For over 35 years, Rock Bottom Underpinning has been Toronto's leading underpinning company, specializing in creating safe and reliable additional living space or addressing foundation issues through basement lowering. Our experienced and insured team utilizes proven methods to reinforce your foundation, ensuring a structurally sound and waterproof basement. Whether a complex underpinning project or a simple basement lowering, Rock Bottom Underpinning provides exceptional service and top-quality work which does not harm your pocket.