How much does it cost to build a basement on a existing. Converting an existing cellar will cost around half as much as digging out an entirely new basement. If you have an existing cellar, you could get extra usable floor space at a great price. Basements underneath the garden are cheaper than those directly under the house. The Average Cost to Finish a Basement SmartAsset Installing an unfinished basement will cost 1025 per square foot, while finished basements run you between per square foot. This makes for significant variance in price from one project to another, beginning with a low of 10, 000 and topping off at about 175, 000. Aug 13, 2018Lowering a basement floor costs. The costs to lower a basement floor can greatly vary as there are so many variables involved, including your geographical location, the contractor you choose, the size of your job, the complexity of the work, the pipes beneath the flooring that needs to be removed, how the floor is going to be lowered, your homes condition and so much more. Including a basement as part of new house construction can increase the cost of the house by 1025 or more a square foot for an unfinished basement, or about 10, , 000 or more for an average house; and or more a square foot for a finished basement, or about 35, , 000 or more for an average house; with costs depending on. Jun 14, 2018Either way, you incur added costs with a wet basement ranging from 50 for vapor barriers to about 1, 000 to 1, 500 for a French drain. Also, make sure to get to the bottom of why the basement is damp in the first place. The cost of a basement is between 10 and 35 dollars per square feet. Let's say an average basement is 1, 000 square feet of finished space. So the cost of a basement is between 10, 000 and 35, 000. 10k if you're doing most of the work yourself and up to 35, 000. The average cost to finish a basement is about 6, 500 to 18, 500. Basic costs include hanging drywall, painting, installing crown molding and flooring, which total around 7, 500. The return on investment for refinishing your basement can be as much as 69. The more than you can plan for on paper, the better prepared you are to deal with any surprises that may come up. If you create a budget in a spreadsheet or worksheet, it can also help you keep track of your expenses as you go. The categories you need to add to calculate the cost of building a basement include. The Average Cost of a Basement Hunker When it comes to remodeling a basement, the national average cost for a finished basement ranges a great deal (as much as 50, 000 or higher in some cases). Most customers pay an average of 5, 0008, 000 for their remodeled basement, unless you're adding in luxury features, like a home theater, or building in multiple rooms with highend finishes. Reports on a study carried out to establish the potential benefits and viability of basements in housing. This publication gives details of the effect a basement has on construction costs, land use and profitability using a cost comparison model. This has been updated to 2016 prices.