The Ultimate Birdhouse Dimensions Chart by Species

A birdhouse isn’t “one-size-fits-all.” Building or buying a house with the correct dimensions is the single most important factor for attracting specific birds and, more importantly, keeping them safe. This guide provides the precise measurements you need for a successful backyard habitat.

Why Dimensions Matter

Entrance Hole

The security gate. The correct diameter keeps larger, aggressive birds and predators out while allowing your target species in.

Floor Size

The living room. It must be large enough to comfortably hold a clutch of eggs and growing nestlings.

Cavity Depth

The safety zone. A deep cavity prevents predators like raccoons or cats from reaching in from the entrance hole to harm the nest.

Mounting Height

The neighborhood. Different species feel safest at different heights, from just above head-height to high up in mature trees.

Birdhouse Dimensions Chart

Use the search box below to instantly find the bird you’re looking for. All dimensions are in inches.

Bird Species	Entrance Hole (Diameter)	Floor Size (L x W)	Cavity Depth	Mounting Height (Feet)
House Wren	1 1/8″	4″ x 4″	6-8″	5-10′
Carolina Wren	1 1/2″	4″ x 4″	6-8″	5-10′
Black-capped Chickadee	1 1/8″	4″ x 4″	8-10″	5-15′
Tufted Titmouse	1 1/4″	4″ x 4″	8-10″	5-15′
White-breasted Nuthatch	1 1/4″	4″ x 4″	8-10″	5-20′
Downy Woodpecker	1 1/4″	4″ x 4″	9-12″	5-15′
Hairy Woodpecker	1 1/2″	6″ x 6″	12-15″	8-20′
Tree Swallow	1 1/2″	5″ x 5″	6-8″	5-10′
Violet-green Swallow	1 1/2″	5″ x 5″	6-8″	10-15′
Eastern Bluebird	1 1/2″	5″ x 5″	8-10″	4-7′
Western Bluebird	1 9/16″	5″ x 5″	8-10″	4-7′
Mountain Bluebird	1 9/16″	5″ x 5″	8-10″	4-7′
Purple Martin	2 1/8″	6″ x 6″	6″	15-20′
Northern Flicker	2 1/2″	7″ x 7″	16-18″	8-20′
American Kestrel	3″	8″ x 8″	12-15″	10-30′
Eastern Screech Owl	3″	8″ x 8″	12-15″	10-30′