Accessory buildings and accessory uses. The accessory buildings and accessory uses permitted on a lot are those which are customarily incidental to the principal building or principal use on the lot. By way of example, in the case of a single-family house the following accessory buildings and accessory uses are permitted on the lot with the house: off-street parking spaces, private garage, carport, storage shed, toolshed, residential swimming pool, cabana, gazebo, garden, garden house, greenhouse, plant nursery, tree nursery.