The most expensive part of building a pool is typically the excavation and labor, which can account for 25% to 50% of the total project cost. This is particularly true for inground pools that require significant excavation, potentially including the rental of large equipment, and extensive construction labor. In contrast, above-ground pools are generally less expensive as they typically do not require excavation and can be installed much more quickly. Concrete in-ground pools are among the most labor-intensive options.

A 24-foot diameter pool is the most popular size for a round above ground model, while 15 by 30 feet is a common choice for oval-shaped pools. However, you'll find round sizes everywhere between 8 and 33 feet. Oval pools range up to 21 by 41 feet but can be customized to stretch much longer. Choosing the right size will come down to where you can level your yard and how many swimmers plan to use the pool at a given time.

Installing an infinity pool takes up to 12 weeks. It can take as long as 20 weeks if you have a complex design, are building a pool in an inaccessible area, or face weather-related construction delays. Either way, this is a big job that requires a lot of time and labor to get it right. Pool construction is not a job that should be rushed, as poor installation can lead to expensive recurring repair costs. 

Some pool professionals recommend adding an extra layer of comfort and protection between your pool and the vinyl liner. Made from a range of plastic blends, these liners can absorb moisture, allow the pool liner to breathe, and act as an extra barrier for pests, burrowing animals, and mildew. They also provide an extra layer of comfort for swimmers.