How much does it cost to build a basement will not be much of an issue anymore, if you become your very own general contractor in building your own base space. Also, you do not have to do all the work, but you can work smart, by coordinating the trades and design scheduling when you are building your own basement.
A more average remodel project of a basement area with 1,500 to 2,000 square feet with trim, an entertainment area, a full bath and other amenities is more likely to cost between $50,000 and $75,000 to complete.
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If you want to build a suite of rooms above a garage, though, the costs can add up quickly. With the additional cost of insulation, electrical wiring, and plumbing if you choose to have a bathroom in the space, you can expect to pay between $170 and $200 per square foot, as noted in 2016 information provided on Angie's List.
Building a structurally-reinforced safe room area inside a basement (whichit can double as a closet, bathroom or utility room) can add $6,660-$14,300 or more to the total cost, depending on size (the number of people expected to take shelter within it), materials used and location within the basement.
Typical Construction Costs of Buildings. Below is a guide to typical construction costs of various buildings per m 2 of gross internal floor area (internal area measured over internal walls and partitions, stairwell openings etc). The costs are typical guide costs for a building of the size stated, constructed to a typical or mid-range specification.