The developer has not opened the natural gas when delivering the house. If it is caused by an objective third party, the developer is not responsible, for example, the municipal pipeline has not been laid in place. At present, there are no relevant laws and regulations in this regard. How long must natural gas be supplied. If the owner can collect sufficient evidence, it can sue the developer, but it is not valid to say that the developer conceals the fact that the gas has not been opened only based on his subjective will. The law is based on evidence rather than empty words.
 Legal basis
 Article 583 of the Civil Code of the People's Republic of China [Liability for damages for breach of contract] If a party fails to perform its contractual obligations or performs its contractual obligations in a manner inconsistent with the agreement, and after performing its obligations or taking remedial measures, the other party has other losses, it shall compensate for the losses.
 Article 584 of the Civil Code of the People's Republic of China [Scope of damages] If one party fails to perform its contractual obligations or fails to perform its contractual obligations in accordance with the agreement, resulting in losses to the other party, the amount of damages shall be equal to the losses caused by the breach of contract, including the benefits that can be obtained after the performance of the contract; However, it shall not exceed the possible losses caused by the breach of contract that the breaching party foresaw or should have foreseen when concluding the contract.