Whether you buy a house or sell a house through an intermediary company, you need to pay a service fee. If you buy a house through an intermediary company, you usually have to pay 3% of the house as an intermediary fee, which costs 18000 yuan. If you sell a house through an intermediary company, you usually have to pay 1% as an intermediary fee, which costs 6000 yuan. However, there are many domestic intermediary companies at present, and the charging ratio is different. If you plan to sell or buy a house through an intermediary company, you must remember to ask the staff about the charging ratio in advance.