Newmarket's Main Street South heritage district contains the GTA's oldest surviving coach houses - 19th-century rear buildings that predate zoning entirely. That precedent helps: heritage staff here are used to reading a rear-yard dwelling as a restoration of historic form rather than as an intrusion.
Building an ADU in Newmarket
We design, permit and build garden suites, laneway homes, basement secondary suites and garage conversions across Newmarket, working from Deep Victorian-era lots along Main Street with rear coach-house precedent, alongside standard Glenway subdivision lots. Newmarket permits additional dwelling units; the Main Street South Heritage Conservation District governs rear-yard work in the historic core. Homeowners here budget $8,000-$13,500 including York Region charges before construction, and we quote that separately from the build so the number is never a surprise at permit stage. Our Newmarket projects run through Main Street South, Glenway, Armitage, Bristol-London, Stonehaven and the surrounding streets. With 87,942 residents and major employers including Southlake Regional Health Centre, Magna International, York Region, tenant demand for a legal second unit is steady year-round, and the May-October building season shapes when we break ground.
