Plan the wall location and dimensions
Check local building codes and permits
Mark the wall line on the ground
Excavate and prepare the foundation area
Install formwork if needed
Pour and level the footing or foundation
Let the foundation cure
Lay the first course of blocks, bricks, or framing
Keep the wall straight, plumb, and level
Add reinforcement as required
Continue building up the wall in courses or sections
Install openings, supports, or anchors as needed
Fill joints or secure fasteners as required
Finish the top of the wall with a cap or top plate
Inspect the wall for alignment and stability
Apply any required sealant, insulation, or surface finish