Check local building codes and permit requirements
Call utility locating services before digging
Determine wall purpose, height, and soil conditions
Choose suitable wall type and materials
Mark the wall layout with stakes and string
Excavate a trench below frost line if required
Make the trench level and wide enough for the base
Add and compact a gravel base
Install a perforated drainage pipe if needed
Cover the pipe with gravel and filter fabric
Place the first course of blocks or stones level
Backfill behind the wall with gravel as you build
Stagger joints between successive courses
Use construction adhesive or pins if required by the system
Maintain proper setback or batter for stability
Compact backfill in layers as you go
Install geotextile fabric to separate soil and gravel
Add drainage stone behind the wall
Finish the top with cap blocks or coping stones
Grade the soil above the wall to direct water away
Inspect alignment, level, and drainage before finishing
Plant or landscape around the wall after completion