Plan showing foundation details, general dimensions, wall cross sections with heights, dimensions and spacing of footing, information on insulation, drainage, type of gravel used, backfill height, etc. Use of the basement (crawl space, rooms) must be indicated beside the plan, together with the dimensions of desired openings (windows and air vents). This plan is used to verify the project’s compliance with the National Building Code.For all new foundations under an existing building, the floor details, such as the location of the main floor beam, must be provided. The final height of the building, once completed, is also required.Please note that for an accessory building exceeding 55 m2 (592 sq. ft.) in a municipality, the foundation must be anchored at a ground depth of 1.25 m (4 ft.). Foundation plans drawn up by a provincially registered engineer will be requested if the desired foundation is unconventional (e.g. concrete slab). (Example)