ABC Construction is a Missoula-Montana-based construction company and is a leading Missoula building contractor. No job is too small for Missoula's ABC Construction. If you are in the market for building a deck or bathroom remodel and need a professional Missoula building contractor look to ABC Construction to help you out. ABC Construction is number 1 in Missoula for additions, remodels and custom kitchens and bathrooms.