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Secondary Suites in Scugog, Ontario: design, permit and build on a single contract. A typical 700 sq ft unit estimates at $92,000-$148,500 (about $386/sq ft), with $7,000-$13,000 including Durham Region and septic charges in municipal approvals and a May-October construction season.

Secondary suites carved out of an existing house - main-floor, upper-level or above-garage units built to the Ontario Building Code second-unit standard.
Service area
Scugog, Ontario
Durham Region
Typical build estimate
$92,000-$148,500
about $386/sq ft in Scugog
Municipal approvals
$7,000-$13,000 including Durham Region and septic charges
quoted separately from the build
Build season
May-October
156 cm snow · -5.5°C winter avg
Frost depth
1.2 m
footing depth, OBC Part 9
Local market
21,999
residents · walkability 27/100
Lake Scugog is shallow and its shoreline properties fall under Kawartha Conservation rather than the TRCA - a different authority with its own ADU permit timeline. Owners in Caesarea and on Scugog Island are often surprised that their neighbours one township west deal with an entirely different regulator. Scugog permits additional dwelling units; Lake Scugog shoreline properties fall under Kawartha Conservation review and much of the township is on private servicing.
Lake Scugog waterfront and former cottage lots around Port Perry, plus agricultural parcels and Scugog Island. North-GTA snowfall of 156 cm and -5.5°C winters give Scugog a May-October working season - foundations for secondary suites go in before the ground closes, with interior finishing carried through the cold months.
"Secondary suite" is the Ontario planning term for a second self-contained dwelling inside the existing house, so the review in Scugog turns on the interior - separate kitchen and bath, an exit that does not pass through the primary unit, and rated separation between the two. Because the shell already exists, the schedule is driven by inspection sequencing rather than by weather: rough-in, framing and insulation inspections gate one another regardless of the May-October season. Bill 23 makes up to three units as-of-right on most serviced Scugog lots, so a secondary suite generally proceeds by building permit alone without a rezoning application.
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A typical 700 sq ft build in Scugog estimates at $92,000-$148,500 - about $386/sq ft, set by $7,000-$13,000 including Durham Region and septic charges in approvals, a 1.2 m frost-depth footing requirement and 156 cm of annual snow load. Final pricing follows the site visit.
Related service: Our ADU services
Scugog permits additional dwelling units; Lake Scugog shoreline properties fall under Kawartha Conservation review and much of the township is on private servicing. Approval costs in Scugog run $7,000-$13,000 including Durham Region and septic charges, quoted separately from construction so the permit stage holds no surprises.
Related service: Our ADU services
Lake Scugog waterfront and former cottage lots around Port Perry, plus agricultural parcels and Scugog Island. Scugog is car-oriented at 27/100 walkability, so parking retention and driveway access constrain the footprint more than the zoning envelope does. We work regularly in Port Perry, Caesarea, Blackstock.
Related service: Our ADU services
Usually not. On a serviced Scugog lot, Bill 23 permits up to three residential units as-of-right, so the path is a building permit rather than a six-to-twelve-month rezoning. Scugog permits additional dwelling units; Lake Scugog shoreline properties fall under Kawartha Conservation review and much of the township is on private servicing.
Related service: ADU Building Permit
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