The type of pool you choose and how it is installed has a huge impact on the cost. You and I could choose the same model of pool, however my pool costs $19,000 more than yours.
Why? It comes down to the upgrades chosen, delivery costs, ease of access into your yard, slope of your yard, the type of soil the pool is going into and how you finish the area around your pool.
Vinyl Liner
Vinyl liner pools are certainly a great option for lower upfront costs. A pool builder basic installation of a small sized (4.5m x 2.7m) vinyl liner pool can be in your backyard for as little as $15,000 (and as high as $45,000 for a much bigger pool that is a custom shape). An Owner Builder can potentially install a pool kit for under $10,000. The disadvantage of a vinyl liner pool is the overall cost over 10 years, as the liner normally needs to be replaced every 5 to 8 years. This is discussed further in the sections below.
Concrete
The big advantage of concrete pools is the ability to design almost any shape and depth you can think of. Whereas fibreglass pools are 
limited for custom designs, concrete is an open book. This is where the range of costs really gets broad. The same 8m x 4m rectangle shaped concrete pool might cost an additional $10,000 by increasing the deep end depth from 1.7m to 2.4m and upgrading to a Pebblecrete finish instead of plaster.
Concrete pools are generally the most expensive option and can not be bought as a kit. Owner Building is only an option for the experienced. While you might save on the installation as an Owner Builder, if not built correctly, you may end up paying a lot more in years to come fixing problems. A small sized (4.5m x 2.7m) pool with basic installation by a pool builder will start at $21,000 and can be as much as $100,000 if you really go all out on the design and features.
Fibreglass
Any of the installation options applies to a fibreglass pool. The starting point for a basic installation by a pool builder is $16,000 for a small pool (4.5m x 2.7m) and up to $60,000 for a large pool depending on upgrades and site conditions.
Buying a fibreglass pool kit with an assisted installation through a licenced installer will generally save you at least $5,000, and up to $20,000, for a medium sized pool compared to full installation through a pool builder. You’ll save more as an Owner Builder depending how much you do yourself, however we’ve already talked about the risk/reward trade off of this.
