We had M Butler Custom Homes build our dream home in Dundas Ontario. Advanced Waste Water performed all of the excavation and grading for the job as well. My wife and I are both professional engineers and we recognized that we have very high standards and needed contractors that were not only reliable, but knowledgeable and experienced. The completed work exceeded even our expectations. Mark and his guys were extremely conscientious about the quality of workmanship on our house and it shows. From the precise tiling work, the beautiful detailing of the wood trim, the routing of electrical wiring, the oversized floor joists – the list goes on. Every aspect of construction was done exceptionally well. Working with Mark was a pleasure, he was always open and honest and always found the appropriate solution for any of the inevitable, small problems that were encountered during the design and construction process. Mark’s crews at both M Butler Custom Homes and Advanced Wastewater were always friendly and helpful. We have no hesitation in recommending M Butler Custom Homes and Advanced Waste Water as contractors of the highest quality.