Is it legal to install elevators and swipe cards privately in the property?

Legal analysis: installing elevator device changes the scope of property contract. According to the relevant laws and regulations, the consent of the owners' committee is required, and the property violates the contract without authorization. Property management refers to the activities in which the owner selects a property service enterprise, and the owner and the property service enterprise, in accordance with the property service contract, repair, maintain and manage the houses, supporting facilities and related sites, and maintain the environmental sanitation and related order in the property management area.

Legal basis: Article 34 of the Property Management Regulations, the owners' committee shall conclude a written property service contract with the property service enterprise selected by the owners' congress. Property service contracts shall stipulate property management matters, service quality, service fees, rights and obligations of both parties, management and use of special maintenance funds, property management premises, contract term, liability for breach of contract, etc.