ADU Permit Drawings and Plan Sets
Complete permit sets for accessory dwelling units: architectural, structural and MEP, sealed and ready for your building department. Most ADU sets run 5 to 10 business days.
architectural set, starting fee. Structural from $1,699 where required. Final pricing is confirmed in writing before work begins.
Drawings your jurisdiction will ask for
- ✓ Site plan showing the ADU location, setbacks and lot coverage
- ✓ Floor plans, elevations and building sections
- ✓ Foundation and framing plans with calculations
- ✓ Electrical, plumbing and mechanical layouts for the new unit
- ✓ Utility connections to the main dwelling or the street
- ✓ Energy compliance documentation where the state requires it
Frequently asked questions about ADU Permit Drawings
What drawings do I need for an ADU permit?
Most jurisdictions want a site plan, floor plans, elevations, sections, structural plans with calculations, and MEP layouts. Some also require an energy compliance form. We confirm the exact list with your building department before drafting.
Do I need a structural engineer for an ADU?
Almost always for a new detached unit, and usually for a garage or basement conversion too, because you are changing loads and creating a dwelling. The calculations are sealed by a licensed PE.
How long does an ADU permit set take?
Typically 5 to 10 business days for the drawing set, depending on size and how many disciplines are involved. Plan review at the city is separate and usually takes longer than the drawings.
Not sure what your jurisdiction requires?