Gregory Allan Karels, the founder of John Allan Custom Builders has been in the industry for over 14 years and developed this company with a vision of quality, communicaiton, and customer service above and beyond all others. John Allan Custom Builders' goal is to meet every need of our clients and their families. With a relationship designed to build, we see every opportunity as a chance to fulfill the dreams of our clients while strengthening ties that we hope will last a lifetime. With pride in quality and a passion for excellence, John Allan Custom Builders provides personal service that goes beyond all expectations.  Gregory Karels is excited to give you the custom home of your dreams.

John Allan Custom Builders' goal is to become the premier and most sought after custom home builder in Houston. With personality, pride and the highest quality product, there will be no doubt that a relationship designed to build with John Allan Custom Builders will be a rewarding and enduring one.