If you are looking to downsize a popular option is a low-maintenance bungalow style home.  These homes are often in what's termed Adult Active Lifestyle communities.   These communities usually have a vibrant social community, special events and resort type amenities, like pools, putting greens & tennis courts.

Another great feature of these homes is the low maintenance - the property management usually provides all of you exterior maintenance for you - including landscaping, lawn care & shoveling to the door.  

This is a list of properties in Brampton, but there are also similar communities in Markham ON, Ajax ON, Bobcaygeon ON, Barrie ON, Uxbridge ON, Hamilton ON & Newcastle ON among others in the GTA