How long does it take to build a supermarket? Posted on July 7, 2020May 12, 2021 by awsDONOTREMOVE How long does it take to build a supermarket? The projects run anywhere from four to five months. Ground-up projects we have built can take five or six months. If you are looking for a modern supermarket design and convenience store design, contact supermarketservices.com today!