Check local building codes, permits, and accessibility requirements
Measure the stair rise, run, width, and landing space
Determine the ramp slope and total ramp length needed
Choose the ramp location and verify enough space for landings
Select materials for framing, decking, fasteners, and handrails
Mark the ramp layout from the top landing to the bottom grade
Build a stable foundation or support posts as required
Construct the ramp frame with proper slope and cross-bracing
Install the ramp deck surface with slip-resistant material
Add top and bottom landings if required
Install handrails and edge protection on both sides
Check for smooth transitions at the top and bottom
Secure all connections and verify structural stability
Inspect the finished ramp for compliance and safety
Test the ramp for load capacity and safe use