[Direct answer]In the Beijing area, the construction of adjacent real estate shall not interfere with the ventilation, lighting, and sun exposure of neighboring buildings (Article 293 of the Civil Code of the People's Republic of China). If a neighbor's construction blocks the sunlight, the affected party may demand the cessation of infringement, removal of obstacles, and compensation for losses. The legal remedies are as follows: negotiation with the property management company; administrative complaints (reporting the illegal construction to the urban management and planning departments); and civil litigation (claiming removal of obstacles and compensation for losses). The key to winning the case lies in the evidence: the facts, extent, and causality of the damage to sunlight, and if necessary, applying for a sunlight assessment.

1. Problem background and typical scenarios

The neighbor built two floors of color-steel houses outside the south wall of their house, making the living room as dark at noon as it is in the evening; the upstairs neighbor added a sunroom, turning the downstairs lighting windows into a courtyard floor; and the big trees planted in the yard and the makeshift sheds overlapped each other to block the light. Lighting disputes are common in self-built houses, old residential areas, and villa districts. The most common question from the parties involved is "Does the law regulate this?" —— Yes, it does, and the rules are clear.

II. Key points of contention

First, the legal standards and judgments regarding obstruction of lighting. Second, the identification of illegal buildings and the administrative process for dealing with them. Third, appraisals in litigation and the calculation of compensation. Fourth, the handling of other obstructions such as trees and scaffolding.

III. Professional analysis by Henglue Lawyers

The first layer, legal standards and judgment frameworks: Article 293 of the Civil Code establishes protection of ventilation, lighting, and sunlight in neighboring relationships. To determine whether the obstruction is illegal, two factors are considered—whether the building itself meets engineering construction standards (planning spacing and sunlight standards) and whether the interference exceeds the general tolerance limit of society. There are national standards and local regulations for sunlight standards in urban and rural residences (requirements for sunlight hours on the Dahan Festival or Winter Solstice). New buildings approved through planning and unlicensed color steel sheds are evaluated completely differently—existing obstructions caused by legal buildings fall within the scope of planning tolerance, while illegal obstructions face administrative and civil litigation. The second layer, the value of prioritizing administrative pathways: For buildings without planning permits, complaints are filed with planning departments and urban management authorities, and illegally constructed buildings are subject to demolition or confiscation within a specified timeframe. This administrative pathway is the least costly and most effective, as demolishing illegal buildings restores natural lighting. Applicants must submit building photos, construction records, and comparative measurements of planning spacing. At the same time, the housing and urban-rural development department verifies whether the building has approval procedures, with "no procedures" often serving as a key vulnerability. The third layer, civil litigation and appraisals: After failed negotiations and administrative procedures, a lawsuit for removal of obstructions is initiated—claiming demolition of or reduction in the obstructing building and compensation for losses. Key evidence includes sunlight analysis appraisals (commissioning professional institutions to compare sunlight hours before and after obstruction, with the appraisal directly determining the outcome of the judgment), records of lighting-related impacts (increased lighting costs, indoor humidity, and health effects), and assessments of housing value losses (claiming damages for sunlight degradation affecting property values). The statute of limitations for litigation is three years from the date of becoming aware of the obstruction, and the right to remove obstructions itself is not subject to time limits. The fourth layer, handling other forms of obstruction: Tree obstruction—if a neighbor's tree branches extend beyond the property line, pruning can be requested (based on the Civil Code's provisions on neighboring relations and Article 1165). Root invasion can also be addressed through removal requests. For facilities such as sheds, billboards, and solar energy equipment, they are treated as neighboring interference, with prior negotiation and litigation required. Where property management fails to fulfill its duties and tolerates illegal construction, the property management's liability is also reviewed. Prevention measures: Before purchasing property, conduct on-site inspections of lighting and surrounding planning spaces (as planning spaces may be converted into buildings). When detecting neighboring construction activities, immediately verify their approval procedures—public disclosure of approval documents serves as an information window.

IV. Practical suggestions and legal basis

The first step is to take and record comparative images of indoor lighting at different times after the occurrence of the obstruction. The second step is to verify the planning and approval status of the covered buildings, and report illegal construction to the urban management and planning departments. The third step is to consult with the administration without success, then commission a sunlight evaluation and file a lawsuit to remove the obstruction. The fourth step is to attach electricity bills, repair costs, and evaluation evidence to support the claim for damages. Main legal basis: Article 293, Article 179, and Article 1165 of the Civil Code of the People's Republic of China; the provisions of the Urban and Rural Planning Law of the People's Republic of China regarding construction permits and the handling of illegal construction; specific applications shall be subject to the currently effective regulations.

5. Henglu Law Firm's Reminder

Three tips for protecting lighting rights: There are laws to regulate adjacent lighting, and you should first investigate whether the neighbor's structure is an unauthorized building before filing a lawsuit; daylighting appraisal is a crucial factor in litigation, so it's important to save the comparison images of the lighting situation before and after the obstruction; and reporting unauthorized construction has the lowest cost, as you can pursue the case through both administrative and civil channels. For disputes involving adjacent rights, you can seek legal assistance through the following channels:Real estate transactions and construction projectsThe service provides a comprehensive solution, which can be combined with the investigation of illegal construction and planning disputesLand expropriation and demolition, and administrative litigationFor reference, you can refer to the disputes over house value assessments involving platesBusiness and contract disputes in enterprisesFor those interested in the overall arrangement of family real estate, you can pay attention to this columnDivorce litigation and family disputesFor specific cases requiring customized solutions, please feel free to consult us.Special services.

VI. Frequently Asked Questions

Q1: The neighbor's building has a planning permit, but it still blocks the sunlight. What should I do?

Legally approved buildings are usually within the planning spacing and sunlight standards, and the obstruction is within the tolerable range. If there are suspicions of approval violations (fraudulent spacing, overbuilding), you can apply for government information disclosure verification and file a planning objection as a stakeholder.

Q2: Who will bear the cost of the sun exposure assessment?

Pay in advance, and the losing party will bear the cost after the case is won; before the appraisal, you can first entrust a professional institution to conduct a preliminary sunshine measurement and evaluation of the chances of winning to avoid wasting a large amount of appraisal fees.

Q3: Can we just demand compensation instead of demolishing the house?

It can be negotiated; in litigation, the court will determine the degree of obstruction and the reasonableness of the demolition based on the circumstances—illegal buildings that cause obstruction are usually ordered to be demolished or rectified, while existing obstructions caused by legal buildings are mainly compensated for or remedied.

Q4: What should I do if the big tree planted by my neighbor blocks the sunlight?

You can request to prune branches that are obstructing your view. If the tree belongs to a neighbor and its planting is legal, the pruning should be limited to what is acceptable to the neighbor and reasonable, and you cannot demand that the entire tree be cut down. Wild trees or trees planted in violation of regulations are a different matter.

Q5: Can I claim compensation if the price of the house drops due to obstruction?

It can be used as a claim for damages — entrust an appraisal agency to issue an opinion on the difference in market value before and after the obstruction, and claim it together with the actual expenses such as repair and lighting. The court will make a comprehensive judgment on the claim.

This article is written based on the common judicial interpretations in the Beijing area. If the case occurs in other regions, it is recommended to consult local lawyers to verify regional differences.

If you are currently facing similar problems, it is recommended that you consult a professional lawyer as soon as possible with the relevant evidence, 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 laws and regulations and publicly available adjudication rules. It is for general reference only and does not constitute formal legal advice on specific cases. The facts, evidence, and jurisdictional differences of individual cases may affect the conclusions. If you encounter disputes, please consult a practicing lawyer in time.