How to Build a Three Car Garage How to Build a Three Car Garage

What You'll Need
Building material and tools
Lumber/Plywood
Carpentry tools
Windows and doors
Shelves, cabinets, racks, etc.
Electrical wiring, lights, etc.
Plumbing equipment, if needed
Safety equipment (gloves, goggles, etc.)
Painting tools

A three car garage is useful for not only parking cars but also storing tools, gardening equipment, sporting equipment, and more. However, before you begin building your own three car garage, make sure that you check with the local building department; you may have to submit your building plans to them and obtain an approval before you can get started.

Step 1 – Building Design

The first step is to draw-up a building design. First, decide the location. Second, determine the size. Your garage should be at least 30 feet wide; 32 or 34 feet is even better. The minimum depth of your garage should be 24 feet. Third, you will need to design your garage such that you can accommodate either three individual overhead doors. You can also use a combination of both double and single overhead doors, if you like.

Step 2 – Foundation/Flooring

It is best to consult a professional or an architect to determine the type of foundation that you should use. Alternatively, you can build a foundation by marking the space where your garage will be, and then digging up the area. The deeper you dig, the better it is. Next, fill the trench with the dug up spoil and gravel. Pack it in tightly as you go along. Next, start laying your floor. Use rigid foam boards to insulate it. Then, pour concrete onto the surface and make concrete slabs, using these boards. Use stakes, placed at 3 feet intervals, to secure the board, and re-strengthen the concrete using rebars. You will need to position the anchor bolts, which will hold the bottom plates of the walls, before the concrete dries. Place these at six-inch intervals.

Step 3 – Exterior Structure

Once the concrete has cured, start laying your the bottom plates (which should be made of treated lumber). Use sill foam between the concrete and bottom plates. Build your wall sections using 2 X 4 inch planks, leaving openings for doors and windows. Use studs to secure the plates and wall sections. For the top plates, add extra 2 X 4 inch boards to strengthen them. For window headers, use 2 X 6 inch planks. Door headers can be built using 2 X 12 inch boards. You can also use prefabricated beams for this purpose. You should put at least two trimmer studs on either ends to support the header. Finally, complete your walls with plywood. Install the doors and windows using the manufacture’s instructions. You should call a professional electrician and plumber during this stage to help you install all electrical wiring, lights, etc. and water outlets, if needed. Your roof should be built with prefabricated roof trusses. Secure the trusses in place and sheathe using plywood. Next install roofing felt, and then cover your roof with shingles.

Step 4 – Interiors

Use your garage walls effectively by placing racks, pegboards, and shelves. You can also use garage cabinets for additional storage. Install the desired means of storage based on the manufacturer’s instructions. Once all your installation is complete, paint your garage for a finished look.

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