Example concrete slab plan, start to finish

Scaled diagram

Cut list

• Forms – long sides ×22×4 × 12'
• Forms – short sides ×22×4 × 10'
• Rebar – long runs ×9#4 × 12'
• Rebar – short runs ×10#4 × 10'

Permit checkpoints

• Set your state for localized rules

  Permit thresholds, frost-line depth, and fence-height caps vary a lot by state. Pick your state above to tailor this checklist.

• Call 811 before excavating

  You're removing 8+ inches of dirt (slab + gravel). Utilities within 24" of the surface are common. Required by law before digging.

• Confirm setback rules apply

  Concrete pads count as impervious surface — many municipalities restrict how close they can be to property lines and how much yard can be paved.

• Slope 1/8" per foot away from house

  Standard drainage pitch. A perfectly level slab pools water; too much slope and furniture wobbles.

• Consider a thickened edge for cold climates

  In freeze/thaw zones, thicken the perimeter to 12" or dig footings to the frost line so the slab doesn't heave and crack in winter.

• Required approvals to line up

  • Zoning review (impervious-coverage limit, setback) • Building permit if over exempt sqft or supporting a structure • Pre-pour inspection (forms, base, rebar) in most jurisdictions Call your local building department to confirm which of these apply in your jurisdiction — requirements vary city to city.

Rules vary by city and county — always confirm with your local building department. Estimates only, not a permit determination.