Columns placed inside the wall on 20' to 30'spacing extend from 18 to 36 from the wall into the interior of the building. With the installation of backdrops and player access alleys the effective space for a tennis court is only 114' +/-, some 6' less than most players are accustomed to. The resulting undersized courts have lead to numerous law suits with players claiming injuries for running into columns or walls.
First, letâs look at the cost of actually building a pool. Obviously, the fancier the pool, the more expensive it will be. On average, an in-ground pool can cost anything from $12,000 to $50,000. An above-ground pool may be a bit cheaper.
1 This will cost from $700.00 to $1,000.00 for a basic 150 sq ft pool.  Popping up â Where the water table is high, such as along a coast, hydrostatic pressure can build up beneath your pool. This can force your pool to pop up out of the ground if you need to drain it. Once this happens, your pool has had it.