Hours Of Operations Builders First Source Maryland Columbia Builders First Source Hours of Operation and Locations in Columbia, MD 4.8 - 40 votes 1 Locations in Columbia buildersfirstsource.com Builders First Source Hours Category: Home & Garden Builders First Source - Columbia, MD 21046 8965 Guilford Rd, #210(301) 596-7940 View Store Details Explore ColumbiaView More Apparel MarshallsTJ MaxxRoss Dress for LessColdwater CreekBig Lots Sports TargetSports AuthorityNikeDick's Sporting GoodsSkechers Jewelry MarshallsHobby LobbyZalesKay JewelersChico's Recommend For You Burton Snowboards Bulgari C-Town Supermarkets Call It Spring Callaway Golf Carson Pirie Scott Carter Lumber Certain Teed Chamilia Jewelry Champion