RJ Custom Builders recommends interviewing at least 2 or 3 builders for your project. No matter what the size of the project is, be sure to ask as many questions as possible. You will be relying on that certain contractor to do the right job so you must feel comfortable with the relationship you have with that company. Don’t be afraid to ask the tough questions. Some of these might include: Do we get a written estimate, do we see the contractors invoices, do we receive job cost reports, can we have a list of referrals . Be sure to get a signed contract.