Learn more about the average cost to build a sauna, ... If you choose to add an indoor sauna to your home, you could pay around $3,000, but costs for an indoor custom sauna can be north of $9,500.

There are several ways to build a sauna, from converting an indoor space with a ready-made kit, to building a custom sauna from the ground up. 1. Prepare the Space.

DIY sauna kits or precut packages are great for beginners, so explore some of those options if you don’t want to build a ...