[Direct answer]In the Beijing area, in principle, whoever is responsible for the problem should bear the responsibility, with the focus on the root cause. If a quality problem occurs in a construction project within the warranty period and scope, the construction unit shall fulfill its warranty obligation and bear the liability for compensation for the losses caused; in the sale of commercial housing, the developer also bears the responsibility for repairing quality defects within the warranty period. That is to say, the repair costs arising from construction quality defects during the warranty period are generally borne by the construction unit or the developer. However, if the problem is not caused by quality defects, but by improper use by the owner, unauthorized alteration of the structure, damage caused by third-party construction, or force majeure, then the corresponding responsible party or the owner should bear the responsibility themselves. Therefore, to determine who should bear the costs, the key lies in identifying the cause of the defect and basing the decision on the warranty scope, warranty period, and responsibility attribution.

1. Problem background and typical scenarios

Repair disputes during the warranty period of housing and construction projects are very common. Typical scenarios include: shortly after the owner receives the house, they find wall cracks, roof leaks, and leaking windows, but the developer refuses to repair them; or the project contractor claims that the warranty period has expired and refuses to bear the cost. The disputes focus on whether the defects fall within the warranty scope, whether they occurred during the warranty period, and the causes of the defects.

II. Key points of contention

First, the determination of the warranty scope and warranty period; Second, the identification and proof of the causes of defects; Third, the determination of the starting date of the warranty period and the expiration date; Fourth, the way of bearing the expenses and losses; Fifth, the responsibility connection between developers and construction units. In practice, the identification of the causes of defects is often the basis for the division of responsibilities.

III. Professional analysis by Henglue Lawyers

The first layer concerns the scope and duration of the warranty. Relevant regulations stipulate minimum warranty periods for foundation and structure, roof waterproofing, bathrooms and exterior walls requiring waterproofing, heating and cooling systems, electrical wiring, water supply and drainage pipes, equipment installation, etc. For example, the warranty period for roof waterproofing and rooms requiring waterproofing, exterior wall leakage prevention is five years; for heating and cooling systems, it is two heating/cooling seasons; for electrical wiring, water supply and drainage pipes, equipment installation and decoration projects, it is two years. The warranty period agreed upon by both parties must not be lower than the statutory minimum. The second layer emphasizes liability based on causation. The warranty obligation is contingent on quality defects. If the defects stem from construction quality, the contractor shall repair them free of charge and compensate for losses; if they result from improper use by the owner or third-party causes, they fall outside the warranty scope and shall be borne by the responsible party. In cases of unclear causation, the determination can be made through appraisals, supervision records, and maintenance records. The third layer focuses on the responsibility interface between parties. In commercial housing transactions, buyers typically claim warranty responsibilities from developers, who then seek recourse from contractors according to construction contracts. Owners should not be evaded due to internal agreements between the construction unit and the contractor. The fourth layer addresses time limits and notifications. During the warranty period, owners should promptly file written repair requests and retain evidence, clearly stating the defects, timeframes, and claims. Beyond the statutory or contractual warranty period, claims for repair costs may be affected if delays in repair occur. Henglue Law Firm advises: When quality issues arise, owners should promptly file repair requests, preserve evidence, and apply for causation appraisals to clarify the responsible party and avoid losing claims due to insufficient evidence or exceeding the warranty period.

IV. Practical suggestions and legal basis

The first step is to review the purchase contract and the quality guarantee certificate to confirm the scope and duration of the warranty. The second step is to submit a written repair request and keep the repair records, on-site photos, and communication with the repair personnel. The third step is to apply for a professional appraisal if there are disputes over the cause of the problem to determine whether it is a quality defect or improper use. The fourth step is that if the responsible party refuses to repair, the owner can repair the problem themselves and claim the expenses, or resolve the issue through litigation or arbitration. The main legal basis includes Articles 39, 40, and 41 of the "Regulations on Quality Management of Construction Projects"; relevant provisions of the "Quality Warranty Measures for Building Construction Projects"; and the provisions on quality and warranty in the Contract Chapter of the "Civil Code of the People's Republic of China". The specific application shall be subject to the currently effective regulations.

5. Henglue Law Firm's Reminder

The warranty costs can be summarized in three sentences: If it's caused by quality defects, the construction or development unit will bear the cost; if it's caused by improper use or by a third party, the responsible party or the owner will bear the cost themselves; the cause is the key, and repair requests must be in writing, and appraisals should be conducted as soon as possible. For disputes involving project quality and warranty, you can seek assistance through the following channels:Property transactions and construction projectsThe service obtains a comprehensive solution, which involves the combination of contractual responsibilities and compensation for lossesBusiness and contract disputes in enterprisesFor reference, the sections related to the enforcement of judgments and the recovery of funds are as follows:Creditor's rights and debts, and enforcementFor any inquiries regarding difficult engineering disputes, please feel free to consult us.Special servicesTeam.

VI. Frequently Asked Questions

Q1: If there's a water leak in the house during the warranty period, who will bear the repair costs?

If it can be confirmed that it is a construction quality defect and it is within the statutory or agreed warranty period, the repair costs are generally borne by the construction unit or the developer. The owner should promptly report the repair in writing and keep the evidence; if the developer refuses to accept the responsibility on the grounds of internal agreements or the expiration of the agreed period with the construction unit, it usually cannot resist the owner's warranty claims.

Q2: When does the warranty period start?

It is usually calculated from the date of passing the completion and acceptance of the project; the warranty period of commercial housing is generally calculated from the date of delivery, subject to the provisions of the contract and the quality guarantee, and the provisions shall not be lower than the statutory minimum period. Owners should check the purchase contract and the quality guarantee to clarify the starting date and duration of the warranty for various types of projects.

Q3: If I damage it myself, is it still covered by the warranty?

It depends on the cause. Damage caused by improper use by the owner, unauthorized alteration of the structure, or damage caused by renovation is generally not covered by the warranty, and the cost shall be borne by the owner himself; damage caused by construction quality defects is covered by the warranty. If there is a dispute over the cause, it can be identified through appraisal or maintenance records to avoid misjudgment of responsibility.

Q4: If the developer delays the repair and I decide to repair it myself, will I have to pay for it?

It's possible, but attention should be paid to the approach. First, a written report of the repair should be submitted and a reasonable timeframe should be granted. If necessary, a qualified unit should be entrusted to repair the item and the relevant certificates should be preserved. After self-repairing or entrusting others to repair the item, the party responsible can claim reasonable repair costs. To avoid disputes, it is recommended to keep the repair records, on-site evidence, and repair lists, and if necessary, conduct a causality appraisal first.

Q5: Can I still request repairs after the warranty period has expired?

Generally, the warranty rights are no longer available, except in two cases: first, if the defect already existed during the warranty period and was reported for repair, but was not handled due to delay; second, if it involves quality responsibilities for the foundation, main structure, etc. within the design service life. Specifically, it should be judged based on evidence and statutory circumstances, and if necessary, claims can be made through litigation or arbitration.

The above Q&A is mainly based on the judicial practice in Beijing. There may be differences in the adjudication standards in different regions. It is recommended to consult a professional lawyer based on the specific circumstances of the case.

If you are currently facing similar problems, it is recommended that you consult a professional lawyer as soon as possible with the necessary evidence, to avoid missing the statutory time limits. →Legal services for real estate transactions·Beijing Henglu Law Firm

Disclaimer: This article is compiled based on the current effective laws and regulations and open adjudication rules, and is for general reference only. It does not constitute a formal legal opinion on specific cases. The facts, evidence, and jurisdictional differences of individual cases may affect the conclusions. If a dispute arises, please consult a practicing lawyer in time.