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Garden Suites in Vaughan, Ontario: design, permit and build on a single contract. A typical 700 sq ft unit estimates at $276,500-$370,500 (about $395/sq ft), with $9,000-$16,000 including York Region development charges in municipal approvals and a May-October construction season.

Detached garden suites for backyards without laneway access - permitted under Toronto's garden suite by-law and built as a complete, independently serviced home.
Service area
Vaughan, Ontario
York Region
Typical build estimate
$276,500-$370,500
about $395/sq ft in Vaughan
Municipal approvals
$9,000-$16,000 including York Region development charges
quoted separately from the build
Build season
May-October
141 cm snow · -4.6°C winter avg
Frost depth
1.2 m
footing depth, OBC Part 9
Local market
323,103
residents · walkability 42/100
Vaughan's Kleinburg and rural-edge pockets still run on private septic, and an additional dwelling unit means a septic capacity review before design begins. On municipal-serviced Woodbridge and Vellore lots we skip that step entirely - which is why the same-size unit can differ by six weeks of approval time across one city. Vaughan's additional dwelling unit by-law permits a unit in the main house and a detached unit, with servicing capacity confirmation required from York Region.
Large estate-scale lots in Kleinburg and Woodbridge with private septic in some pockets - servicing review governs feasibility.
A garden suite is a free-standing building in the rear yard, so the governing numbers on a Vaughan lot are rear and side setbacks, the soft-landscaping percentage that has to survive, and the separation distance to the main house required for fire spread. Because it is new construction on undisturbed ground, the footings go to 1.2 m and the roof is engineered for 141 cm of annual snow load - both poured and framed inside the May-October season. Rear-yard access for the excavator is the practical gate: where large estate-scale lots in kleinburg and woodbridge with private septic in some pockets - servicing review governs feasibility, we plan side-yard machine access or crane placement before pricing.
Everything you need to know about our services.
A typical 700 sq ft build in Vaughan estimates at $276,500-$370,500 - about $395/sq ft, set by $9,000-$16,000 including York Region development charges in approvals, a 1.2 m frost-depth footing requirement and 141 cm of annual snow load. Final pricing follows the site visit.
Related service: Our ADU services
Vaughan's additional dwelling unit by-law permits a unit in the main house and a detached unit, with servicing capacity confirmation required from York Region. Approval costs in Vaughan run $9,000-$16,000 including York Region development charges, quoted separately from construction so the permit stage holds no surprises.
Related service: Detached ADU
Large estate-scale lots in Kleinburg and Woodbridge with private septic in some pockets - servicing review governs feasibility. At 42/100 walkability, Vaughan suites usually keep one parking space: enough to clear the zoning review without surrendering the whole yard. We work regularly in Woodbridge, Maple, Thornhill.
Related service: ADU Building Permit
Size is capped by lot coverage and rear-yard setbacks rather than by a single square-footage number, which is why we run a feasibility overlay on your Vaughan parcel first. Vaughan's additional dwelling unit by-law permits a unit in the main house and a detached unit, with servicing capacity confirmation required from York Region. A 500-800 sq ft footprint clears on most serviced lots here.
Related service: Detached ADU
Get a free, no-obligation quote from GTA ADU Builders - zoning review, permit drawings and construction for ADUs across the GTA.