http://dhconstruction.com | Derk Harmsen Construction Co., Inc. (DHC) has been in business since 1979 under its present name and has been involved in the construction industry serving the Houston Area as a general contractor. Quality is priority at Derk Harmsen Construction Co., Inc. Our professionals execute cost effective labor in a timely manner. To ensure your satisfaction, all work is fully warrantable. Please review the information in this section while considering our company. Here you will find letters from our banking, bonding, and insurance companies, as well as references from some of our satisfied customers.