Bats are protected in Texas, so this is not an extermination job. It is a timed, legal exclusion, and doing it wrong can seal flightless young inside your attic.
Bats in the attic? They cannot just be exterminated, because Texas law protects them, so this has to be done a specific, legal way. We put up one-way exits that let the bats fly out and not back in, then seal the openings, and we time the work around summer so no flightless young get sealed inside.
Under Texas Parks and Wildlife Code, bats may not be hunted or killed, with a narrow exception for one inside an occupied building, and killing a colony with chemicals is not permitted. So bat work is exclusion, not extermination: one-way devices that let the colony fly out to feed and block re-entry, then permanent sealing once they are all out.
Texas Parks and Wildlife discourages bat exclusion from May 1 through August 15, because during those months the young cannot yet fly and would be sealed inside if the adults were excluded. We plan the exclusion around that window so no bats are entombed in your attic, and seal the roofline afterward.
Free inspection, a straight answer on what the house needs, and the price you were quoted.