If you want your pool built quickly, opt for fiberglass. Many concrete pools are built using the gunite process and can take approximately three to six months to install, from the permit process to finishing touches like fence installation.
Because fiberglass pools are pre-engineered, you can enjoy your pool as soon as three weeks after delivery. You can still have a ready-to-use pool in a matter of weeks vs. the arduous months-long process required for concrete pools.