Check local building codes and permit requirements
Choose a level, well-drained location near the house
Measure and mark the kitchen layout
Plan utilities for gas, water, electricity, and drainage
Design the layout for grill, sink, storage, and prep space
Select weather-resistant materials
Clear and prepare the site
Pour a concrete slab or build a stable base
Build the frame or base structure
Install countertops
Install the grill and other appliances
Connect gas, water, and electrical lines
Add cabinets, drawers, and storage
Install lighting and ventilation
Seal all surfaces and joints
Add backsplash and finishing materials
Test all appliances and utility connections
Inspect for safety and code compliance
Add seating, shade, and accessories