Back to Design Library
Barns/Garages

30' x 42' w/ Dormer & Porch

Customize It to Fit Your Project

CNC Cut Frame Starting at $53,995

Designed as a starting point.

Change the dimensions, floor plan, porches, garage, timber species, roof and exterior finishes.

30' x 42'

Footprint

2036

Square Feet

2

Stories

Starting dimensions

Pick a starting size

Sized around this design's 30' x 42' footprint — every option can be adjusted.

Choose a width

Choose a length

This 30' x 42' heavy timber frame structure provides over 2,000 square feet of clear, open interior space designed for strength, flexibility, and long term durability. Built using traditional mortise and tenon joinery, it delivers a proven timber framing system with both structural integrity and timeless appeal. The frame is engineered with substantial timber members including 8x8 posts, 8x12 plate beams, 8x14 girders, 6x10 and 6x12 joists, 4x6 knee braces, 8x12 ridge plates, and 4x10 rafters. This heavy timber system creates a strong structural skeleton capable of supporting a variety of building applications. With its open layout and balanced proportions, this frame is designed to be adaptable for multiple end uses while maintaining the strength and aesthetic of traditional timber construction.


Frame Specifications:

Timbers are 1/2" Under Full Dimension

Joinery: Mortise and Tenon

Posts: 8x8

Plate Beams: 8x12 

Girders: 8x14

Joists: 6x10 and 6x12

Ridge Plates: 8x12

Knee Braces: 4x6

Rafters: 4x10

Roof: Main:8 Pitch; Dormer: 4 Pitch

Wall Height: First Floor: 8'-6"; Knee Wall: 2'-10 1/2"

Available project paths

Choose the level of support you need

Purchase the custom CNC-cut frame by itself or coordinate it with visible wood components and a high-performance SIP enclosure.

Design

Custom Frame Design

For owners and professionals who need the timber structure developed and documented.

  • 3D timber-frame model
  • Frame plans and elevations
  • Connection coordination
  • Engineering coordination
Core package

CNC Frame Package

A precisely modeled, CNC-cut and labeled timber frame ready for assembly.

  • Posts, beams, braces and rafters
  • Mortise-and-tenon joinery
  • Wooden pegs and specified fasteners
  • Shop drawings and piece labeling
Complete shell

Frame + Enclosure

Combine the frame with compatible wood products and structural insulated panels.

  • Roof and loft decking
  • Tongue-and-groove siding options
  • SIP wall and roof packages
  • Delivery and project coordination
Make it your own

This design is only the beginning.

Continue exploring

Related designs

48' x 72' Monitor Style

48' x 72' Monitor Style

View Design →
28' x 36' Broken Back Saltbox

28' x 36' Broken Back Saltbox

View Design →
24' x 24' Shed Roof

24' x 24' Shed Roof

View Design →