Add value, space and your own personal style to your home with a customized ADDITION. One of Tri-State's favorite projects is a customers dream addition. The more involved the homeowner the better in the design and planning stages. Our best customer is the one with vision as to what they are looking for in their home addition. If you are at a loss for ideas we can help you along or even do it for you... Our planners will help you find the right size and shape of an addition that will fit your home and your budget.