20×36 3-Car Garage Photo Gallery

Buy Blueprints For All 4 Size Garages Only $12.97

All 4 Sizes Included


How to build a 1 2 3 4 car garage in 10 easy steps

1 Car Garage

14x24-1-car-garage-3008×7 ft overhead door on gable end

2 Car Garage

24x24-2-car-garage-gable-end-door-30016×7 ft overhead door on gable end24x24-2-car-garage-side-door-300Or 16×7 ft door on side wall

3 Car Garage

32x24-3-car-garage-gable-end-doors-30032×24 with 16×7 and 8×7 ft overhead doors on 32 ft gable end24x32-3-car-garage-side-doors-300Or 24×32 with overhead doors on 32 ft side wall

4 Car Garage

24x40-4-car-garage-300Two 16×7 ft overhead doors
on side wall

Blueprints For
All 4 Size Garages Included


Custom 3 car garage

This is what the finished garage looks like.

Please note:

  • More photo galleries here
  • Click any thumbnail for a larger image
  • I built this garage using my standard garage plans. I just changed the length, width, height, doors and windows locations to suit this job.


This was a rather complicated slab because of the many different elevations. We framed and poured the slab, entrance apron, step and sidewalk all in one.

We had to hire a concrete pumper because there wasn’t enough access for the big concrete trucks to get into the back yard.






























  • Sizes: 1 car (14×24), 2 car (24×24), 3 car (24×32/32×24), 4 car (24×40)
  • Wall height: 8ft standard, 9-12ft optional
  • Stud spacing: 16 inch on center
  • Stud size: 2×4 standard, 2×6 optional
  • Roof pitch: 3:12 minimum
  • Roof covering: Shingles standard, optional: metal, rolled, built up
  • Trusses: Manufactured, available at most any lumber yard or truss company
  • Maximum overhead door opening height: 7 ft (with 8 ft wall height), up to 11 ft (12 ft wall height)
  • Floor: Monopour concrete slab standard, optional: wood, stem wall with concrete slab

Blueprints available for these 4 size garages

Typical layout look like this. Click for a larger image.

Typical layout look like this. Click for a larger image.

This represents the maximum number of cars you can park inside.

You don’t have to put all these doors in. You can use fewer doors if you like and have more space left over for other storage. Or add benches and have some nice shop and work space.

  • 1 Car, 14×24
  • 2 Car, 24×24
  • 3 Car, 24×32/32×24
  • 4 Car, 24×40

14×24 1 car garage

This garage has an 8×7 ft overhead door centered on the 14 ft gable end wall. You can install a 36 inch pass door and any number of windows on the other 3 walls.

24×24 2 car garage

There is a 16×7 ft overhead door installed on the center of any one of the 4 walls. You can install a 36 inch pass door and any number of windows on the other 3 walls.

This garage is square so you can install the overhead door on the gable end wall or a sidewall, depending on the look you want.

24×32/32×24 3 car garage

The difference between a 24×32 and 32×24 garage is the orientation of the trusses and ridge line. Both garages have a 16×7 and a 8×7 overhead door on the 32 ft wall.

The 24×32 uses 24 ft trusses and the ridge line runs along 32 ft dimension. The 32×24 garage uses 32 ft trusses and the ridge line runs along the 24 ft dimension.

24×40 4 car garage

This garage uses 24ft trusses. The 40 ft side wall has 2) 16×7 ft overhead doors and you can install a 36 inch pass door and any number of windows on the other 3 walls.

Each garage size includes this information:

  1. Notes on material usage
  2. Cost estimate worksheet and detailed materials list
  3. Instructions to customize the “blank” plans
  4. Blueprints: Typical layout with doors and windows marked
  5. Blueprints: Blank with floor
  6. Blueprints: Blank without floor
  7. 1) Notes on materials usage

    These notes will help you understand the components of the materials list and cost estimate worksheets.

    2) Cost estimate worksheet

    Print the cost estimate worksheet of the desired garage size and take it down to your lumber supply store. Fill in the prices to calculate the materials cost for the garage shell. The detailed materials lists shows how the wood is used in each of the 4 walls and the roof structure.

    3) Instructions to customize blank plans

    Use Table A and Figure 1 and fill in the blanks to make any garage layout you prefer. Write directly on the printed blueprints with a black pen. Make a few extra blank copies in case you make a mistake.

    4) Blueprints: Typical Layout

    These plans can be used as is if you like the door and window configuration. Or you can use them as a sample guide to mark the blank plans to your satisfaction.

    5) Blueprints: Blank with floor

    These plans don’t include any doors, windows, roof pitch, wall heigh, or dimensions and allow you to draw in any combination, location, and quantity of overhead doors, pass doors, and windows, etc..

    Use the Typical layout as a guide to customize this blank blueprint to your specifications.

    6) Blueprints: Blank without floor

    Standard floor and foundation is a mono-pour concrete slab. But with these blank plans you can provide your own supplemental diagram and build with a wood floor or a stem wall and concrete slab.

    Additional notes

    • Electronic delivery
    • Building codes
    • Additional engineering
    • Blueprint size and format

    Electronic delivery

    A link to download these plans in PDF format will be delivered to the email address associated with your paypal account within seconds of your purchase.

    Please save these files in your phone or computer so you can read or print them any time you want.

    Building codes

    These blueprints will meet building codes in most cases. But sometimes additional information is required that can usually be hand written on the blueprints with the guidance of your local building department staff.

    Most of the time just a few hand written changes or additions is all it takes to make the building department happy. They are usually pretty understanding with homeowners with little or no experience in the building permit process and will tell you exactly what they want in order to approve the plans.

    Additional Engineering

    If your building department requires engineering for the trusses or custom header that is typically built into the price of the trusses or header.

    Additional engineering might be required if you live in an area with extreme weather like lots of rain, snow, humidity, wind or seismic activity.

    Blueprint size and format

    The printed size of the blueprints are 36″x24″.

    Blueprints are in PDF format so you will have to print them out yourself. You can open them in a standard PDF reader and print them out in 8.5×11 size.

    But you will have to go to a print shop to have them printed out in full 36″x24″ size. Most print and blueprint shops can do this for about $1-$2 per copy. They can even re-scan them back into PDF format after you have marked them up to your specifications.

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