30x40 loft garage plans: design your own 30' x 40' gambrel roof garage with a loft

A 30 by 40 foot garage is 1,200 square feet (about 111.5 m²). The gambrel roof gives you a storage loft overhead.

Open Garage Planner at 30' x 40' with loft →

What you can do in Garage Planner

• Start at 30' wide by 40' deep, then change the size in 2-foot steps if you need to.
• Place overhead doors, a walk-in door and windows on any wall, and set the wall height.
• Switch between single-story, gambrel loft and modern single-slope roofs.
• Print a scaled plan set (floor plan, elevations, material list and permit checklist) for US$230, drawn in feet and inches.

Permits

At 1,200 sq ft, most US cities and counties will want a building permit for this garage. For example, North Carolina requires one for any accessory building over 12 ft in any dimension, and Ohio's residential code only exempts one-story accessory buildings up to 200 sq ft. State guides: Texas, Florida, Ohio, North Carolina. In Canada: Barrie, Ottawa, Waterloo. Rules are set locally, so check with your city or county.

All popular sizes

Garage Planner opens straight at any of these sizes (any width 12–36 ft by depth 20–40 ft, in 2 ft steps):

12x20 · 12x24 · 14x22 · 16x24 · 20x20 · 20x24 · 22x24 · 24x24 · 24x30 · 26x32 · 28x28 · 30x30 · 30x40 · 32x28 · 36x40

With a gambrel loft: 16x24 loft · 20x24 loft · 22x24 loft · 24x24 loft · 24x30 loft · 26x32 loft · 28x28 loft · 30x30 loft · 30x40 loft