Let's begin with discussing the Design you have in mind.

Let's then turn this into 3D model drawings.

Let's design Materials & Labor Workscopes. 

Let's build a Project Schedule with defined steps.

Let's now discuss scheduling your project.

Let's follow progress with "Gantt Charting".

Let's keep detailed records and pics of the progress.

Let's schedule regular Progress Meetings. 

Let's schedule a walk-through of your project nearing completion.

Let's build a punch-list for remaining items.

Let's agree we are both satisfied and the project was successful.