When choosing nesting sites near homes, house mice will construct nests outdoors in ground burrows, barns and sheds, and will construct nests indoors in attics, wall voids, storage boxes, and under appliances. Norway rats construct burrows outside along foundations and gardens or may be found inside homes, in basements and crawl spaces. Excellent climbers, roof rats prefer to nest in trees, rooflines, block walls, attics, garages, sheds and in ceilings.