Homes & Land of Middlesex, Union & Mercer Counties, NJ gives you access to Middlesex homes for sale and real estate listings. You can search by property type, including residential homes, houses, land, lots, acreage, condos and multi-family. Click the photos to see details for each home, including photos, bedrooms, baths, price and description. For more information on a property, just ask the real estate professional or broker shown on the listing.