You can't. Waterfront electricity cannot be paid, because the water and electricity must be regular water and electricity when the house is handed over, not waterfront electricity. If the developer uses waterfront electricity when handing over the house, the owner can check the purchase contract. If it is clearly stipulated that water, electricity and other conditions are met when the house is handed over, it is that the developer has breached the contract, and the owner can claim compensation or refuse to accept the house, so the house cannot be handed over.