20x20 Hennin Post & Beam Open Plan Kit

The original Hennin Post & Beam. In 1973, Pat and Patsy designed and built this house with timbers hewn on site using traditional all-wood joinery. Since then we have seen this frame used for dry storage, a starter cottage on vacant land, workshop, bedroom addition, family room addition, two-horse barn, first home, two car garage with game room, or guest house (for the guest who you can tolerate for up to a week at a time). Expand this frame in 10-ft increments.


Using a special “tusk” tenon, this frame features a 20’ clear span with no interior posts for maximum design flexibility. The kneewall on the second floor is two feet; the 12/12 roof pitch.

Each “bent” adds a 10’x20’ space. Dormers and shed additions are easy to add. The kneewall height is also adjustable based on your needs. The possibilites are endless. Estimate for adding an additional 10 foot bent is decribed below.

Our kits exceed the R-value requirements of the 2012 International Energy Conservation Code (IECC). The details of the structure as well as the insulation can be modified to meet your project, site and budget needs. Remember, most of the timber frames that we build are custom designed!

20x20 Pricing
20'x20'pre-cut kit
kit raising
SIP** Enclosure
Install SIPs
20'x20' Subtotal
Make this building longer by 10-ft increments
additional bent   $11,200
bent raising   $2,400
SIP** Enclosure   $17,500
Install SIPs   $4,200
Add'l Bent Subtotal   $35,300
20'x30' Subtotal   $111,600


*All Pricing subject to change without notice. Prices are FOB Woolwich, ME; shipping is not included. Included, but not shown, are second floor boards: planed nominal 2-in V-match T&G with rough opening for stairs.

Timber Frame Specs: posts: up to 12-ft - knee wall: 2-ft - ceiling height: up to 10-ft - roof pitch: 12/12

**Panel Specs: 5-1/2-in R-25 wall, 11-1/4-in R-45 roof EPS foam-core panels

The Wood: We can build these frames with nearly any wood species. Prices above are for Eastern Hemlock or Eastern White Pine. Green timbers are planed, chamfered, and oiled to protect the surface, reduce checking, and slow the drying process. All timbers are planed full dimension unless otherwise specified.

Kits include all pegs and wedges, as well as nominal 2-inch tongue and groove decking on the second floor.

Curved or straight braces are available per your specification.

  • Pete Neidhardt
    After taking their Design & Build course, I had the confidence to build this timber frame house, from a version of their stock plans. And you will too.
    Pete Neidhardt
  • Chasen Gillies
    We drove thirteen hours through a blizzard to take the timber framing course and it was worth it. You can tell this family has been teaching people since the 70's. 70's?! These guys are great. I hope to be back to learn but just saying "HI" would be a win. They've probably mapped out every minute of the week for the students but it still feels relaxed. Best of all, I can say with confidence, I can build a house. A timber structure. And I will
    Chasen Gillies
  • Matt Anglin
    Excellent course on house building. Teaches about every aspect of house including good design principles.
    Matt Anglin
  • Laurie Palagyi
    Shelter is a phenomenal resource of skill, intelligence, and good people. I took the two week design/build course and it was wonderful. I left with the confidence to assess my own home and any future home that I may build or purchase. Shelter is the real deal.
    Laurie Palagyi
  • David H T Kane
    Instructors make sure their lectures are clear and understandable to the students. Great follow through.
    David H T Kane
  • Deborah Caldwell
    Nothing can beat the hands-on experience that my daughter and I enjoyed for three weeks at the shelter institute. I have kept in touch ever since. I am disappointed that I cannot leave a comment on Pats chainsaw videos. The system does not seem to acknowledge our presence.
    Deborah Caldwell
  • Enzo Talladira
    As a second generation carpenter/joiner Shelter Institute's online course is a must for all who are interested in Timber Framing and the enjoyment of life.

    I have found the team to be responsive, caring and helpful. A pleasure to deal with.
    Enzo Talladira
  • Kristina Rae Bolduc
    So far our online courses are phenomenal!!! We love Pat, Gaius, and Blueberry! Gabe is pretty awesome too!!
    Kristina Rae Bolduc

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