Is it illegal for property to raise property fees at will?

Legal analysis: Of course it is illegal.

Legal basis: Article 40 of the Regulations on Property Management should follow the principles of reasonableness, openness, and adaptation of fees and service levels, and distinguish the nature and characteristics of different properties. Owners and property service enterprises shall, according to the measures for charging property services formulated by the competent price department of the State Council in conjunction with the competent construction administrative department of the State Council, stipulate in the property service contract.