Prefabricated DIY Deck Kits

Prefabricated means the engineering happens before the delivery, not on your lawn. Spans, joist spacing, beam sizing and the cut list are all resolved in advance, and the components arrive prepared for assembly.

In practice that removes the two things that make deck building hard: the structural maths and the cutting. 6 x 6 beams, 2 x 8 joists at 13 to 14 inches on centre to meet standard deck codes, 5.5-inch pre-sealed boards, galvanized hardware — assembled with a power drill in 8 to 16 hours.

Professionally engineered system
Assembles in 8 to 16 hours
Engineered for 15,000+ lbs
5-year structural warranty
Ships nationwide in 10 to 14 business days
Sourced and manufactured in the USA

What arrives in the box

  • Engineered lumber, cut to size

    Every board arrives cut to length. Wood kits use Grade 1 Southern Yellow Pine, kiln-dried and pressure-treated so it resists warping, cracking and moisture. Composite kits use a blend of wood fibres and recycled plastics.

    6 x 6 beams carry the load, 2 x 8 joists sit 13 to 14 inches on centre to meet standard deck codes, and 5.5-inch pre-sealed boards finish the surface.

  • Hardware and foundation included

    Galvanized, corrosion-resistant screws and brackets come in the box, along with Tuff Block foundation blocks. There is no separate parts list to source and no trip to the lumber yard.

    The deck is engineered for 15,000+ lbs and ships ready to assemble at 15 to 17 inches off the ground.

  • Instructions built for one person

    A standard power drill is the only tool you need. There is no cutting and no measuring on site.

    Every kit ships with step-by-step instructions and access to the 3D instructional app, which walks you through the build one component at a time.

Prefabricated versus a materials list

A materials list leaves you to design the frame, calculate the spans, buy the right lumber and make every cut. A prefabricated kit hands you the finished design and the parts to match it. The trade is flexibility for certainty: the footprint is chosen from set sizes, and everything inside it is already solved.

Three ways to build a deck

  • Hire a deck contractor

    A contractor handles design, materials, permits, foundation, construction and cleanup. It is the right answer for a complex build, and it is the most expensive: you are paying a premium for time and labour, and timelines run to weeks.

  • Build from raw materials

    Buying lumber, hardware and decking separately gives you the lowest upfront cost and the most work. You own the design, the measurements, every cut and the structural layout — typically across several weekends.

  • Use an engineered deck kit

    A-DIY sits between the two. The structural design is already done and the components arrive prepared for assembly, so a standard build takes 8 to 16 hours and costs 30 to 50% less than hiring a contractor.

Delivery, warranty and payment

  • Delivery

    Kits ship via LTL ground freight anywhere in the United States, typically arriving within 10 to 14 business days. The carrier contacts you to schedule curbside delivery.

  • Warranty

    Wood kits carry a 5-year structural warranty. Composite kits carry a 25-year warranty that covers the structure as well as staining and fading on the boards.

  • Paying over time

    Financing is available through Affirm, Klarna and Shop Pay, with $0 down and 0% interest options over terms of up to 24 months. Financing is subject to credit approval; terms and conditions apply.

Ready to plan your deck?

Book a free design consultation and an A-DIY specialist will size the deck to your space, or browse the kits and pick your size and finish.