Once they give the okay, the total time to build a deck can be as short as a few days, to 3 or 4 weeks for large, intricate decks. It all depends on the design, size, materials, and upgrades you've opted for. On average, it usually takes about 1.5 to 2 weeks to build a new deck. How Long Does It Take To Build a Deck? Here's The Truth - customdeckcreations.com https://customdeckcreations.com � how-long-does-it-take... customdeckcreations.com https://customdeckcreations.com � how-long-does-it-take... Once they give the okay, the total time to build a deck can be as short as a few days, to 3 or 4 weeks for large, intricate decks. It all depends on the design, size, materials, and upgrades you've opted for. On average, it usually takes about 1.5 to 2 weeks to build a new deck.