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. Swimming Pool, Hot Tub & Sauna Cost Guides. Maintain a Swimming Pool Costs. Most homeowners spent between: 22 - 73. Average cost: 36. Install a Hot Tub Costs. Most homeowners spent between: 57 - 90. Average cost: 18. Repair a Swimming Pool Costs. Most homeowners spent between: 39 - 91. Average cost: . How much does it cost to install a pool? Compare inground swimming pool prices for concrete, vinyl liner, and fiberglass pools. Feb 1, 2018 - Inground swimming pool cost. Concrete pools cost between 5,000 to over 00,000 to install, with the average being around 0,000. Fibreglass pool shells cost between ,500 and 5,000. To have a fibreglass pool installed in-ground costs between 5,000 and 5,000 or more. Freedom Pools Adelaide & SA design and manufacture quality inground fibreglass swimming pools and can design a pool to fit seamlessly into your home. Narellan Pools is Australia's most loved inground fibreglass swimming pool builders, designed to suit any home. Visit us online for a free quote. Swimming Pool construction and design in Adelaide. . fully supported members of Swimming Pool and Spa Association and the Master Builders Association. Leading manufacturer of fibreglass pools with over 30 designs. Inground and above ground fiberglass swimming pools, plunge pools, and lap pools.