Backyard Buildings

Unclutter your life with affordable backyard storage from Mueller. For easy assembly and functional storage space, our Backyard Building Kits can’t be beat. These sturdy steel buildings are available in six sizes and many color options to complement your home. There’s no welding required – you simply bolt it together. For the finishing touch, get the optional floor kit.

Available Backyard Building Kit Sizes

6' x 9' x 7' - $995

Walk Door Size: 3' x 6'4"
Optional Floor Kit - $150
Optional Mid Girt - $65

  9' x 12' x 7' - $1,395

Walk Door Size: 3' x 6'4"
Optional Floor Kit - $235
Optional Mid Girt - $90

12' x 15' x 7' - $1,595

Walk Door Size: 5'4" x 6'4"
Optional Floor Kit - $415
Optional Mid Girt - $95

12' x 21' x 8' - $2,195

Choose from:
- Walk Door Size: 5'4" x 6'4" or
- Roll-up Door Size: 5'9" x 6'5"
Optional Floor Kit - $550
Optional Mid Girt - $150

18' x 21' x 8' - $2,695

Choose from:
- Walk Door Size: 5'4" x 6'4" or
- Roll-up Door Size: 5'9" x 6'5"
Optional Floor Kit - $770
Optional Mid Girt - $175

24' x 24' x 8' - $3,795

Roll-up Door Size: 7'9 1/2" x 6'5"
Optional Floor Kit - $1,200
Optional Mid Girt - $235

Optional Floor Kits include 4" C purlin with 3/4" plywood

Download Manual:


Mueller does not represent these Backyard Buildings to meet any specific code or engineering criteria. These buildings are intended to be erected in geographical locations which do not require engineered loads for buildings under 400 sq. ft.

Please check local building codes before ordering.


Standard Features:

  • Over 30 colors to choose from.
  • All steel frame (optional galvanized frame available)
  • 26 gauge wall and roof sheets featuring 30-year limited warranty paint
  • Trim package

Each Kit Includes:

  • Erection drawings
  • All required screws and sealers
  • Door
  • Pre-cut parts
  • Detailed instructions

Color Options:

Click here for information about our paint warranties.