By Audrey HayesUpdated November 2026
Birdhouse plans for sparrows should give you a box with a 1-1/8 inch entrance hole, a floor of about 4 by 4 inches, and a side that opens for cleaning. This guide walks through a simple cedar or pine build that house sparrows will readily use, with a cut list, assembly steps and the mistakes that most often keep them away. Expect the project to take an afternoon with basic tools.
Know What Sparrows Need Before You Cut
House sparrows are cavity nesters that accept fairly plain boxes, but their needs are specific. They prefer an entrance hole around 1-1/8 inch across, a floor large enough for a loose nest of grass and feathers, and a box that stays dry. Because they nest early and often, a box that is easy to clean matters as much as the dimensions.
Shopping for one? See our guide: 5 Best Birdhouses with License Plate Roof Plans for Backyard Builders (2026).
Cut List and Materials for Sparrow Nest Boxes
Use 3/4-inch untreated softwood such as cedar, pine or fir. Avoid pressure-treated lumber and painted or stained interiors. The dimensions below produce a box roughly 6 inches tall with a 4 by 4 inch floor.
| Part | Quantity | Dimensions (inches) |
|---|---|---|
| Front | 1 | 4 x 9-1/2 (drill entrance hole here) |
| Back | 1 | 4 x 12 |
| Sides | 2 | 4 x 9-1/2 (taper top edge if you want a slanted roof) |
| Floor | 1 | 4 x 4 |
| Roof | 1 | 5-1/2 x 6 |
You will also need exterior wood screws, 1-1/4 inch galvanized nails for the roof hinge or cleat, and a few drainage holes.
Step-by-Step Assembly
- Cut all parts to the sizes above and label them front, back, sides, floor and roof.
- Drill the entrance hole in the front panel, 1-1/4 inches down from the top edge. Center it horizontally. Use a 1-1/8 inch spade or hole saw bit, and sand the edges smooth so nestlings cannot be injured.
- Drill four 1/4 inch drainage holes in the floor and two ventilation holes near the top of each side panel.
- Attach the floor to the back panel with two screws, then attach the sides to the floor and back. Keep the edges flush.
- Screw the front panel on last so it can be removed for cleaning. Use one screw at each top corner so the front swings or lifts off easily.
- Fasten the roof with a cleat or hinge so it lifts for annual cleaning. Leave a 1/2 inch overhang on all sides to shed rain.
- Mount the box with a 1/4 inch gap at the top for air flow, away from direct afternoon sun.
Mounting and Placement
Hang or mount the box 6 to 10 feet off the ground on a post, fence or building wall. Face the entrance away from prevailing winds and avoid placing it close to feeders, which can attract more competitors. Sparrows nest in populated areas, so a box near a barn, garage or shrub line usually fills faster.
Common Mistakes
- Drilling the entrance hole larger than 1-1/8 inch, which lets in starlings and larger birds.
- Using treated lumber or paint inside the box.
- Skipping drainage holes, which leads to damp nests and dead chicks.
- Making the box too shallow, so nests spill out of the floor area.
- Failing to clean out old nests after the season.
Recommended Gear
- A spade bit or hole saw set in the 1-1/8 inch range makes clean entrance holes. View on Amazon
- Exterior wood screws resist rust when the box faces weather. View on Amazon
- A small forstner bit set helps with precise drainage holes. View on Amazon
FAQ
What size hole do sparrows need?
House sparrows use an entrance of about 1-1/8 inch. Larger holes let in starlings, which compete for the same boxes.
When should I clean a sparrow box?
Remove old nesting material after the season ends, and check the box between broods if it is still in use. Clean boxes give birds a healthier start.
Can I use the same plans for other small birds?
Some cavity nesters need different hole sizes and floor dimensions. For other species, see our related plans for wren and bluebird houses before adapting this design.
Conclusion
With a 1-1/8 inch entrance, a dry untreated box and a cleanable design, these plans give house sparrows a reliable nest site. Follow the cut list, mount the box high and keep it clear of feeders. Check it each season and you will likely see use within a year.
Related reading
- House Sparrow Birdhouse Plans: Build a Nest Box That Works
- Wren Birdhouse Plans Free: Build a Cedar House in One Weekend
- Wood Birdhouse Plans Free: 6 Easy Builds With Cut Lists
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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.
