This online basement remodeling cost calculator is here to give you a basic estimate for finishing your basement. Finishing your basement includes many different variables, so it’s a good idea to get a good idea of the cost as early as possible. Circumstances, materials, and the like can change over time, but a good “ballpark” estimate will give you a basic idea of where you’re starting from. We provide you with this calculator so you can get a better understanding of roughly what finishing your basement will cost.


Installing a bathroom in a basement costs more than installing a bathroom above ground. Costs can range from $2,500 to $5,000 on average, depending on the number of fixtures and whether the plumbing must be installed from scratch or if it’s roughed in already. Basement plumbing requires special considerations to ensure proper drainage and tie-in with the main sewer line, which may not be deep enough to allow the basement bathroom plumbing to use gravity the way above-ground plumbing does. Virgil Miranda’s Construction subcontracts all plumbing work. Miranda says that sometimes the toilet alone in a basement can cost up to $2,500 because sometimes homeowners need to invest in a toilet that does not use gravity but instead a macerating function to grind waste down to prevent clogging. Miranda estimates that each bathroom fixture in a basement costs $800–$900 on average, so a full, three-piece bath could cost $3,000 for the fixtures alone. Adding a kitchenette or wet bar sink adds more to overall refinishing costs. In addition, some basements require a French drain with one or more sump pumps, which can cost up to $10,000 on average, depending on how much ground the drain covers.
Once you’ve completely waterproofed and your basement is protected, you can move on to the room’s interior. Choosing the right flooring is an important part of making your finished basement truly your own. The type of flooring material you choose will definitely factor into your final price, so choose wisely and pick the floor that’s best for your finished basement.
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