Welcome to Castlewood Ranch...where you'll find the best of new homes in Castle Rock, Colorado in a relaxed rural setting with plenty of room to roam! The many distinctive neighborhoods of Castlewood Ranch offer a desirable selection of new homes in Castle Rock from the area's leading builders, including semi-custom homes on half-acre and full-acre home sites and one-of-a-kind custom residences on acre+ home sites. New homes are currently priced from the upper $200's to more than $1,000,000.