cost of concrete house slab
1 A slab foundation for an average 1,600- to 1,800-square-foot family home might cost about $7,000-$16,000 or more, while a slab foundation for a 3,000- to 4,500-square-foot home might cost $13,000-$40,000 or more.here are three basic types: a concrete slab on grade (least expensive); a crawl space foundation with short walls supporting the house; or a full basement foundation (most expensive) with 8'-10' walls. Which type is best for a specific location depends on soil and groundwater conditions.