Decks, Porches and Pergolas Designing and Manufacturing Decks and Porches ADD 20% TO ALL DECK PRICES PRE-BUILT DECKS YOU PICK UP All decks are made of pressure-treated southern yellow pineFor composite deck boards and step treads add 35% to deck price.Custom designs are availablePrices below include 4 steps and safety hand rails, $55 per extra step SizePriceSealer and Stain 4 X 4$550$454 X 6$660$504 X 8$795$606 X 8$1055$756 X 10$1425$856 X 12$1595$1008 X 12$1925$12510x12$2300$12510 X 16$2455$200 Delivery charge for prebuilt decks are 10% of list price ($100 minimum) $4 mile extra beyond 10 miles. Please call for Pergola pricing. Mobile Home Deck/Porch