Everyone here has given great suggestions! There are many newer homes on the market in the Bristow/Gainesville/Haymarket area which is a short commute to Manassas. There are some great neighborhoods that offer amenities your family may enjoy such as pools, walking trails, and dog parks, newer schools, and proximity to shopping and restaurants.
Good luck on your relocation and enjoy the area! I am a Bristow resident and love where I live!... more