KJN Builders

Delafield, WI — Construction & Trades. ﻿ In 1976, Jim Lewein opened up shop for himself where he honed his skills and grew into a master carpenter and general contractor. In 1991 he renamed the company KJN, after his wife and two children. Since then, our business has grown into a leading construction company for all of Southeastern Wisconsin, and is now being led into the next generation with the help of his two sons, Nick and Jake.