How to Build an Octagonal Deck

Step 1: Getting Started/Examining the Plans

From the plans found on our website, locate the Framing Plan. This is the most useful page for building the Octagonal Deck. In these instructions, we will be using a 12' Octagonal Deck as an example. Slight modifications will need to be made for larger or smaller octagonal decks.

Start by building the core rectangular section of the deck. To build the core, use two 2"x6" support boards, two 2"x6" end boards, a 4"x4" post, and the four corner Dek-Block® piers.

Before Building

Download a free detailed plan with full material list and measurements from our Deck Plans Section.

Block Layout Plan

Framing Plan

Framing Plan

Printable Step by Step Instructions

The printable version of our instructions are in Adobe PDF format.

You must have Adobe Acrobat to be able to view and print the plans. The Acrobat Reader is free from Adobe.

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