Bathurst Manor bungalow becomes the unit.
- Underpinning and Floor Lowering. Gaining legal headroom in 1950s and 1960s basements where the existing floor sits too high.
- Separate Entrances. New below-grade entrances and stairwells, permitted and drained properly.
- Family Basements. Rec rooms, home offices, gyms and guest rooms for households that want the space for themselves.
- Flood Protection Packages. Backwater valves and sump pumps installed under permit so they qualify for the City subsidy.
North York in Numbers
Census figures and 2026 City rules that matter for a basement unit.
| Homes built 1961 to 1980 | 38.4% (2021 census, five core North York ridings) |
| Renter households | 48.1% (2021 census, same ridings) |
| Units allowed per lot | Four, anywhere in Toronto |
| Parking for a secondary suite | None required |
| 2026 suite permit | $11.53 per m plus $56.33 per new unit; $214.79 minimum |
| Flood protection subsidy | $6,650 maximum per property (work from Nov. 12, 2025) |
North York Rules and Realities
What shapes the design, permit and price of a North York basement.
One Suite Per House
Toronto zoning allows a maximum of one secondary suite in each house, so the basement unit is planned as that single suite.
The 45% Ceiling
A suite is capped at 45% of interior floor area unless it fills the basement of a one-storey detached house.
When a Permit Is Needed
Plumbing or heating work, underpinning, a basement entrance or a suite each trigger a permit. A plain finish without any of those does not.
No Development Charges
Toronto charges no development charges for a second, third or fourth unit on a lot.
Flood Subsidy
Toronto subsidizes up to 80% of a backwater valve installed under permit, plus a sump pump, to a $6,650 property total.
Our Simple 5-Step Process
From first call to final inspection, here is how a North York basement project runs.
Reach Out
Call us or fill out our quick form to tell us about your basement.
Free Consultation
We visit your home, measure the space and talk through layout, finishes, budget and timeline.
Detailed Estimate
You receive a transparent, itemized estimate within 2 to 3 business days.
Review & Refine
We walk through the proposal together until you are fully confident.
Sign & Start
We lock in your start date and handle scheduling, permits and coordination.
North York Basement Renovation FAQs
What does a basement apartment cost in North York?
Can I add a legal basement apartment to my North York house?
Do I need a permit to finish my basement in North York?
Will my 1960s North York basement need underpinning?
Is there a subsidy for a backwater valve in North York?
North York Neighbourhoods We Serve
We build basements and suites in every part of North York, from the 401 corridor up to Steeles.
Recent Basement Renovations
Recent basements from our crews in Toronto and the surrounding region.
