40×42 Monitor Barn House Plan


SKU: 43615 Categories: , , , Tags: ,

If you are wanting a sizable structure with great presence and utility, look no further than this 40x42 monitor barn house plan! True to this style of barn, our plan has a large center aisle with shed wings on both sides, and a second level above the center aisle.  We have designed this to fit on a 40x42 foundation after the addition of 5 1/2" Studs, and 5/8" furring strips behind the posts for drywall to be installed.  You can enclose the entire structure, or leave one of the wings open for a comfortable porch.

With this package, we include architectural plans fleshed out as a four bedroom home with vaulted ceilings, large kitchen and living areas, and even a mud room!

  • Outside to outside of the posts measures 38’-11 ¾” x 40’-11 ¾”
  • With cladding, square footage is approx. 1680 first floor and 650 second level
  • Roof pitches 8:12 center aisle, 4:12 shed wings
  • Height to top of center rafters: 24’-10”; height to top of shed rafters: 13’-3”
  • Height to top of center plates: 19’-7”; height to top of shed plates: 9’-6”
  • Plan utilizes 9009.3 board feet
  • Mortise & tenon, spline and scarf joinery

As soon as you purchase this plan you will receive links to download the PDFs. The construction set contains 13 pages of detailed information. There are 3D drawings so you can visualize the finished frame, including a production drawing with every timber labeled. There are post, loft and roof plans, elevations and section drawings. And there are plenty of notated detail drawings explaining the complexities.  The piece drawing set contains 47 pages, showing you all the information you need to make the cuts on every timer. And we include connector, parts and timber lists to make procuring your materials easier.

This plan is also included in the Master Plan Bundle and the Timber Frame Home Plan Bundle 1.

40x42 Monitor Barn House Plan (43615) Interactive 3D Model
40x42 Monitor Barn House Plan (43615) - Plan Overview
40x42 Monitor Barn House Plan - Architectural Overview
40x42 Monitor Barn House Plan (43615) - Piece Overview

Frequently Asked Questions

Do you offer the whole kit?

Yes we do! Just fill out the form HERE and will will be in touch soon with more information and pricing.

Can  you modify this plan for me?

Yes, we can modify our plans to the size you need on a custom basis. For more information on the services that we offer and how the process works check out the page HERE

 If that is something that would interest you, fill out the  brief questionnaire HERE or click Get Started Today on the main Design Page from above.  

As soon as we get your information and give it a quick review we’ll contact you to schedule a phone meeting.  Please allow a few days for our team to respond.

Before our discussion, we urge you to buy the set of plans that most resembles the alteration that you seek. This will allow you to study the plans thoroughly, think through any other changes or design aspects that you want.

Are your plans engineered?

The plans we offer on our website are not stamped by an engineer. People build our frames all over the country, and in each location, there are different requirements.  Timber species, design loads and values needed are just some of the factors engineers need to take into account in each case.  

We do offer engineering services as an add-on to our standard plans. If this is something you are interested in, head HERE and fill out the brief questionnaire.  Armed with that information, we can get our heads into your project before we speak.  That way we are best prepared to answer all of your questions.

As soon as we get your information and give it a quick review we’ll contact you to schedule a meeting.

Have a question for us?

100% Money Back Guarantee for 30-Days

Purchase With Confidence...It's Risk Free!

If, for any reason, you don't like this plan, you can get a full refund anytime within 30 days after your purchase. If you have any issues, just get in touch with our support team and they'll either help you out until you get the results you need or give you a swift refund.

Important Information and Plan Licensing Agreement:

  • 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 measurements before construction.
  • Timber Frame HQ grants you a non-exclusive, non-sub-licensable and non-transferable license to use the plans purchased from the Timber Frame HQ website.
  • This License is personal to you only. You may not use the License for any other purpose except for personal purposes.
  • 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.  Only you may use the License, and such use shall be limited as stated above.
  • All materials provided under this License are owned by Timber Frame HQ. Any License granted under this Agreement shall only convey a non-exclusive, non-sub-licensable, and non-transferable right to use the plans in accordance with the full terms of this Agreement.
  • You are expressly prohibited from creating any derivative works in the plans or permit any other person to create any such derivative works. You are further expressly prohibited from reproducing* the plans in any fashion on any medium, except printing the plans directly from the PDF's you will receive. You may not modify the plans. Your License does not allow others to represent our design work as their own.
    *Please note:  You or someone else can print the plans for planning and construction use.
  • Your License does not allow others to represent our design work as their own.
  • Timber Frame HQ specifically disclaims and warranty that the plans will be error free and will not be responsible for any loss suffered by you because of the plans or otherwise.
  • Any commercial use of the plans is strictly prohibited.



  • 38’-11 ¾” wide by 40’-11 ¾” long outside of post to outside of post
  • Height to Top of Plates: 9’-6”, 13’-3 15/16” and 19’-7 1/16”
  • Height to Peak of Roof 24’-10 15/16” with 8:12 and 4:12 Roof Pitches


  • Four bedrooms, 2 1/2 baths
  • Living, dining, large kitchen, laundry and mudroom
  • 1680 square feet first floor, 680 square feet second floor for total of 2360 s/f


  • Posts – 8×8
  • Girts – 8×10, 8×12
  • Plates- 6×8, 6×10, 8×10
  • Rafters – 8×10, 8×14
  • Braces – 4×8


  • 66 pages total
  • Construction Drawings – 13 pages (11×17)
  • Architectural Drawings – 5 pages (11×17)
  • Detailed Piece Drawings – 46 (11×17)
  • Materials Lists – 2 pages (8 ½ x 11)

30-Day Guarantee

We are so confident you’ll love the plan that we stand behind it 100% with our 30-Day Money-Back Guarantee. You have 30 days to initiate a return with us for any reason.

It’s the best Return and Warranty Policy of any company. You can buy from us with full confidence that we’ll be here to help if something goes wrong or the plan doesn’t work out for you.

Return Policy

Our money-back guarantee gives you 30 days to decide whether this plan is everything you hoped for. You can return it for a full refund if it’s not working out. Here’s how that works:

Email us within 30 days of placing your order. We will refund you the full purchase price of this plan.

And remember, if you have any issues with your plan, even if you’re not sure you want to return it, please contact us personally. We want you and every other Timber Frame HQ customer to have the best possible experience with us.

Please note the 30-day Guarantee is for individual plan purchases and not for our Timber Frame Plan Bundle or other plan bundles for which we do not offer refunds due to the nature of the product.

Timber Kit


Customer Reviews

Based on 1 review

I need to know how i can print files larger
I cant see numbers on drawings
Thank you Laszlò

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