Home Addition Permit Drawings
Permit sets for room additions, second storeys and bump-outs. The hard part is where new work meets old, and that is where most plan review comments come from.
structural set, starting fee for up to 500 sq ft. Final pricing is confirmed in writing before work begins.
Drawings your jurisdiction will ask for
- ✓ Existing and proposed floor plans with the addition clearly marked
- ✓ Foundation design for the new footprint, tied into the existing structure
- ✓ Framing plans and connection details at the junction of old and new
- ✓ Load path review, especially for a second storey over existing walls
- ✓ Elevations showing how the addition reads against the existing house
- ✓ Site plan with setbacks and lot coverage after the addition
Frequently asked questions about Home Addition Plans
Do I need structural drawings for a home addition?
Yes for almost any addition. New floor, wall and roof loads have to reach the ground through the existing structure, and the jurisdiction will want stamped calculations showing that path.
Can you work from my existing house plans?
Yes, and it speeds things up. If you do not have them, we can work from measurements and photos, or you can often request the original permit set from your building department.
What if my existing foundation is not strong enough?
We check that first. If it needs underpinning or a new footing at the connection, we design it and show it on the drawings rather than leaving it for the inspector to discover.
Not sure what your jurisdiction requires?