Our Recommendations
A word about ground prep...... we recommend 4 inches of five eights minus gravel, the same size as your building or larger. Do your best to make it very level and compacted.
Check with your county to see if you will need to get a permit.
Some counties allow up to 400 sq. ft. without one, and some only allow 200 sq. ft. Most towns will allow 120 sq. ft without a permit.