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Custom Architect-Led Builds in Scarborough, Ontario: design, permit and build on a single contract. A typical 700 sq ft unit estimates at $275,000-$368,500 (about $393/sq ft), with $8,000-$14,000 under the City of Toronto fee schedule in municipal approvals and a April-November construction season.

Owners with a difficult lot or a specific architectural intent, where a catalogue plan will not fit. Custom design handles heritage frontages, mature-tree protection, irregular setbacks and grade changes.
Service area
Scarborough, Ontario
City of Toronto
Typical build estimate
$275,000-$368,500
about $393/sq ft in Scarborough
Municipal approvals
$8,000-$14,000 under the City of Toronto fee schedule
quoted separately from the build
Build season
April-November
118 cm snow · -3.9°C winter avg
Frost depth
1.2 m
footing depth, OBC Part 9
Local market
629,941
residents · walkability 52/100
Scarborough's slope toward the Bluffs is a design asset: on Guildwood and Cliffside lots the natural grade drop lets us build a legal walk-out basement suite at the front and still place a garden suite at the rear, producing two rentable units from one permit cycle. City of Toronto garden suite rules apply; Scarborough's wide lots also make basement secondary suites with separate walk-out entrances viable alongside a detached unit. Wide suburban lots with grade changes toward the Bluffs, frequently allowing a walk-out basement suite as well as a rear garden suite.
Lake-moderated winters in Scarborough - 118 cm of snow, -3.9°C average - give one of the longest build seasons in the region (April-November), which shortens the permit-to-occupancy timeline on custom architect-led builds.
Custom means the plan starts from your Scarborough parcel and your programme rather than from a catalogue, so the constraint set - setbacks, coverage, angular plane, servicing capacity - is established before any layout is drawn. Design, permit and construction are held on one contract, so a constraint discovered at the City of Toronto review is resolved by the party that will build it. Fixed-scope pricing is set after the constraints are known, not before - that ordering is what keeps a custom Scarborough build from turning into a change-order sequence.
Everything you need to know about our services.
A typical 700 sq ft build in Scarborough estimates at $275,000-$368,500 - about $393/sq ft, set by $8,000-$14,000 under the City of Toronto fee schedule in approvals, a 1.2 m frost-depth footing requirement and 118 cm of annual snow load. Final pricing follows the site visit.
Related service: Laneway House Design
City of Toronto garden suite rules apply; Scarborough's wide lots also make basement secondary suites with separate walk-out entrances viable alongside a detached unit. Approval costs in Scarborough run $8,000-$14,000 under the City of Toronto fee schedule, quoted separately from construction so the permit stage holds no surprises.
Related service: Secondary Suites
Wide suburban lots with grade changes toward the Bluffs, frequently allowing a walk-out basement suite as well as a rear garden suite. At 52/100 walkability, Scarborough suites usually keep one parking space: enough to clear the zoning review without surrendering the whole yard. We work regularly in Agincourt, Guildwood, West Hill.
Related service: Laneway House Design
Per square foot, modestly - the difference is design time, not construction. On constrained Scarborough lots custom often costs less overall, because a plan drawn to the actual setbacks and coverage avoids the Committee of Adjustment application that a catalogue plan usually triggers.
Related service: Accessory Dwelling Units
Get a free, no-obligation quote from GTA ADU Builders - zoning review, permit drawings and construction for ADUs across the GTA.