I built some Multifamily Townhouses recently. Here's all the things I had to gather before I was approved for the permit. Keep in mind some of this is both project and state specific.
Pre-BUILDING STEPS
- permission from the planning and zoning desk
- topographic map from a civil engineer
- Building plans and elevations from an architect
- Site plans from Civil Engineer. All wet utilities and points of connection. Also a drainage report.
- Structural plans and calculations from a structural engineer, foundation with footing details, all joist and rafter sizes and spacing, and roof framing.
- Trusses from a truss company, then to be approved by the structural engineer with truss calculations to be done.
- Indoor sprinkler plans with hydraulic calculations and manufacturer spec data sheets. I had to go to the town and get a water flow test before this as well.
- Gas utility meters, needed to figure out where these would go.
- Soil report from a geotechnical engineer. Structural engineer needs to sign off on this too.
- HVAC drawings from HVAC contractor. CA energy code Title 24 consultant needed to approve of these.
- Electrical layout plan from an electrical engineer, both inside and outside electrical.
- Sections from architect, Longitudinal and Transverse.
- And last but not least the CA energy code, Title 24 Part 6. Will be different in your area but most likely needed. This is a consultant about the energy the building will use.