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Rental Income Suites in Whitchurch-Stouffville, Ontario: design, permit and build on a single contract. A typical 700 sq ft unit estimates at $271,000-$363,000 (about $387/sq ft), with $8,500-$14,500 including York Region charges in municipal approvals and a May-October construction season.

Homeowners across the GTA who want a second dwelling that pays for itself. We size, permit and build a legal rental suite on your existing lot so the unit meets Ontario Building Code fire separation and egress rules and can be tenanted from the day occupancy is signed off.
Service area
Whitchurch-Stouffville, Ontario
York Region
Typical build estimate
$271,000-$363,000
about $387/sq ft in Whitchurch-Stouffville
Municipal approvals
$8,500-$14,500 including York Region charges
quoted separately from the build
Build season
May-October
149 cm snow · -5.2°C winter avg
Frost depth
1.2 m
footing depth, OBC Part 9
Local market
51,054
residents · walkability 28/100
Musselman's Lake and Preston Lake bring a condition rare elsewhere in York Region: former cottage lots, undersized by modern standards, on communal or private septic beside a sensitive waterbody. Setbacks from the high-water mark, not zoning, are usually what caps the garden suite's footprint there. Whitchurch-Stouffville permits additional dwelling units; the Stouffville urban area is serviced while the surrounding moraine lands are on private well and septic.
A compact serviced town core surrounded by moraine acreage - the servicing line runs through the middle of the municipality.
A unit built to rent is designed around durability and turnover: finishes that survive tenancies, a laundry hookup inside the suite, and metering arranged so utilities are not argued about later. We register the unit properly with York Region so it is a legal second dwelling from day one - an unregistered suite in Whitchurch-Stouffville is uninsurable and unenforceable against a tenant. Whitchurch-Stouffville's 51,054 residents and employers including Markham Stouffville Hospital and Town of Whitchurch-Stouffville set the realistic rent, which is the number the whole build budget should be tested against.
Everything you need to know about our services.
A typical 700 sq ft build in Whitchurch-Stouffville estimates at $271,000-$363,000 - about $387/sq ft, set by $8,500-$14,500 including York Region charges in approvals, a 1.2 m frost-depth footing requirement and 149 cm of annual snow load. Final pricing follows the site visit.
Related service: Our ADU services
Whitchurch-Stouffville permits additional dwelling units; the Stouffville urban area is serviced while the surrounding moraine lands are on private well and septic. Approval costs in Whitchurch-Stouffville run $8,500-$14,500 including York Region charges, quoted separately from construction so the permit stage holds no surprises.
Related service: Our ADU services
A compact serviced town core surrounded by moraine acreage - the servicing line runs through the middle of the municipality. Whitchurch-Stouffville is car-oriented at 28/100 walkability, so parking retention and driveway access constrain the footprint more than the zoning envelope does. We work regularly in Stouffville, Ballantrae, Musselman's Lake.
Related service: Our ADU services
Yes - a second dwelling has to be a legal, permitted unit with York Region before it is tenanted. An unregistered suite in Whitchurch-Stouffville typically voids the property insurance, cannot be enforced under the Residential Tenancies Act, and becomes an open liability at resale.
Related service: Our ADU services
Get a free, no-obligation quote from GTA ADU Builders - zoning review, permit drawings and construction for ADUs across the GTA.