DIY Wraparound Chicken Coop Plans: 12x10 Walk-In Inside U-Shaped Run

DIY wraparound chicken coop plans for a 12x10 walk-in coop inside a U-shaped walk-in run, all under one shed roof, for 20-25 hens. Step-by-step PDF.

- Product: Brookhaven wraparound walk-in chicken coop inside a U-shaped walk-in run under one single-slope roof, building plans
- Format: Digital PDF download
- Pages: 71
- Paper Size: US Letter
- Units: Imperial (feet and inches); main sizes also given in mm
- Dimensions: 12' x 10' coop inside a 24' 5" x 17' U-shaped run; 26' 6-1/2" L x 19' 1-1/2" D over the roof; 12' 8-5/16" at the high back edge
- Style: Coop-in-run design with one 3/12 single-slope shed roof, dusty-rose board-and-batten, white trim and a cedar run frame
- Skill Level: Intermediate
- Includes: 29 illustrated build steps, shopping list, master cut list, cut diagrams, panel layouts, framing drawings, rafter, step and cutting templates, board-and-batten tables, elevations, floor plan and cross sections
- Best For: Backyard flocks of 20 to 25 hens
- Delivery: Instant PDF download after purchase, no physical item shipped

## What's Included in This Wraparound Chicken Coop Plan

The Brookhaven keeps everything under one roof. The dusty-rose board-and-batten coop with white trim stands at the back, and a cedar-framed walk-in run wraps round it on three sides, down both ends and right across the front, so the coop door, its three steps and the front casement all open into the covered run. One wide single-slope roof covers the whole footprint, low over the run door at the front and rising to the back, where the outside nest box hangs at chest height between two high casements.

- 12' x 10' walk-in coop with 107 sq ft of floor inside, 7' 2-1/2" high at the front wall rising to 9' 6-3/4" at the back wall, on short posts with the floor 2' 1-1/2" up
- U-shaped walk-in run 72" wide down each side and 84" across the front, with about 290 sq ft of ground, all under the roof, and 6' 11" clear under the front beam
- 31-1/2" x 77" run door in the middle of the front, and a cedar Z-brace coop door 32" x 72-1/2" up three steps inside the run
- Outside nest box on the back wall with 5 nests at chest height and a shingled lid for collecting eggs without going in
- Three 110" roost bars with 330" of perch over a removable dropping board
- Two guillotine pop doors, one in each end wall, each with a cleated ramp into the run
- Three six-lite casement windows, louvered vents high in both end walls and screened eaves front and back
- Shed roof at 3/12 with 15 identical one-piece 2x8 rafters, ice-and-water membrane, architectural asphalt shingles and a 26-1/2 ft gutter along the front eave
- 1/2" hardware cloth on the run with a 24" apron all round
- Estimated material cost of about $7,400 to $9,600 (prices vary by region and season)

## Chicken Coop Inside a Covered Run for 20 to 25 Hens

The coop gives 4.3 to 5.4 sq ft per hen and the U-shaped run gives 11.6 to 14.5 sq ft per hen, so this large chicken coop houses 20 to 25 chickens. The 5 nests follow the rule of one nest for every 5 hens, and the three roosts give about 13" of perch per hen at 25.

## File Format, Paper Size and Measurements

The plan is a 71-page PDF on US Letter paper. All dimensions are in feet and inches for standard US lumber, with the main sizes also listed in millimeters. Drawings are not to scale, so always use the written dimensions.

## Who This Walk-In Chicken Coop Plan Is For

This is an intermediate build for DIY builders who are comfortable with a circular saw, a jigsaw, a drill/driver, an impact driver and basic framing. Two people can build it in about 10 to 12 weekend days, plus painting. Spring is the busiest building season, so fall and winter are a good time to price lumber and prepare the site before new chicks arrive. It also makes a practical gift for a backyard chicken keeper.

## How to Use the Plan

1. Buy the plan and download the PDF.
2. Print the shopping list and the master cut list, or open them on a tablet.
3. Buy the lumber, panels, roofing and hardware.
4. Follow the 29 build steps in order, from the site layout and footings to the final details and move-in.

## Digital Product Note

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

## Terms of Use

This plan is for personal use. You may build as many coops as you like for yourself. You may not resell, share or publish the PDF, its drawings or its renders, and you may not build coops from it for sale without written permission.

## Frequently Asked Questions

### Why put the chicken coop inside the run?

The coop door opens into the covered run, so you never step out into rain or mud to reach it, and the hens cannot slip out when you go in. The U-shaped run also gives them the most run area for the footprint, about 290 sq ft round a 120 sq ft coop.

### Can I make the U-shaped run wider at the sides?

Yes, up to 8 ft. Add rafters at 24" on center, lengthen the side beams and move the end posts out; the coop and the front row stay as drawn.

### Is a 3/12 shed roof steep enough for shingles?

Yes. 3/12 is above the 2/12 minimum of most shingle makers, provided the whole deck gets ice-and-water membrane or a double layer of underlayment, as shown in the plan.

### Do I need a building permit for this chicken coop?

It depends on your town. The coop floor is 120 sq ft, the roof about 521 sq ft and the high edge about 12' 8-5/16", so check your local rules before you build.

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

After checkout you get a download link on the order confirmation page and by email. Click it to download the PDF and save it to your computer, tablet or phone.

## More Building Plans from KRMPLANS

Browse the KRMPLANS shop for more chicken coop plans, sheds, greenhouses and cabins. If you have a question about this plan, send us a message and we will be happy to help.