Check your closing documents, mortgage packet, or homeowner records for any existing copies
Contact the builder or developer if your home was newly constructed
Contact the architect or designer who created the plans
Contact the general contractor who built the home
Contact your local building department, permit office, or records office
Request copies of building permits, plan sets, or approved construction drawings
Search county assessor, recorder, or property records offices for archived plans
Ask your homeowners association if it retains copies of submitted plans
Check with previous owners if you can reach them
Hire a licensed architect, drafter, or surveyor to create new as-built drawings if originals are unavailable
Use a home inspection or measurement service to document the current layout
Verify any copies you receive for completeness, scale, and revision date
Keep digital and paper copies in a safe place for future reference