A defect at handover is rarely a purely technical issue. It quickly becomes a question about the scope of work, timeline for rectification, costs, and evidence. Who is responsible for construction defects? Most often, the contractor who carried out the faulty work. In practice, however, determining responsibility requires distinguishing the roles of process participants, checking documentation, and providing a clear description of the defect itself.
An error in location, an unclear photo, or a vague instruction "to be corrected" is enough for the contractor to challenge the report or fix something other than what was needed. That's why responsibility is worth establishing from the moment of reporting, not only during a dispute after handover.
Who is responsible for construction defects: the basic principle
As a rule, the entity that performed a given work element is responsible for defects in its execution. If a subcontractor laid tiles poorly, installed joinery inconsistently with the design, or left an installation leak unsealed, they should correct the non-compliance in coordination with the general contractor. The investor typically directs their claims to the party they contracted with—usually the general contractor.
This distinction has operational significance. An investor should not waste time determining which crew was on site three months earlier if they have a contract with the general contractor. The general contractor is responsible to the investor for proper execution of the entrusted work and subsequently settles responsibility with the subcontractor according to their own contracts.
Not every defect results from a contractor's error. The cause may be faulty design documentation, improper material supplied by the investor, a clash between trades, or a decision made during execution without updating the design. Therefore, before assigning a task, it's worth establishing: what is non-compliant, with what requirement, and who influenced the problem's occurrence.
Responsibility of construction process participants
Contractor and subcontractor
The contractor is responsible for the quality and compliance of work with the contract, design, technical specification, technical knowledge standards, and agreements made on site. This applies to both visible finishing defects and installation faults or errors revealed in tests and inspections.
The subcontractor is usually directly responsible for a specific scope of work: installations, facades, plaster, floors, or joinery. To handle defects efficiently, the report should be assigned to that company or crew, but this does not relieve the general contractor of process control if they are the party to the investor's contract.
General contractor
The general contractor is the center of organizational responsibility on the project. They coordinate trades, inspect subcontractors' work, ensure correction deadlines are met, and report the defect closure status to the investor. Even when the cause lies with a specific company, lack of effective coordination may delay the handover of an entire apartment, floor, or building.
In practice, the general contractor needs one register that shows the task owner, deadline, status, and communication history. Without this, a report easily disappears between a call to the site manager, a message sent via instant messenger, and another version of an Excel spreadsheet.
Investor, developer, and client
The investor specifies the required result in the contract, documentation, and handover standard. They have the right to report defects, demand their removal according to contract conditions, and receive work with reservations. However, they should not independently point to a culprit based solely on visual assessment, especially when the defect affects multiple trades.
The developer, when handing over the unit to the buyer, is responsible for the process of addressing reported defects within the sales relationship. At the building level, they may later direct tasks to the general contractor and subcontractors. What is key is maintaining the full path: from the client's report, through technical verification, to confirmation of the repair.
Designer and investor's supervisor
The designer may be liable when a defect results from a design error, an ambiguous detail, or a solution impossible to execute properly under given conditions. In such a case, the contractor should not improvise. They should report the problem, obtain clarification or a change, and retain confirmation of the arrangements.
The investor's supervisory inspector controls the quality and compliance of work with documentation and regulations within the scope of their assigned duties. They do not perform work for the contractor and do not automatically assume their responsibility for a defect. However, their role is important in assessing whether a defect exists, what corrective actions are appropriate, and whether it can be considered eliminated.
Site manager and work managers
The site manager is responsible for conducting the construction according to regulations, design, and safety principles, within the scope of their statutory function. Work managers are responsible for organizing and overseeing their assigned trades. Their involvement in the reporting process is necessary because they can verify repair technology, work area availability, and the impact of corrections on other elements.
However, their technical function should not be confused with an automatic financial obligation to correct every defect. Who bears the costs is determined primarily by the cause of the defect and contractual provisions.
How to determine responsibility without unnecessary disputes
The most useful report does not sound like "wall to be corrected." It should indicate a specific location, a description of non-compliance, reference to a requirement, and supporting material. For example: "Unit B-214, bathroom, wall at the vertical line—surface deviation exceeding the handover requirement; photos and measurements attached." Such a record allows the matter to be directed to the right person and assessment of whether the problem concerns execution, material, or design.
For more complex defects, it helps to separate two questions. First: who should fix the problem now to avoid blocking handover? Second: who will ultimately bear the cost? From the investor's perspective, the first question often points to the general contractor. The second may require analyzing contracts, protocols, correspondence, design documentation, and technical opinions.
It is also worth distinguishing a defect from damage that occurred after work completion. A crack in a window may result from faulty installation, but it may also have been caused by another crew. Decisive factors are often the dates of inter-trade handovers, photos of the previous condition, and the history of access to the room.
Documentation that helps close a defect
Good documentation does not only serve to pursue claims. First and foremost, it shortens the path from defect discovery to verified repair. Each report should have an owner, a location on the floor plan, a description, photos, priority, deadline, and status. After repair, a photo or entry confirming execution is needed, followed by verification by the person accepting it.
In a system like FixControl, you can mark a point precisely on the object plan, assign it to a contractor, and maintain a change history. The contractor updates the status in the app or receives a precise PDF or Excel report if they work in a traditional workflow. This limits discussions about which room the report concerns and whether the correction has already been verified.
During partial handover, it is especially important to distinguish statuses: reported, under repair, completed for verification, accepted, or rejected. A mere message "done" does not close the matter. Closure should occur only after confirming that the defect has been eliminated according to the requirement, not merely concealed.
What the contract and defect discovery stage change
Responsibility for construction defects must always be read together with the contract. The agreement may specify the reporting procedure, response times, handover rules, penalties, warranty, and documentation management. After handover, provisions regarding liability and warranty also matter, though their application depends on the type of relationship and specific circumstances.
A defect discovered before handover usually provides the greatest opportunity for control. You can stop handover of a given scope, set a correction deadline, and verify the result on-site. After transferring the building, you can still pursue defect elimination, but determining the cause often becomes more difficult, especially if the unit or building was already in use or other crews worked in it.
That's why on a construction site, it's worth acting simply: indicate the defect precisely, assign it to the right participant, set a deadline, and document each stage. Such organization will not replace contractual provisions or technical assessment, but it gives the team what it needs most during handovers: clear responsibility and confirmation that the problem was actually eliminated.