20×20 King Post with Shed Roof Plan

20x20 King Post Plan

Forget a man-cave, this 20’x20′ post plan offers the ultimate retreat opportunity right in your own backyard. The king post area is 15′ wide by 20′ deep so you can spread out and work on your next project. The shed roof rounds out the building, creating a 5′ by 20′ space in which to organize and store your tools on a bench you build or roll in. Though the space may be for working, you will enjoy the high ceiling, featuring exposed timbers and creating a beautiful sense of space – pull out some chairs at the end of the day, put your feet up, and enjoy your vastly improved man-cave over a beer with friends. 

Alternatively, enclose the king post area to create a small guest cabin – but be sure to leave the shed roof area open to accommodate your rockers for a peaceful outdoor space to enjoy a cup of coffee in the morning or the sunset at night. 

This simple 20×20 timber frame plan is 15 wide with a 5-foot shed roof for a total of 20 feet wide and is 20 feet long with a 10:12 roof pitch and a 3:12 roof pitch on the shed roof.  The instantly downloadable PDF plans have 26  pages full of renderings, elevations, sections, individual piece drawings and a complete timber list. They are sized to 8.5 x 11, so you can print them from home.

The roof pitch on the king post area is a 10/12, while the shed roof has a 3/12 pitch. Download the plans today to get a full plan set including renderings, elevations, sections, individual piece drawings, and a complete timber list.

The package includes (26) PDF pages in 8.5 x 11 format, full of renderings, elevations, sections, individual piece drawings, and a complete timber list, all for immediate download.


Important Information:

Timber Frame HQ provides plans for construction purposes but does not oversee the construction. The plan purchaser is responsible for assuring the plan meets local codes and regulations. It is the responsibility of the plan purchaser to obtain any and all structural analysis, engineering and specifications that may be required in the municipality in which it is to be built. Plan purchaser is to verify all lot conditions and measurements before construction. Purchaser is responsible for additional expenses incurred in order to meet local code and engineering requirements.

Customer understands that the following conditions in your specific area may require additional engineering:

  1. Wind / hurricane / tornado
  2. Seismic / earthquake
  3. Heavy snow
  4. Flood potential
  5. Soil instability
  6. Timber Frame Engineering

Customer understands that HVAC, Plumbing & Electrical will not be included in all plans.

When you purchase a set of plans, you are purchasing a limited copyright license for a design giving you the right to build that structure one time at your location. Your copyright license was granted when you paid the purchase fee. You do not have the right to build the design a second time unless you have a signed agreement with Timber Frame HQ. Please note that copyright law protects “derivative works” the same as it protects the original design. That means that making some changes doesn’t make it a new design. We do not allow modifications of our designs by others, without permission. Your copyright license does not allow another professional to represent our design work as their own.

Timber Frame HQ retains all common law, statutory and other reserved rights, including the copyright. This applies even when you have participated in the development of the design to a significant degree.

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25 thoughts on “20×20 King Post with Shed Roof Plan”

  1. I like the overall look and design of this frame but I need a little more length. Would it be possible to make the frame 24 feet deep so the main area is 15×24 with out an additional bent or sizing up the timbers too much?

  2. Thanks for your questions. That would be fairly simple change you can make in the field. You will just need to increase the length of the purlins, ridge and other timbers running that direction by 24″ in both bays.

  3. I’d like this for a sugar shack. I would like to raise the roof by 4′?, leaving the sills at 7 or 8′ and install a floor in front, remove the ridge at the back for the cupola. Is this a simple revision or does it require some head scratching and redrafting?

  4. I think those changes are easy enough not to require any redrafting of it. If you have any questions along the way drop up a line and we will do our best to help out.

  5. Hi there, I love the design but am thinking I may only have space for a 15’ x 20’ structure. How difficult would it be to reduce the width by 5 feet, resulting in a 10ft wide cabin and 5 ft shed? I imagine the roof pitch would have to change; would it be 12/12 then?

  6. Hi Brice,
    Is this a design that can be built and stood up by a group of strong guys without a crane?
    How would I attach it to a concrete slab to use as a pavilion?

  7. I am looking to build a wood working shed. This plan is all most prefect for what I am looking for, but can 2 of the knee braces be removed at the end to allow for a 2 door, full size barn door opening? I can adjust for the other sizes since I am cutting my own wood.

  8. Richard Offermann

    What are the post and principle rafter sizes for this building? I’m in need of a 20×30 building for my work shop that doesn’t use an outrageous amount of timber. I have long leaf yellow pine on my property and plan on using it for the frame. Adding a bent to this design looks rather easy and I like the purlins as they save a lot of board feet of timber. I’m trying to avoid having to cut down an additional 14 large trees just for the rafters that most of the other designs of the size I need require.

  9. I decided to purchase a membership and I’m glad I did. This design will work out very well for my shop. All of the other plans of the right size required common rafters and massive timbers. I would have had to find and harvest dozens of trees in order to have enough material. With this plan I have the space I want and I don’t need deforest my land to do it.

  10. Katrina Williams

    Gordon, the plan is designed with a 10-12 pitch over the main part. You could alter it to 5-12 and still use a king post design, but many of the timber sizes would change.

  11. Would it be possible to replicate the porch on the opposite side and increase the size to 3m each

  12. Hi, is there an updated timber list for this plan? The link above in the comments no longer works. Also, are there any photos of this plan actually built?


  13. Katrina Williams

    We no longer provide timber lists prior to purchase. Keep in mind we offer a 30-day satisfaction guarantee. We can tell you that this plan utilizes 2772 board feet of 8x and 6x timbers.

  14. Kimberly Ann Ross

    Hello – do you have finished photo of this plan ?

    I would like to have a visual of what it may look like after completed.
    Thank you

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