The Oak Ridges Moraine Conservation Plan covers Richmond Hill's northern third, and on those Jefferson and Oak Ridges lots the tree-protection and grading requirements routinely cost more than the ADU's foundation. We price a moraine site and a Crosby site as two different classes of project.
Richmond Hill Garden Suites & Secondary Suites
Richmond Hill permits additional dwelling units subject to Oak Ridges Moraine Conservation Plan constraints on the northern third of the town. The practical starting point in Richmond Hill is the lot itself: Sloped and treed lots along the moraine where site grading and tree protection drive cost more than the building itself. That is what decides whether the answer is a detached garden suite, a laneway house, a garage conversion or a basement unit. We serve Oak Ridges, Bayview Hill, Mill Pond, Jefferson, Crosby and the neighbouring areas. Permit, review and regional charges in Richmond Hill typically total $9,000-$15,000 including York Region charges. With a population of 202,022 and employers such as Mackenzie Health, Compugen, State Farm Canada in the local market, a legal second unit rents quickly - and the April-November working window means design and permitting should start well before you intend to build.




