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Real Estate Investors in Clarington, Ontario: design, permit and build on a single contract. A typical 700 sq ft unit estimates at $270,000-$362,000 (about $386/sq ft), with $7,000-$12,500 including Durham Region charges in municipal approvals and a May-October construction season.

Investors adding a income-generating unit to an existing rental property. We start with a feasibility and lot review that states what the zoning allows, what the build costs and what the unit rents for before you commit capital.
Service area
Clarington, Ontario
Durham Region
Typical build estimate
$270,000-$362,000
about $386/sq ft in Clarington
Municipal approvals
$7,000-$12,500 including Durham Region charges
quoted separately from the build
Build season
May-October
142 cm snow · -4.8°C winter avg
Frost depth
1.2 m
footing depth, OBC Part 9
Local market
101,427
residents · walkability 34/100
Clarington is four separate towns under one municipal roof, and Darlington Nuclear anchors the local economy with a refurbishment workforce that has driven demand for secondary suites in Courtice and Bowmanville. Contractor-tenant demand here is measurably steadier than anywhere else in east Durham. Clarington permits additional dwelling units across its four urban areas, with Ganaraska and CLOCA conservation review on valley-land properties.
Four distinct serviced communities - Bowmanville, Courtice, Newcastle, Orono - set in agricultural land, each with its own lot pattern. North-GTA snowfall of 142 cm and -4.8°C winters give Clarington a May-October working season - foundations for real estate investors go in before the ground closes, with interior finishing carried through the cold months.
An investment ADU is underwritten before it is designed: the build cost, the $7,000-$12,500 including Durham Region charges in approvals and the achievable Clarington rent decide the unit size, not the other way round. We price the feasibility stage as a standalone deliverable so the numbers can be tested against your Clarington parcel before any commitment to design. A legal second unit changes the appraisal basis of the property, which is the return most owners underestimate next to the monthly rent.
Everything you need to know about our services.
A typical 700 sq ft build in Clarington estimates at $270,000-$362,000 - about $386/sq ft, set by $7,000-$12,500 including Durham Region charges in approvals, a 1.2 m frost-depth footing requirement and 142 cm of annual snow load. Final pricing follows the site visit.
Related service: Our ADU services
Clarington permits additional dwelling units across its four urban areas, with Ganaraska and CLOCA conservation review on valley-land properties. Approval costs in Clarington run $7,000-$12,500 including Durham Region charges, quoted separately from construction so the permit stage holds no surprises.
Related service: Our ADU services
Four distinct serviced communities - Bowmanville, Courtice, Newcastle, Orono - set in agricultural land, each with its own lot pattern. Clarington is car-oriented at 34/100 walkability, so parking retention and driveway access constrain the footprint more than the zoning envelope does. We work regularly in Bowmanville, Courtice, Newcastle.
Related service: Our ADU services
A legal, permitted second unit changes how the property is appraised in Clarington - it is valued partly on income rather than purely on comparables. An unpermitted suite does the opposite: it is discounted or excluded entirely, and it surfaces on every purchaser's title and insurance review.
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.