How to Build a Carport: A Complete Guide

PDF download Download Article
Make a simple carport for your recreational vehicles
PDF download Download Article

Carports are standalone structures that create extra outdoor storage to protect your car, boat, and other valuables. They're protective structures that can help increase your vehicle's life and even increase your home's value. Fortunately, carports are an intermediate DIY that you can tackle on a weekend, solo, or with the help of a friend. Refer to this guide to learn how to build a carport from the ground up!

Simple Way to Make Your Own Carport

Build a 12 feet (3.7 m) wide carport by digging post-holes at each corner of the structure. Pour cement into a hole one at a time, and place the posts in the cement to dry. Cut out notches on each post to slide the beams in place. Then, nail the rafters, plywood, and shingles in place.

1

Measure and mark the perimeter.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/3\/37\/Build-a-Carport-Step-1-Version-4.jpg\/v4-460px-Build-a-Carport-Step-1-Version-4.jpg","bigUrl":"\/images\/thumb\/3\/37\/Build-a-Carport-Step-1-Version-4.jpg\/v4-728px-Build-a-Carport-Step-1-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    For a single carport, measure a space that's 16 feet (4.9 m) long and 12 feet (3.7 m) wide for a standard vehicle. It requires six posts, one on each corner of the length. [1]
    • Double carports are ideal for two or one standard vehicle and other items. They range from 18 feet (5.5 m) to 24 feet (7.3 m) wide.
    • Triple carports can store up to three standard vehicles or a large boat house or tractor. They range from 26 feet (7.9 m) to 30 feet (9.1 m) wide.
    • Consider using a pre-fabricated metal or lumber carport kit with the necessary materials and installation instructions.
    2. Advertisement
2

Prepare the ground.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/99\/Build-a-Carport-Step-2-Version-4.jpg\/v4-460px-Build-a-Carport-Step-2-Version-4.jpg","bigUrl":"\/images\/thumb\/9\/99\/Build-a-Carport-Step-2-Version-4.jpg\/v4-728px-Build-a-Carport-Step-2-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    To level the ground, remove any grass in layers with a shovel , raking over the underlayers with a metal rake. Tamp the rank with foot pressure. Add a layer of crushed granite or dark weed matting over bare ground to avoid tracking dirt into the house. [2]
    • The best idea would be to pour concrete , or build on a pre-existing concrete slab. This will give your carport the most life and durability.
    • You can skip this step if you build a carport on a concrete pad or at the end of a paved driveway. Instead, measure the dimensions of your concrete pad and shape the structure to the ground.
3

Dig holes for posts.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/75\/Build-a-Carport-Step-3-Version-4.jpg\/v4-460px-Build-a-Carport-Step-3-Version-4.jpg","bigUrl":"\/images\/thumb\/7\/75\/Build-a-Carport-Step-3-Version-4.jpg\/v4-728px-Build-a-Carport-Step-3-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    Using post-hole diggers, make a hole at least 2 feet (0.6 m) deep. If you live in a high-wind climate or an area that receives lots of heavy snowfall, dig a hole at least 4 feet (1.2 m) for a more stable structure.
    2. Advertisement
4

Pour the concrete and set a post in each hole.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/11\/Build-a-Carport-Step-4-Version-5.jpg\/v4-460px-Build-a-Carport-Step-4-Version-5.jpg","bigUrl":"\/images\/thumb\/1\/11\/Build-a-Carport-Step-4-Version-5.jpg\/v4-728px-Build-a-Carport-Step-4-Version-5.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    For a simple structure, use heavy-duty posts at least 9 feet (2.7 m) high on one side of the carport and 11 feet (3.4 m) high on the other. Pour concrete into the hole, then plant the post to rest on the bottom. Fill the hole with soil and tamp in the layers. Pour more concrete until the hole is filled. [3]
    • Use a level to make adjustments as the concrete is hardening to ensure the post is vertical.
    • Allow the concrete to harden for at least one full day before nailing on the beams.
5

Install support beams.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/61\/Build-a-Carport-Step-5-Version-4.jpg\/v4-460px-Build-a-Carport-Step-5-Version-4.jpg","bigUrl":"\/images\/thumb\/6\/61\/Build-a-Carport-Step-5-Version-4.jpg\/v4-728px-Build-a-Carport-Step-5-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    To make the frame for your carport, use screws to secure the beams to the top of your six support posts. Place a level on top of each post to ensure they're even. [4]
    • If the posts are wobbly, use stones or wooden braces to support them while you work.
    2. Advertisement
6

Secure the walls with nails.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/ba\/Build-a-Carport-Step-6-Version-3.jpg\/v4-460px-Build-a-Carport-Step-6-Version-3.jpg","bigUrl":"\/images\/thumb\/b\/ba\/Build-a-Carport-Step-6-Version-3.jpg\/v4-728px-Build-a-Carport-Step-6-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    Fasten the front and back beams first to create a rectangular box 16 feet (4.9 m) long, 9 feet (2.7 m) wide, and 7 feet (2.1 m) high. Secure two supporting crossbeams flat on the top of the shortened corner posts and extend to the higher corner posts about 2 feet (0.6 m) down from their tops. Next, nail them to the higher posts using T-shape hangers. [5]
    • Then, fasten the side beams by nailing crossbeams across your posts. The beam on the lower side should be nailed on top of the front and back beams.
    • If necessary, try to connect them by nailing on top of the middle post on the lower side, making the beam level across all three posts.
7

Fasten the rafters.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/04\/Build-a-Carport-Step-7-Version-4.jpg\/v4-460px-Build-a-Carport-Step-7-Version-4.jpg","bigUrl":"\/images\/thumb\/0\/04\/Build-a-Carport-Step-7-Version-4.jpg\/v4-728px-Build-a-Carport-Step-7-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    To secure them, use the notch method. Put the front rafter in position, marking where it comes into contact with the side beams with a pencil mark. Then, take a circular saw so the rafter sinks about â…“ of the way into the beam. Use this rafter as a template to notch the five others. [6]
    • Opt for the hanging method if you need the beam to be flush. Use 25-degree metal joist hangers and rest them on top of the beams. The nails will go through the hanger into the rafter and the beam.
    2. Advertisement
8

Attach the roof.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/e\/e9\/Build-a-Carport-Step-8-Version-4.jpg\/v4-460px-Build-a-Carport-Step-8-Version-4.jpg","bigUrl":"\/images\/thumb\/e\/e9\/Build-a-Carport-Step-8-Version-4.jpg\/v4-728px-Build-a-Carport-Step-8-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    Purchase 1.5 inches (3.8 cm) plywood sheets as large as possible. The fewer the seams, the less potential for water leakage. The plywood should produce a 6 inches (15.2 cm) overhand on the front and back of the carport. [7]
    • For example, if your plywood sheets are 8x4, you’d need to buy 6 sheets. Then, cut two pieces down to size.
9

Caulk the seams in the plywood.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/96\/Build-a-Carport-Step-9-Version-4.jpg\/v4-460px-Build-a-Carport-Step-9-Version-4.jpg","bigUrl":"\/images\/thumb\/9\/96\/Build-a-Carport-Step-9-Version-4.jpg\/v4-728px-Build-a-Carport-Step-9-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    Use a caulking gun to fill the roof's seams. To keep the elements out, cover the roof with tar paper or synthetic paper and create as waterproof a surface as possible before shingling over it. There's no sense in creating a carport to keep your car out of the rain if it leaks. [8]
    • Would it be smarter to insulate the structure? Maybe, but not cost-effective. Remember, you're not building an addition to your house; you're building a simple structure to keep junk off your car.
    2. Advertisement
10

Nail shingles to the roof.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/45\/Build-a-Carport-Step-10-Version-4.jpg\/v4-460px-Build-a-Carport-Step-10-Version-4.jpg","bigUrl":"\/images\/thumb\/4\/45\/Build-a-Carport-Step-10-Version-4.jpg\/v4-728px-Build-a-Carport-Step-10-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    Install three-tab shingles over the plywood. Nail a layer of weather sheeting over the plywood for an extra lay of protection. Then, go in with enough three-tab shingles to cover the entire roof. These can be nailed in with a hammer or a nail gun to create a waterproof barrier between your carport and the elements. [9]
    • Alternatively, use a slanted aluminum roof instead if you don't want to shingle the roof.
11

Reinforce the joints.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/0e\/Build-a-Carport-Step-11-Version-4.jpg\/v4-460px-Build-a-Carport-Step-11-Version-4.jpg","bigUrl":"\/images\/thumb\/0\/0e\/Build-a-Carport-Step-11-Version-4.jpg\/v4-728px-Build-a-Carport-Step-11-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    Select metal plates that can be nailed onto the various joints in the structural composition of the carport, especially where the posts meet the beams, where the beams meet the rafters, and so on. This will keep the structure from collapsing on your valuables. [10]
    2. Advertisement
12

Protect the wooden beams.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/10\/Build-a-Carport-Step-12-Version-4.jpg\/v4-460px-Build-a-Carport-Step-12-Version-4.jpg","bigUrl":"\/images\/thumb\/1\/10\/Build-a-Carport-Step-12-Version-4.jpg\/v4-728px-Build-a-Carport-Step-12-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    to protect the beams. Since you've gone to all the work, treating the exposed wood is a good idea. Use a paint brush and waterproof wood stain and coat the exposed wood following the manufacturer's instructions. This will increase the life of the wood and keep you from having to repeat the project in a few years. [11]
    • It's a good idea to re-stain regularly to keep the structure's life up. Revisit your work periodically to catch up with repairs before they become a major problem.
13

Test the structure.

PDF download Download Article
  1. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/16\/Build-a-Carport-Step-13-Version-4.jpg\/v4-460px-Build-a-Carport-Step-13-Version-4.jpg","bigUrl":"\/images\/thumb\/1\/16\/Build-a-Carport-Step-13-Version-4.jpg\/v4-728px-Build-a-Carport-Step-13-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><p>\u00a9 2024 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is <b>not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.<br>\n<\/p><p><br \/>\n<\/p><\/div>"}
    Before you park your car beneath your new structure, check its stability. Apply your body weight to the posts first. If the structure is wobbling, do not get on the roof. Instead, add stability braces on the outside of the structure to reinforce it. [12]
    2. Advertisement

Expert Q&A

Search
Add New Question
  • Question
    What size of posts would I use for a 16ftx10ft carport?
    Mark Spelman
    Construction Professional
    Mark Spelman is a General Contractor based in Austin, Texas. With over 30 years of construction experience, Mark specializes in constructing interiors, project management, and project estimation. He has been a construction professional since 1987.
    Mark Spelman
    Construction Professional
    Expert Answer
    You can use 10 foot or 12 foot posts for the carport. Either should work fine for you.
    Thanks! We're glad this was helpful.
    Thank you for your feedback.
    If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
    Yes No
    Not Helpful 27 Helpful 9
Ask a Question
200 characters left
Include your email address to get a message when this question is answered.
Submit
      Advertisement

      Video

      Tips

      • Check with your local city planning office to ensure your building project is up to code. Additions to a residential property can affect the value of your home.
        Thanks
        Helpful 0 Not Helpful 0
      • In some areas, you'll likely need to produce structurally sound building drawings bearing the signature of a licensed structural engineer.
        Thanks
        Helpful 0 Not Helpful 0
      • You'll need proof of property ownership, permit application worksheets, and construction drawings to obtain necessary permits.
        Thanks
        Helpful 0 Not Helpful 0
      Submit a Tip
      All tip submissions are carefully reviewed before being published
      Name
      Please provide your name and last initial
      Submit
      Thanks for submitting a tip for review!
      Advertisement

      Things You'll Need

      You Might Also Like

      How to
      Build a Stone Foundation
      How to
      Lay Shingles
      How to
      Program a Garage Door Opener to Your Car
      How to
      Extend Your Garage
      How to
      Program a Chamberlain Garage Door Opener
      How to
      Adjust Garage Door Cables
      How to
      Plan a Garage
      How to
      Live in a Garage
      Advertisement

      References

      1. ↑ https://bulldogsteelstructures.com/blog/select-right-carport-size-needs/
      2. ↑ https://www.steelandstud.com/how-to-level-ground-for-metal-carports/
      3. ↑ https://www.titanlite.com.au/latest-news/step-by-step-guide-to-building-a-carport
      4. ↑ https://www.titanlite.com.au/latest-news/step-by-step-guide-to-building-a-carport
      5. ↑ https://youtu.be/DitVwosR1jg?t=295
      6. ↑ https://www.titanlite.com.au/latest-news/step-by-step-guide-to-building-a-carport
      7. ↑ http://www.buildeazy.com/carport.html
      8. ↑ https://www.westernstatesmetalroofing.com/blog/metal-roof-sealant
      9. ↑ https://todayshomeowner.com/roofing/guides/what-are-roof-shingles/
      1. ↑ https://www.metalcarports.com/blog/how-to-protect-your-carport-from-wind/
      2. ↑ https://www.backyarddiscovery.com/blogs/swingsets-and-playsets/when-to-seal-re-stain-your-outdoor-wooden-structures
      3. ↑ https://www.metalcarports.com/blog/how-to-protect-your-carport-from-wind/

      About This Article

      Article Summary X

      If you want to build a carport, you’ll need to secure permits from your city planning office and, depending on the building codes, you might also need to hire a structural engineer. Once your plans are approved, you can purchase a pre-fabricated carport made of metal and canvas or use pressure treated lumber to build one. Your carport should be at least 9” wide and 16” deep. For a carport made of lumber, lay 6 posts in the ground, fasten your beams, and then add the roof. For tips from our Contractor reviewer on what you’ll need to get permits, read on!

      Did this summary help you?
      In other languages
      Thanks to all authors for creating a page that has been read 528,331 times.

      Reader Success Stories

      • Richard Emery

        Jun 16, 2017

        "We were looking for a carport that will hold solar panels. I do not know for sure, but it looks like it will work. ..." more
        Rated this article:
      More reader stories Hide reader stories
      Share your story
      If you buy through links on our site, we may earn a commission .

      Did this article help you?

      Advertisement