Viewing of the property is only possible by arrangement with the owner.事先跟房主说好才能看房子。Viewing is by appointment only.参观须事先预约。Viewing of the house is by appointment only.要看房只能提前预约。House for sale, two bedrooms. Viewing by appointment only.两居室出售，看房请务必预约。Viewing is only allowed by appointment.参观需要预约。