It is always important that a new structure be built upon its own lot, and particular care should be taken when the plans call for a building to run along the lot line. A surveyor should be employed who will locate the lot lines and mark the corners. The builder should then keep within the lines indicated. It is wise to have the surveyor survey the property from time to time as the work progresses in order to guard against encroachments by careless building, such as leaning or bulging walls.