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HomeAll Real CasesHomebuyer Wins Unjust Enrichment Claim for 1200 Yuan Water Meter Fee

Homebuyer Wins Unjust Enrichment Claim for 1200 Yuan Water Meter Fee

All Real CasesMay 29, 2026 4 min read

Homebuyer Wins Unjust Enrichment Claim for 1200 Yuan Water Meter Fee

Case Overview
In a notable consumer rights case from Eastern China, a homebuyer successfully sued a real estate developer for unjust enrichment after being charged 1200 yuan for a water meter installation. The court ruled that the developer improperly collected this fee on top of the agreed purchase price for an affordable housing unit, ordering a full refund plus interest. The case highlights the limits of what developers can charge beyond the contracted sale price for essential housing infrastructure.

Case Background and Facts
Mr. Chen, the plaintiff, purchased an affordable housing unit in a residential community from Zhejiang Affordable Housing Development and Construction Company, the defendant, in 2003. At the time of property handover, the developer collected 1200 yuan from Mr. Chen under the label of a water meter collection fee. Mr. Chen paid this amount without immediate objection. In 2010, Mr. Chen learned from other residents that similar fees had been challenged in court and deemed improper. He then sought repayment of the 1200 yuan plus interest calculated from the payment date. The developer refused, arguing the fee was justified by design changes and actual costs incurred.

Court Proceedings and Evidence
Mr. Chen initiated legal proceedings in December 2010. The court held a public hearing in January 2011. Mr. Chen submitted his purchase contract, property certificate, the receipt for the 1200 yuan water meter fee, and a prior court judgment from a related case that found similar charges constituted unjust enrichment. The developer presented evidence including original construction drawings showing no smart water meters, a government pricing approval document from 2001 that did not include water meter costs, design change orders from late 2001 adding the meters, completion drawings, and cost reports showing actual expenses of 1318.89 yuan per unit for the water meter system. Both parties agreed on the authenticity of each other’s documents but disputed their relevance.

Court Findings and Judgment
The court identified two main issues. First, whether collecting the water meter fee constituted unjust enrichment. The court held that water supply facilities are essential infrastructure for habitable housing, and a developer’s contractual duty includes providing such basic amenities. Since the purchase contract contained no separate agreement for water meter costs, the original sale price already covered these expenses. A government pricing authority had already ruled that the developer’s collection of this fee was an improper price increase for affordable housing. Therefore, the developer’s retention of the 1200 yuan was unjust enrichment. Second, regarding the statute of limitations, the court applied the rule that the limitation period for unjust enrichment claims begins when the plaintiff knows or should know of the enrichment and the obligor. The developer failed to prove Mr. Chen knew or should have known the fee was improper at the time of payment. The court accepted Mr. Chen’s claim that he only learned of the unjust enrichment in 2010 when related case notices were posted in the community. His December 2010 lawsuit was therefore timely. The court ordered the developer to return the 1200 yuan plus interest at 5.76 percent per annum from the day after payment until full repayment.

Key Legal Principles
The court applied the principle that a party who benefits without legal cause at another’s expense must return the benefit. In real estate transactions, developers cannot charge extra for essential infrastructure that is already included in the contractual sale price unless there is a specific agreement. The statute of limitations for unjust enrichment claims runs from when the victim actually discovers the improper charge, not from the date of payment.

Practical Insights
This case serves as a caution for homebuyers to scrutinize all fees charged at property handover. Developers must ensure any additional charges are clearly authorized by the purchase contract or applicable regulations. Buyers who suspect improper fees should act promptly upon discovery, but the limitation period may not begin until the buyer has actual knowledge of the impropriety. Government pricing rulings can provide strong evidence in such disputes.

Legal References
General Principles of the Civil Law of the People’s Republic of China, Article 92. Opinions of the Supreme People’s Court on Several Issues concerning the Implementation of the General Principles of the Civil Law of the People’s Republic of China (Trial Implementation), Article 131.

Disclaimer
This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for specific legal matters.

This article is rewritten from public court documents for general reading only. It does not constitute legal advice. Consult a qualified attorney for specific legal matters.

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