Slab Foundation

Technical Design

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Build Procedure

See Seed Home v2 Build Instructions

Costs

• $5-7/sf - [1] [2][3]
• A slab foundation already includes a floor - so cost would cover two elements of the building
• Although a concrete foundation can get expensive in areas with deep frost lines, a frost protected foundation only needs to be 18 in deep. This means that the cost of a slab foundation in the South and Midwest would be about the same.
• Concrete foundations can support 1 or 2 stories without added cost
• House foundation - $7 - [4]
• National average $9 - [5]

Cost

• $7300 to $8800 for 1000 sf - [6]. Excavation and gravel not included.
• Needs gravel - $1k. $600 for 1000 sf 6" deep at $20/yard [7]
• Grading. 60c-$1.25/sf prep - [8]

Comparison

• Seed Home 2 budget costs $3111 for foundation per module - [9] - so $12444 for 1000 sf. Because this includes the floor. Concrete slab is both foundation and floor.

Estimates

Estimate Request Form

• Slab Foundation Estimate Request