409 Alex Doner Drive, Newmarket, ON L3X 1C6

409 Alex Doner Drive is a beautifully upgraded executive home offering approximately 5,200 sq. ft. of finished living space across three levels, with exceptional space, privacy and flexibility for how families live today. Designed for both everyday living and entertaining, the home features maple hardwood floors, generous living and dining spaces, and a refined kitchen with quartz counters, stainless steel appliances, gas range, coffee and wine station, dual beverage fridges and reverse-osmosis drinking water. Upstairs, four spacious bedrooms include an expansive primary retreat, complemented by the convenience of second-floor laundry. What truly sets this home apart is an exceptionally versatile, fully permitted, self-contained main-floor living space. Easily accessed from inside the home and through its own private entrance, its two generous rooms can function as additional family and play space, a family room and private office, a main-floor bedroom suite, dedicated professional workspace, or independent living for parents, adult children, guests or a caregiver. A kitchenette, full 4-piece bath, gas fireplace, separate electrical panel, laundry rough-in, and sound-dampened, fire-rated separation give the space the infrastructure to function independently when and if desired. The finished lower level extends the home's versatility with a recreation and games area, sound-dampened music room, workshop, food pantry, cold cellar, guest bedroom with ensuite and abundant storage. Outside, 10 ft mature hedges create exceptional privacy around the in-ground pool, raised cedar deck and fully fenced backyard. An attached two-car garage with storage loft and a three-car tree-lined driveway complete this substantial Glenway Estates property. A home with the space to live beautifully today and the flexibility to adapt to whatever comes next.

• Inside Ontario's Greenbelt plan area — Oak Ridges Moraine Conservation Plan

  Greenbelt policy limits new development — confirm permitted uses before planning a build or severance.

  Source: Ontario GeoHub — Greenbelt Designation · as of Sep 2026

• Inside the Oak Ridges Moraine plan area — Settlement Area

  Moraine conservation policy constrains development — confirm this parcel's land-use designation.

  Source: Ontario GeoHub — Oak Ridges Moraine Land Use Designation · as of Sep 2026

Also checked, nothing flagged at this location: flood hazard mapping, conservation-regulated areas, provincially significant wetlands, the Niagara Escarpment plan, areas of natural and scientific interest, rail corridors, hydro transmission corridors.

Screened against public government mapping at this home’s location — simplified boundaries, not a survey, an appraisal or a legal determination. Confirm anything that matters with the authority named.