Because basements are usually below ground level, water seepage and moisture issues have to be resolved before construction can start. Prior to creating a project bid, most contractors will inspect the area to check the interior floor and walls for dampness and make sure the exterior of the foundation is in good shape. Depending on how watertight the basement and foundation are, it may be necessary to protect the basement from future water damage after it’s finished, often through the installation of sump pumps. This work can cost anywhere from $700-$3,000, depending on what needs to be done. Learn more about basement waterproofing. To help prevent moisture problems, homeowners can clear downspouts and gutters of debris to ensure that they help keep moisture away from the foundation.

• Game tables eat up a lot of square footage. For a small pool table (3½ feet by 7 feet), you need a clear space at least 11½ feet wide by 14½ feet long to play comfortably—if you buy the shortest cues, that is. A tournament-size pool table (4½ feet by 9 feet) or a 5-by-9 Ping-Pong table needs even more room. Unless you're positive you'll use it a lot, consider skipping a single-activity table.
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.
Sourcing supplies, clearing debris, and doing prep work can all help you save on basement costs. Consider what skills you have and talk with your contractor about what will shave money in each area. You may have the tools and strength to demo walls, which can save you several hundred dollars. Sourcing the materials for the pro takes this task off their labor time and saves you money. Doing prep work and finish work is also a way to cut down on total cost. Painting the walls yourself at the end of the project could save you hundreds of dollars. Negotiate all these aspects before signing your contract.
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