Birdhouse hole size chart & dimensions by species
Look up the exact entrance hole, floor size, depth, and mounting height for each backyard species — then open a page for an interactive cut-list and a printable diagram. Dimensions are curated from NestWatch, the North American Bluebird Society, and Audubon.
Birdhouse hole-size & dimension chart
| Species | Entrance hole | Hole height | Floor | Depth | Mount |
|---|---|---|---|---|---|
| Eastern Bluebird | 1.5 in round | 6 in | 5.5 x 5.5 in | 9 in | 4-6 ft |
| House Wren | 1 in round | 5 in | 5.5 x 5.5 in | 8 in | 5-10 ft |
| Black-capped Chickadee | 1.12 in round | 5 in | 5.5 x 5.5 in | 8 in | 5-15 ft |
| Tree Swallow | 1.38 in round | 6 in | 5.5 x 5.5 in | 9 in | 5-6 ft |
| Wood Duck | 4 x 3 in oval | 17 in | 8 x 9.25 in | 24 in | 6-30 ft |
Why an interactive chart?
Most birdhouse charts online are fixed images or PDFs. This one filters by hole size and bird size, and every species links to a page with a cut-list generator (enter your board width and roof style, get the board pieces) and a printable dimension diagram. The hole-size and floor specs come from established sources; the cut list is computed geometry you can adapt to your own joinery.