We always encourage both architects and homeowners to ask for references for the builder. Talk to the last two clients that the builder has worked with, so you get a real sense of who you’re going to deal with on a day-to-day basis. Also ask for trade references – it’s always a good indicator of how professionally they’re managing jobs.
Consider a builder’s experience. Are you confident the builder will stand by their work in years to come if any issues arise? Usually a builder who has been in the business for a long time is more likely to continue to be in business a number of years after your build.