Our bat houses are approved by Merlin Tuttle's Bat Conservation

Design and Construction

BCM bat houses are designed and constructed specifically to collect and trap heat to meet key bat roosting needs. A relatively wide, airtight roof is an important solar heat collector. The bat house is tall with ventilation slots 1/3rd from the bottom to create an attractive interior temperature gradient. A landing pad provides a large easy target for bats on approach and recessed baffles form an overhang for some protection. Crevice dimensions average between a snuggly 3/4”, 7/8’’ and 1.5’’ depending on the model bat house, and certain models such as the ColonyLodge and Super Rocket Roost include more than one size. This spacing preferred by most common house bats in the U.S. and Canada. Hand roughened interior surfaces are in random directions providing a safe, permanent gripping texture for bats, especially newborn pups. UV resistant plastic exteriors and/or roofs extend the life of the bat house by protecting against sun, water, snow, and ice. All joints are heavily glued during assembly to help the bat house trap heat, and parts are fastened together with screws for longest life. BCM designers take all these points seriously when constructing bat houses, and so should you if assembling a DIY kit.


Your most critical responsibility as a new bat house owner is also where you get to exercise your personal creativity. A finished wood house must be painted, stained, or sealed an appropriate color in order to seal micro-crevices and absorb heat.
The rest comes down to “location, location, location.” 

Bat House Placement

Your bat house can be installed on an existing building, but only after carefully assessing the amount of daily solar exposure at the site. Most often the best solution is to mount the bat house on a post located in a sunny spot on the property, or perhaps the sunny side of an appropriate building. To securely attach the box to a wood post or wall, a specially designed Mount Kit is available from BCM which includes bolts or screws appropriate for your intended location. Your BCM bat house is modular; we have kits and DIY suggestions on expanding your colony when the time comes using the same 4’’x6’’ post you started with. But, before rushing out to install your new bat house, take a few moments to consider: (1) the best location on your property for your new tenants, and (2) once installed, it is unlikely that you will want to un-install your house to tweak its look or improve its weather-resistance. Read on to learn more about locating and putting key finishing touches on your bat house.

Learn more about installing bat houses . . .

Backyard Bat Houses

Learn the differences between our base bat houses suitable for starting backyard bat colonies.

Bat Houses

Siting and Color

Consider the options on where to locate your bat house so it's good for bats and -for you-.

Siting and Color

Installing a Bat House

Trees, buildings, or poles?
Installing a bat house on something high can be a job, here are suggestions on how to move it along.

Install a Bat house

Maintaining a Bat House

Our bat houses are low maintainance, but there are some long term situations to be aware of.


Human Health Concerns

Bats attract more than their fair share of negative press, here are some facts to help prospective bat landlords rest easier.

Human Health Concern