I'm looking to add either a large single-car or a two-car garage on the main level of my house, which currently has a walkout basement. I'm wondering if I can construct it with livable space, a patio, or a crawl space underneath. What are the pros and cons of each option? Any advice before my wife and I start contacting contractors would be greatly appreciated!
3 Answers
In my experience, it’s absolutely possible to add a garage with a livable space, patio, or crawl space beneath. Just know it’s going to raise the cost and complexity of the project. For instance, a full basement under the garage can run you a lot, upwards of $60k, depending on your specific needs and local construction costs. A solid foundation is crucial, especially with frost depth in mind. Definitely worth discussing with an architect or local builders to find the best fit for your situation.
Yes, you definitely can add a garage with space below, but be aware of the trade-offs. A livable space underneath is great for value but comes with significant costs for insulation, heating, and meeting building codes. A patio option is cheaper and provides usable outdoor space, though it won’t add as much value when reselling. The least expensive route is a crawl space, but keep in mind it’s mostly just for storage and might require drainage work due to your existing basement. Getting a structural engineer’s opinion can save you from headaches later on!
Exactly! Plus, if you’re on a budget, it might be worth building a small addition alongside the garage to maximize your usable square footage without incurring excessive costs.
Before you dive into planning, it's a good idea to consult with an engineer or architect first. They can help assess the feasibility based on your house's structure and the local building codes.

Right, and if you’re in an area where space is tight, these kinds of designs can make a huge difference in maximizing your property without compromising on outdoor area!