Choosing your builder is one of your most critical decisions. If you pick a skilled craftsman who is properly qualified to do the job it will make the experience stress-free and exciting.
But hire an incompetent fool who doesn't know a hammer from a hamster and your housing project could be less than enjoyable.
That's why you need to do your homework.
Create a list of builders you would consider using. Ask your friends and family for recommendations.
Ask these builders where you can see recent examples of their work and and speak to the people who employed them. Ask questions of the people such as; was the quality of the work up to scratch? Was it completed on time? Was the builder easy to work with?