[Direct answer]In the Beijing area, it's not a general rule to judge the severity of cracks based on three dimensions: location and cause (cracks on the surface of the plaster layer are visual defects; structural cracks (through beams and columns, load-bearing walls, and oblique settlement cracks) are serious quality problems); width and direction (cracks above 0.3 mm, through cracks, and oblique developing cracks require vigilance); development trend (stabilized cracks and continuously expanding cracks are evaluated differently); and identification relies on professional appraisal — the structural safety appraisal report issued by housing safety appraisal institutions is the only authoritative basis for qualitative evaluation; conclusions affect claims: structural problems can be claimed for repair and compensation according to quality defects, and in cases of safety risks, buyers can request to withdraw from the contract; visual defects can be handled within the warranty scope.

I. Problem Background and Typical Scenarios

When receiving the new house, the owner found a crack running through the living room wall, which scared him into thinking the house might collapse. The developer said, "It's normal settlement and mortar cracking. Just fix it up." The owner wasn't sure whether the crack was just an aesthetic issue or a structural problem—if he misjudged it, his approach to protecting his rights would be completely wrong.

II. Key points of dispute

First, a professional distinction between the types and causes of cracks. Second, the initiation of appraisal and the selection of institutions. Third, the identification of responsible parties. Fourth, claim proposals corresponding to different conclusions.

III. Professional analysis by Henglue Lawyers

The first layer is the qualitative grading of cracks: visual defects - cracks in plaster and putty layers caused by shrinkage, with irregular patterns on the surface and no structural impact, which fall within the scope of warranty and repair; general quality defects - cracks in non-load-bearing walls with small width but penetrating the base layer, requiring repair and appropriate compensation; serious quality issues - cracks in main structures (load-bearing walls, beams, slabs, columns), identified as affecting structural safety or failing to meet design requirements, which constitute serious quality problems. The buyer may claim reinforcement and repair, compensation, or even rescission of the contract and return of the property (according to the Judicial Interpretation of Commercial Housing: If the main structure of the house is unqualified and cannot be delivered for use, or if it is confirmed to be unqualified after inspection, the buyer may rescind the contract and claim compensation). The key words for judgment are "load-bearing", "penetrating", and "settlement and skew". The second layer is the practical appraisal process: - Unilateral commissioning - Engage a qualified housing safety appraisal institution (listed by the housing and urban-rural development department) to conduct a structural safety appraisal and causality analysis. - In litigation, if the other party disputes the appraisal results, refer the matter to judicial appraisal, with the buyer bearing the initial appraisal costs and the developer subsequently reimbursing them based on liability. - Key appraisal points include: measuring the width, length, and direction of cracks; observing their development (using gypsum boards to observe whether they spread); rebound testing of concrete cores; and settlement observation. - Time sensitivity: Continuously monitor settlement-related cracks, as early data determine causality identification and trigger immediate record-keeping. The third layer focuses on identifying the responsible parties: - During the warranty period - The warranty period for main structures is the reasonable service life specified in the design documents (decades), with developers directly responsible for structural issues and compensating according to the appraisal results. - For construction-related issues, developers are liable to buyers and may seek recourse from contractors (buyers need not concern themselves with internal allocation). - For decoration-induced damage - Decoration companies responsible for structural alterations. - For adjacent construction-induced issues - Claim against third-party contractors (e.g., subway, foundation excavation) for settlement-related cracks, with attention to their project insurance and monitoring reports (third-party monitoring data are key evidence, which can be obtained through government information disclosure). The fourth layer outlines corresponding claim strategies: - For visual defects - Insist on warranty repair and standardized restoration (secondary inspection of repaired areas), with tougher stance leading to appropriate compensation. - For general defects - Cover repair costs and compensation during the repair period (removal, rental), as well as property losses. - For structural issues - Implement limited-time reinforcement and repair plans, with compensation for unsuccessful repairs or substandard results. - For collective rights protection - Combine multiple unit appraisals to share costs for entire building structural issues (uneven settlement, insufficient concrete strength) that cannot be resolved individually, necessitating joint efforts.

IV. Practical suggestions and legal basis

The first step is to identify the cracks, take photos and conduct mapping, and then use gypsum boards to expand the observation scope. The second step is to commission a qualified institution to conduct appraisal and qualitative analysis. The third step is to match the warranty, repair, or claim for a refund based on the conclusions, and send a written letter to the developer. The fourth step is to identify the corresponding responsible parties for third-party or construction-related issues, and jointly protect rights and interests. The main legal basis includes Article 40 of the "Regulations on Quality Management of Construction Projects", Article 33 of the "Measures for the Sale of Commercial Housing", Articles 12 and 13 of the "Interpretation of the Supreme People's Court on Several Issues Concerning the Application of Law in the Trials of Disputes over Contracts for the Sale of Commercial Housing", and Article 577 of the "Civil Code". Specific applications shall be subject to the currently effective provisions.

5. Henglue Law Firm's Reminder

Three key points about wall cracks: Determine the severity based on the location and direction; structural cracks and plaster cracks are completely different; the appraisal report is the only authoritative standard; observe the gypsum board from the day it was discovered; contact the developer during the warranty period, and if the structure is unqualified, you can request a refund. For disputes involving wall cracks, you can seek legal assistance through the following channels:Real estate transactions and construction projectsWe can provide a comprehensive solution for the service, which includes the engineering responsibilities that can be integrated together.Business and contract disputes in enterprisesFor plates, if there are any damages caused by third-party construction, you can refer to the relevant provisions for reference.Special servicesFor any questions regarding difficult cases, you can consult the columnSpecial services and other casesColumn.

VI. Frequently Asked Questions

Q1: What kind of cracks should we be wary of?

Any of the following situations shall trigger a professional appraisal: penetrating cracks on load-bearing walls and beams, forty-five-degree diagonal settlement cracks, and cracks with a width exceeding 0.3 mm and continuing to expand.

Q2: How much does the appraisal cost, and who will bear the cost?

The cost ranges from thousands to tens of thousands of yuan, depending on the area and the number of projects. The cost is paid upfront, and then the party at fault will bear the responsibility. The cost of group appraisal can be shared among all parties involved.

Q3: Can I still claim compensation even though the developer has already made repairs?

Yes; repairing something doesn't mean exempting oneself from liability. Even after the structural causes have been repaired, claims can still be made for losses, depreciation, and monitoring period expenses, and the repair records should be preserved.

Q4: Can I claim compensation for the depreciation of the house value caused by the cracks?

Claims for depreciation losses can be made if the problem is identified as a structural issue and there is evidence of depreciation (assessment report); however, the probability of successful claims for depreciation due to visual defects is low.

Q5: Who should I contact if the construction site next door causes cracks in my house?

Find the construction company and obtain their foundation pit monitoring and third-party inspection data to substantiate the causality; if no agreement can be reached, initiate a lawsuit for compensation for property damage.

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

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

Disclaimer: This article is compiled based on the current effective laws and regulations and public 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.