Pool security covers cost ,500–,800 in most cases. Most heat pumps cost ,000–,500, plus additional cost for electrical hookup. Most pool dealers charge ,300–,500 to tile a fiberglass swimming pool on the waterline/perimeter. Retaining walls can get very expensive. Although its initial cost is normally ,000-0,000 less than a fiberglass or concrete pool, its long-term cost is often much more. With the average liner replacement costing around ,000, one can easily make up the price difference within 10-15 years after the pool's installation. Buying a Fiberglass Pool is much like buying a car. The base price of 5000-5000 is just a starting point of your costs, features & add-ons. The cost of an inground pool is typically understated, with the average cost starting around 5000, which doesn't account for features, add-ons & maintenance. Jun 22, 2016 - Fiberglass pool prices will vary depending on the size you choose. If you opt for a medium-sized fiberglass pool with installation, it could run somewhere around 0,000, but again, it depends on where you live. If you go with a self-install, the actual pool shell most likely runs somewhere between 0,000-0,000.