Chicken coop plans that start from a cut list, not a sketch
Most free chicken coop plans online are drawn for one fixed flock size, with a materials list that says "lumber as needed." Coop Build Plans works the other way: you enter your hen count, and a cut list engine works out the framing, panel layout and hardware for that exact build, on stock 8, 10 and 12 ft lumber and 4x8 ft sheet goods.
Every plan includes a dimensioned start-here page, a cut list that packs your lumber onto real stock lengths, a panel layout showing how the sheathing is cut from full sheets, a step-by-step assembly order generated from the geometry, and a full bill of materials as both a PDF and a JSON file.
Try the free Coop Size Planner to see the floor space, run space, roost length, nest boxes and ventilation your flock needs, then get the free 4-Hen Starter Coop plan or one of the paid builds: Raised Coop, A-Frame Tractor, Walk-In 6x8, Walk-In 8x8 and the attached Run Add-On.
The space and roost figures come from Penn State Extension poultry housing guidance. Each plan page lists the checks the engine ran on that design, with the numbers it used: square feet per bird, inches of roost per bird, ventilation opening, nest boxes, and the framing spacing behind the cut list.
How the sizing works
- Enter how many hens you keep and their breed size, since a bantam and a heavy breed do not need the same floor
- Enter your climate, which changes the ventilation opening and how the coop is closed in winter
- The planner returns coop floor area, run area, roost length, nest box count and ventilation opening
- Pick the build that suits your site: raised, walk-in, movable tractor, or a run attached to what you already have
Why flock size changes the whole build
Coop dimensions are not a matter of taste. Too little floor and hens start feather pecking in winter when they are shut in; too little roost and the bird at the end of the bar sleeps in the nest boxes and fouls the eggs. Roost length, nest box count and ventilation all scale with the number of birds, which is why a plan drawn once for a fixed flock stops fitting the moment your flock changes.
Predator proofing is not optional
The most common loss is not a fox through a wall, it is a raccoon through a latch or a weasel through chicken wire. Three details do most of the work: half inch hardware cloth instead of chicken wire on every opening, two step latches that a paw cannot work, and a buried or aproned skirt of hardware cloth extending outward at ground level so nothing digs under the edge. The plans call for hardware cloth throughout for exactly this reason.
Build procedure after you download the cut list
Start by checking the site before cutting lumber. Mark the coop footprint with stakes, then measure both diagonals. If the diagonals differ by more than 1/2 in, correct the layout before you place blocks, skids, or posts. A small error at the base becomes a door that rubs and roof panels that do not land on framing.
Sort the lumber by length and straightness. Use the straightest boards for wall plates, door frames, and roof edges. Use bowed boards only where they can be pulled into position by sheathing. Label each cut piece with a pencil as soon as it leaves the saw. A simple code such as W1, W2, R1, and D1 prevents most assembly delays.
- Cut all repeated framing parts first, then stack them by wall or roof section.
- Dry fit the floor frame and measure diagonals before fastening the sheathing.
- Build wall panels flat on the floor deck when possible, then stand them and brace them plumb.
- Install roof framing before wall sheathing if wind is expected, because open frames are easier to square.
- Hang the main door before installing trim around it, leaving about 1/8 in clearance at the latch side and top.
Plan a realistic work sequence. One person can cut and preassemble small panels, but lifting a wall or roof section is safer with two people. For a small raised coop, allow one day for cutting and floor framing, one day for walls and roof framing, and one day for hardware cloth, doors, trim, and final checks. A walk in coop often needs a fourth day, especially if the site is not level.
Tools, setup dimensions, and field tolerances
The build is easier if the tool setup is treated like part of the plan. A circular saw can make every cut, but a miter saw speeds repeated studs, blocking, and rafters. Use a sharp blade for sheet goods so panel edges stay clean enough to land on framing. Keep a 4 ft level, tape measure, speed square, chalk line, clamps, drill, driver bits, tin snips for hardware cloth, and eye and hand protection close to the work area.
| Item to check | Useful figure | Why it matters |
|---|---|---|
| Base diagonal difference | 1/2 in maximum on small coops | Keeps walls square and roof edges even |
| Door clearance | About 1/8 in at top and latch side | Allows swelling without leaving a predator gap |
| Hardware cloth overlap | At least 2 in at seams | Gives room for staples or screws and washers |
| Ground skirt width | 18 to 24 in outward from the wall line | Stops digging at the edge of the coop or run |
| Roof overhang target | 6 to 12 in where the design allows it | Reduces splashback on walls and vents |
Use exterior rated fasteners and separate structural fastening from mesh fastening. Staples alone can loosen in soft wood, so hardware cloth is better retained with screws and washers or a batten over the edge. At corners, fold the mesh rather than cutting it if the bend is clean. Every cut edge should be covered, tucked, or fastened so it cannot snag skin or feathers.
If the generated plan uses a floor deck, keep the underside dry during construction. Wet sheet edges swell quickly. If rain is likely before the roof is on, cover the floor with a tarp and leave air space at the sides so trapped moisture can escape.
Frequent mistakes and practical recovery
The most common cutting mistake is losing track of saw kerf on repeated parts. If a board is laid out with marks touching end to end, each cut removes about 1/8 in. After several cuts, the final piece can be short. Recover by recutting the short part as blocking or trim, then take the replacement from a longer offcut before cutting new stock.
If a wall panel is out of square, do not force sheathing onto it and hope the roof will hide the error. Lay the panel flat, pull the long diagonal inward with a clamp or temporary strap, and remeasure. Fasten one sheet edge only after the diagonals match. Sheathing is a square brace, but only if it is installed while the frame is square.
If the door binds after the coop is moved or loaded with bedding, check the base first. Shim the low corner before planing the door. A 1/4 in lift under one skid or block can bring the frame back into plane. If the door gap is already too large, add a stop strip inside the frame rather than leaving daylight at the latch side.
If a hardware cloth seam lands between studs, add a wood backer behind the seam. Do not bridge a loose seam with only wire ties. A raccoon can work a flexible seam for hours. For more sizing and build questions, use the site FAQ before changing the structure shown in the generated plan.
Special cases that change the build order
On a sloped site, level the support points before framing the floor. Do not build a level coop by trimming wall heights. For small slopes, compacted gravel and solid blocks can correct the base. For larger slopes, posts or skids need separate layout so the floor frame remains rectangular and the door side stays plumb.
In very wet ground, raise wood away from standing water and keep the apron near the surface instead of burying it deep in mud. Pin the skirt flat, cover it with soil, gravel, or pavers, and inspect it after heavy rain. In snow country, keep lower vents from becoming blocked by drifts and place at least part of the ventilation high under the roof line.
For heavy breeds, check pop door height, roost access, and landing space before final fastening. A ramp that is comfortable for light birds can be awkward for large hens if it is too steep. A practical target is to keep the ramp angle near 30 to 40 degrees when space allows, with cleats spaced about 4 to 6 in apart.
If you expect to expand the flock, choose the next larger layout from the plans instead of crowding the first coop. Adding birds later affects floor area, roost length, ventilation, manure load, and run wear at the same time.
