The cost to build a basement is 26000 to 80000. There are a number of factors for basement installation which demand more out of your budget. By using construction estimating software you can break out the foundation and excavating costs as separate line items to determine what the cost per square foot for just the basement is.
The average cost to finish a basement is 32 to 47 per square foot or about 39 per square foot on average.
Basement construction cost per square foot. A new basement will require excavation down to eight feet. In some cases creating a space underneath the existing building is the only way to increase the usable square footage of the building one reason that basement conversions are so popular in central london where opportunities for above ground alterations are minimal. Meaning if you have a basement that is 1000 square feet you can expect to spend about 35000 55000 to renovate your basement. And 30 100 or more a square foot for a finished basement or about 35000 175000 or more for an average house.
10 costs you need to consider for your basement conversion before jumping in feet first. These include the price of extra materials labor excavation and grading as well as your choice of basement style and refinishing. A finished basement will also require a quality drainage system waterproofing and sealing the concrete which is a good idea anyway. Building a basement foundation averages 10 to 100 per square foot depending on land conditions and whether you install a finished basement.
Building a crawlspace versus a basement will save a minimum of 3000 for a new home largely because it requires no concrete floor. A small open plan 500 square foot basement will cost about 20000 while a 1500 square foot basement with three rooms and a bathroom costs around 57000 to finish. Basement construction costs can be double or triple this if the work requires high end material costs. Since the cost can vary greatly youll need to evaluate your unique project in order to get a ballpark figure.
For a finished basement figure about 25 100 per square foot or well over 100000. Basement installation cost depends on excavation grading materials labor size style and finishing. Basements requiring a foundation cinderblock walls concrete floor and moisture prevention techniques run 7000 to 10000 for a house that is 1800 square feet. Firstly each project is different.
Cost is roughly 6 per square foot. The price will go up when you need a separate entrance. Including a basement as part of new house construction can increase the cost of the house by 10 25 or more a square foot for an unfinished basement or about 10000 50000 or more for an average house. The cost to pour a basement averages 33 per square foot which is lower than the cost of adding a room at 86 to 208 per square foot.
However the average cost to renovate a basement is 35 55 per square foot. The cost for just the basement therefore will be the cost of the labor materials and excavation for the foundation as shown on the breakdown of total cost. Most varied between 3000 4000 per m2 for mid range finishes and not including vat or professional fees. This includes digging the basement building materials basement windows and waterproofing.
Cost to finish a basement per square foot. It can cost anywhere from 10 20 per square foot and most spend 13000 30000 unfinished once again depending on the size. With costs depending on location soil conditions the size and shape of the basement area unique shapes with more than four corners cost more the materials.
