DIY Gambrel Barn House Plans: 20x30 Loft Cabin with Porch PDF

DIY gambrel barn house plans for a 20x30 loft house with a covered porch. A 54-page PDF with framing drawings, a cut list and 21 illustrated steps for DIY builders.

- Product: DIY 20x30 gambrel barn house plan with loft and 6 ft covered porch
- Format: Digital PDF download
- Pages: 54
- Paper Size: US Letter
- Units: Imperial (feet and inches)
- Dimensions: 20' x 30' house (600 sq ft) plus a loft of about 160 sq ft, 6' x 20' covered porch, 20' x 36' platform, ridge about 23' 10" above grade
- Style: Gambrel barn house with a two-storey glazed front gable and board-and-batten siding
- Skill Level: Advanced (framing experience recommended)
- Includes: Floor plans, elevations, sections, framing drawings, truss and stringer templates, shopping list, master cut list, cut diagrams, 21 illustrated steps, 9 finished renderings
- Best For: DIY builders with framing experience who want a small barn style house or cabin with a loft
- Delivery: Instant PDF download after purchase, no physical item shipped

## What's Included in This Gambrel Barn House Plan

This 20x30 gambrel house plan covers the full shell of a small barn house with a loft, from pier footings to the metal roof, siding, stairs and guards. Every drawing comes from one 3D model, so the shopping list, cut list and step pages match.

- Ground floor plan, loft plan and two building sections
- 3D floor plans of the ground floor and loft
- Front, back, right and left elevations
- Window, door and header schedule with rough openings
- Shopping list and master cut list with a Part ID for every piece
- Cut diagrams and sheet layouts for plywood and OSB
- Full-size gambrel truss gusset and stair stringer templates
- Wall framing and gable wall framing drawings
- 21 illustrated step-by-step instructions
- 9 finished renderings, including 4 furnished interiors

## Floor Plan and Layout of the 20x30 Loft House

The ground floor has an open kitchen, dining and living area with a cathedral ceiling, one bedroom, a bathroom with a walk-in shower and a hall with laundry space. A stair with a landing leads to a 12 ft wide loft under the gambrel roof, with eave storage on both sides. The 6 ft covered porch runs the full 20 ft width of the front wall, under the main roof.

## Construction Details of This Barn Style House Plan

- Foundation: 21 concrete piers in 3 rows with three built-up pressure-treated girders
- Floor: 2x10 joists at 16 in on center with 3/4 in tongue-and-groove subfloor
- Walls: 2x6 exterior walls and 2x4 interior walls
- Roof: Site-built gambrel trusses at 24 in on center, 28/12 lower and 8/12 upper slope, ribbed metal roofing
- Exterior: Board-and-batten siding, cedar porch posts, beams, deck and porch ceiling
- Design basis: Roof snow load up to 30 psf and wind up to 115 mph (Exposure B); have the plan reviewed locally

## File Format, Paper Size and Units

The plan is a 54-page PDF sized for US Letter paper. All dimensions are in imperial units (feet and inches), and lumber is listed by nominal size. You can print the pages at home or at a print shop, or read them on a tablet or laptop on the job site.

## Who This DIY Cabin Plan Is For

This is an advanced DIY plan. It suits builders with framing experience who want a small house, cabin or barn house with a loft. The shell takes 2 people about 6 to 8 weekends; interior finishes are extra. A building permit is needed almost everywhere, so take the plan to your local building department before you start. Many builders plan over the winter and are ready to build in spring.

## How to Use Your Gambrel House Plans PDF

1. Buy the plan and complete checkout.
2. Download the PDF from the link on your order page or in your email.
3. Print the pages or open them on your screen.
4. Check local codes, then follow the shopping list, cut list and 21 steps to build.

## Digital Product Note

This is a digital product. No physical item is shipped. The PDF is available for instant download after purchase.

## License and Terms of Use

This plan is for personal use only. You may build this house for yourself, one build per purchase. You may not resell, share or publish the PDF or its drawings, or sell houses built from it as a business without written permission.

## Frequently Asked Questions

### How do I download the PDF after purchase?

After checkout, you can download the PDF from the download link on your order confirmation page and in your confirmation email. The download is instant, and nothing is shipped.

### How big is a 20x30 house?

A 20x30 house has 600 sq ft on the ground floor. This 20x30 gambrel house plan adds a loft of about 160 sq ft for 760 sq ft in total, plus a 6x20 ft covered porch.

### What are the downsides of a gambrel roof?

The main downsides of a gambrel roof are more framing parts and a steep lower slope that takes more care to roof. This plan includes full-size gusset templates and a cut list for every gambrel truss part.

### Is the loft in this barn house plan a legal bedroom?

Whether the loft can count as a bedroom depends on your local code for stairs, egress window and ceiling height. The back gable window in this barn house plan can be sized as an egress window if needed.

### Can I build this gambrel house on a slab?

Yes, you can build this gambrel house on a slab by skipping the pier, girder and floor steps and framing the walls on the slab with pressure-treated bottom plates. The floor then sits about 8 in above grade and the porch steps change.

## More Plans from KRMPLANS

Looking for a different size or roof style? Browse the other cabin, house and barn plans in the KRMPLANS shop. If you have a question about this plan, send us a message and we will be happy to help.