Greenfield - El Cajon Apartments for rent in El Cajon, CA on ForRent.com: (866) 430-5200 - Availability, pricing and special promotions subject to change daily. Welcome home to Greenfield Apartments located in El Cajon, CA. We offer spacious 2 and 3 bedroom apartments. You will enjoy some of our amenities that include granite countertops, wood and tile flooring, fresh paint, air conditioning, a refreshing pool, dishwasher, microwave and much more.