Determining the cost of building a basement

If your new home has a basement, there are several ways to estimate the cost of completing it. Although basements are one of the least expensive parts of a house, when planning according to the square meter, finishing can represent a significant investment. Follow a few simple rules to determine how much it will cost to build your basement.


  1. Calculate the cost of excavation. You might not realize that digging to build a basement is quite expensive. The required investment depends on the type of soil that has to be removed. If the construction site has many rocks, the price will be higher. Request for the excavator to evaluate the area and give you a cost per square yard. Make sure they include your equipment, transportation fees and charges for the supports.
  2. How much concrete do you need poured for the basement? Calculate the amount of concrete you need in cubic yards. This is determined by the thickness of the wall that will be poured. The minimum wall thickness is 8 inches for a standard construction or 10 inches thick if your house has stone applied to the outside layer. Basement ceilings 8 feet tall need a concrete wall that is 9 feet thick.
  3. Add in the concrete foundations on which your walls rest which are 2 feet long and a foot wide under all portions of your walls. Check with your local building code inspector to see if you need longer bases in your area.
  4. Find the volume of concrete needed for the floor which will have a thickness of 4 inches. Add this to your previous cost for concrete calculations.
  5. Calculate how much steel reinforcements are needed to give your basement walls strength and integrity. All walls must contain rebar. Find out how much it costs to install a vertical reinforcement, 94 inches long, every two linear feet into the basement walls and plan to use nine horizontal rebar levels. Add connections to your calculations bars.
  6. Finalize your calculations for computing rebar rods that pass through the ground in both directions at the centers of two by two feet. Like before, add the connections you need to ensure the bars.
  7. Let the proper technician stabilize the concrete floor with a minimum of 3 inches before pouring. In addition, depending on the code, you may have to use sand to fill around the basement to prevent movement. The sand provides 100 percent compaction and is regularly needed in areas where the soil is in constant motion.
  8. Check the price for installing drainage tile around the perimeter of your basement and add the cost of a bucket sink to filter the water away from your foundation. If you are in an area where you should use sand to fill, calculate the price to install rock on the tile drains to prevent the sand from seeping into the holes and create obstructions.
  9. Add the cost of hiring experienced workers to help you build your basement. Pouring the concrete for the wall is labor intensive, as it tends to dry quickly and it does, it cannot be fixed.