Is it illegal for developers not to provide water and electricity?

Legal analysis: it needs to be based on the contract signed by both parties and the actual performance. There is no basis for asking developers to provide construction drawings. You can ask the other party to provide "three copies, one certificate and one form". The property will not voluntarily provide the owner with the water and electricity drawings, but can ask the property to see the water and electricity drawings when necessary, and the property shall provide the drawings to the owner in time.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 277 An owner may establish an owners' meeting and elect an owners' committee. The specific conditions and procedures for the establishment of the owners' congress and the owners' committee shall be in accordance with the provisions of laws and regulations. The relevant departments of the local people's government and the residents' committee shall give guidance and help to the establishment of the owners' congress and the election of the owners' committee.

Article 287 The owner has the right to require the construction unit, the realty service enterprise or other managers and other owners to bear civil liability for acts that infringe upon their legitimate rights and interests.