Southwest Roanoke County Real Estate, zip code 24018.  Southwest County Roanoke is probably the most popular buying destination for Roanoke Virginia Home buyers.  Southwest Roanoke County is more commonly identified as zip code 24018 for people looking for real estate West of US 220 and South of Salem Virginia.    SW Roanoke County has several things going for it but the major draw for Southwest Roanoke is the School Systems.  Roanoke County Schools are desirable as a whole but many home buyers have a special desire for the schools in SW Roanoke County VA.  The two high schools are Cave Spring High School and Hidden Valley High School.   All of Southwest Roanoke County was served by Cave Spring High School until 2002 when Hidden Valley High School opened in August.  Now Southwest Roanok... 07/01/2012