By Audrey HayesUpdated November 2026
Free barn birdhouse plans give you a simple, sturdy nest box with a gabled roof and a red-painted look that suits a backyard fence or pole. This guide walks you through a basic barn design with a full cut list, the joinery to use, and the dimensions that work for common cavity nesters like chickadees, wrens and bluebirds. You can finish the build in one afternoon with basic tools.
Materials and Cut List
Use untreated cedar, pine or cypress at least ¾ inch thick. Rough-sawn cedar is a good choice because it holds up to weather without paint and gives birds better grip on the entrance. Cut the following pieces from a single 1×6 board about 6 feet long:
Shopping for one? See our guide: 3 Best Free Printable Octagon Birdhouse Plans Frees (2026): Our Picks.
- Two front and back walls: 6 inches wide × 9 inches tall, with the top corners cut at a 45-degree angle
- Two side walls: 5½ inches wide × 8 inches tall (sloped to meet the roof pitch)
- Floor: 5 inches × 5 inches, with four ¼-inch drainage holes
- Two roof panels: 7 inches × 8 inches each
- Entrance hole template: 1¼ inches in diameter for chickadees and wrens, or 1½ inches for bluebirds
Cut all parts square and label them before assembly. Small errors compound quickly in a box this size.
Assembling the Barn Frame
Start by attaching the side walls to the floor with exterior-grade wood glue and 1¼-inch galvanized or stainless steel exterior screws. Pre-drill every hole to prevent splitting, especially near the ends of cedar boards. Leave the floor slightly inset from the bottom edge of the walls so water runs off instead of pooling.
Next, attach the front and back walls. Keep the entrance hole on the front panel, about 6 to 7 inches above the floor, which keeps predators from reaching in easily. Confirm the box is square by measuring both diagonals before the glue sets. They should match within ⅛ inch.
Setting the Roof
Fasten the two roof panels with a slight overhang of about 1 inch at the front and back. This overhang shades the entrance and sheds rain. Use a hinged roof or a removable panel if you plan to clean the box each fall, since most cavity nesters benefit from annual cleanouts.
Finishing and Mounting Your Birdhouse
Leave the interior unfinished and rough so young birds can climb out. Do not paint or stain the inside. On the exterior, use a water-based, non-toxic stain or leave the wood natural. Avoid lead-based or solvent-heavy finishes that can harm birds.
Mount the house 5 to 10 feet off the ground on a pole or post, facing away from prevailing winds and away from direct afternoon sun. Position it where it gets morning light and some shade.
Recommended Gear
- Exterior wood glue: Adds strength to the joints beyond screws alone. View on Amazon
- Stainless steel exterior screws: Resist rust over many seasons outdoors. View on Amazon
- Forstner or spade bit set: Cuts clean entrance holes without tearing the front panel. View on Amazon
Common Mistakes to Avoid
- Using pressure-treated lumber, which can release chemicals harmful to birds.
- Making the entrance hole too large, which lets in starlings and house sparrows that compete with native species.
- Skipping drainage holes in the floor, which leads to damp nests and mold.
- Painting the interior or sealing the seams completely, which traps heat and moisture.
- Mounting the house in full sun, which can overheat nestlings in summer.
For more size-specific builds, see Wren Birdhouse Plans Free: Build a Cedar House in One Weekend for a smaller box, or Eastern Bluebird Birdhouse Plans: Free Dimensions and Build Steps for bluebird-specific dimensions. If you want a different style, Octagon Birdhouse Plans Free: Build One in a Weekend offers another approachable build.
FAQ
What wood is best for free barn birdhouse plans?
Untreated cedar is the most common choice because it resists rot without chemicals. Pine and cypress also work if they are left unfinished on the inside.
What entrance hole size should I cut?
Use about 1¼ inches for chickadees and wrens and 1½ inches for bluebirds. Keeping the hole to these sizes helps exclude larger competing birds.
How often should I clean the birdhouse?
Clean it once a year after the nesting season ends, usually in late summer or early fall. Remove old nesting material and check the roof and screws for wear.
Conclusion
With a single 6-foot board and basic tools, you can build a sturdy barn birdhouse that suits many backyard species. Follow the cut list, keep the interior rough and unfinished, and mount the house where it gets shade in the afternoon. Check it each year and your house should serve birds for many seasons.
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About Audrey Hayes
Audrey Hayes is part of our editorial team and reviews and edits our woodworking guides, checking product details against manufacturer specifications and owner feedback.
