20x12 Walkout Deck Plans
A 20 foot by 12 foot ledger-attached deck sitting 8 feet above grade, the height you get off the back of a walkout basement, with a wide landing stair running down to the yard. Height is what makes this set worth reading: taller posts, longer stair runs, and the guard and footing details that plan examiners look at first.
It is drawn on a generic lot, so the site plan here does not show a real property. When you run your own address, we pull your parcel, lot shape, and setbacks from public records and redraw the whole set around your actual house.
Deck specifications
| Deck size | 20'-0" x 12'-0" (240 sq ft) |
| Height above grade | 8'-0" |
| Attachment | Ledger to house band joist |
| Beam | Dropped |
| Joist spacing | 16" on center |
| Decking | 1x6 composite |
| Guard rail | 36" Fortress rail system |
| Stairs | Wide landing stair, front edge, 4'-0" landing, 3 stringers |
| Design loads | Moderate snow, cold frost zone |
What is in the 7-sheet set
Every sheet carries a title block, and every structural member cites the 2021 IRC section it was sized from. These are not stock previews. They were drawn by the same pipeline that will draw yours.
Using this for a permit
Most building departments want a site plan showing the lot, house, deck, and setbacks, plus a framing plan, elevations, structural details, general notes, and the ledger attachment detail. This set has all of them. Download the sample to see exactly what a reviewer would be looking at, then generate the same set against your own lot.