Basement Extension

We are looking to add square footage to our basement by extending to the back of the house. It's about 5ft deep and 25ft wide. The 1st level of our deck is 7ft deep. We would then expand the width of the 1st level of the deck to the full size of the house. There is an extention of plumbing for the garden hose.

We would need to have proper drainage for the basement extension as the deck will be on top of it. The hvac would have to be expanded and proper insulation. The basement is currently finished. Outside of insulation and hvac work, we can do all interior work. We just want to make sure that everything is structurally sound and waterproofed well. We would like to have the deck expanded as well.

We are hoping that all permits and architectural drawings wold be included in the project. If we can save considerable money out of our budget, we could potentially do the leg work for permits but it is not our preference.

We have a semi detached raised bungalow in Mississauga. We are looking for some ideas of the cost of this whole project.