What's the required foundation depth for building a new home?

The existing 24-inch foundation is too shallow for today’s standards and doesn’t meet Ontario Building Code requirements for a new two-storey home. Modern homes must sit on foundations that reach the frost line, which is about 48 inches deep, and the old foundation likely cannot support the added weight of a second storey. In most cases, the foundation would need to be replaced or significantly upgraded before building. If you’d like more information or want help reviewing your options, feel free to contact us anytime. We can guide you through every step of the process.

In Ontario, standard depth for a structure such as your describing requires foundations to be built to 48” depth (frost line). It’s most cost effective to remove the existing foundation, excavate to the appropriate depth, and build a new footing and foundation. Good luck!