A renovation can look minor on a contractor’s drawing but still affect a load-bearing wall, fire safety route, façade element, or regulated use of space. That is where the question, what is a qualified person, becomes commercially significant. In Singapore, a Qualified Person, commonly called a QP, is the registered professional appointed to take responsibility for specific building works and submissions under the applicable regulatory framework.
For owners, developers, MCSTs, and contractors, a QP is not simply a signature provider. The QP evaluates whether the proposed works can be designed, documented, submitted, and carried out in a manner that meets statutory requirements. Appointing the right professional early can prevent redesign, rejected submissions, site delays, and costly corrective work.
What Is a Qualified Person in Singapore?
Under Singapore’s building control framework, a Qualified Person is generally a registered architect or a professional engineer who is qualified and appointed for the relevant scope of work. The appropriate QP depends on the nature of the project, the discipline involved, and the authority requirements.
An architect may act as QP for architectural works such as additions and alterations, change-of-use planning, building layout, accessibility provisions, and other architectural submissions. A Professional Engineer, or PE, may act as QP for engineering works within the engineer’s discipline. For structural matters, this commonly means a PE in civil or structural engineering who can assess loading, stability, framing, foundations, demolition sequencing, and the impact of alterations on an existing building.
The term is often used broadly in project conversations, but it has a specific regulatory meaning. A contractor, interior designer, draftsman, or project manager may be highly capable in their own role, yet they do not automatically become the QP merely because they prepared drawings or coordinate the site. The QP has defined professional duties and accountability for the work accepted under their appointment.
When Is a QP Required for Building Works?
Whether a QP is required depends on the proposed scope, location, building type, and whether the works are exempt from formal approval. It is not safe to assume that work is exempt because it is small, internal, or commonly seen in neighboring units.
QP involvement is frequently needed where works affect structural elements, building envelopes, fire safety provisions, regulated building systems, or approved plans. Typical examples include removing or creating openings in walls, installing mezzanines, constructing new staircases, adding roof structures, changing the use of premises, building extensions, carrying out major landed-house alterations, and modifying commercial or industrial spaces.
For a condominium, office, retail unit, factory, or warehouse, there may also be separate landlord, MCST, JTC, or building management requirements. These requirements can sit alongside submissions to agencies such as BCA, URA, SCDF, PUB, LTA, NEA, or NParks. A QP helps identify the approval pathway, but each agency has its own scope, technical standards, and review process.
Some renovation works may not require a formal authority submission. Even then, an owner should consider a professional assessment if the work involves a wall that may be structural, unusually heavy equipment, a raised platform, a trellis, alterations near services, or signs of existing deterioration. A short investigation before construction is usually more economical than stopping work after a problem appears.
The QP’s Role From Design to Completion
A QP’s work begins with defining the actual project scope. This may involve reviewing available approved plans, conducting a site inspection, examining the existing structural arrangement, and identifying restrictions that are not obvious from an interior layout. On an older building, records may be incomplete or site conditions may differ from past drawings. In these cases, further measurement, scanning, opening-up works, or targeted investigation may be necessary before a safe proposal can be finalized.
The QP then develops or coordinates the technical design and submission documents. Depending on the project, this can include architectural plans, structural calculations, engineering drawings, method statements, specifications, and supporting declarations. The goal is not merely to produce drawings that look complete. The documents must communicate a buildable solution and demonstrate compliance to the reviewing authority.
During construction, the level of involvement depends on the approved scope and statutory obligations. The QP may carry out inspections, respond to site queries, review proposed deviations, coordinate with other consultants, and confirm that critical work is completed in accordance with the approved design. Contractors remain responsible for workmanship, sequencing, labor, and site execution. However, a contractor should not change structural details, materials, dimensions, or approved layouts without referring the issue back to the QP.
At the close of works, further inspection, records, declarations, or completion documentation may be required. This is why a QP appointment should be treated as a project role, not a one-time approval exercise.
QP, PE, Architect, and Contractor: Know the Difference
These roles overlap in practice, but they are not interchangeable. Understanding the distinction helps clients appoint the right team and avoid gaps in responsibility.
A QP is the registered architect or professional engineer appointed for the applicable regulated works. A PE is a professional engineer registered in a particular discipline and may act as the QP when the work falls within that discipline and appointment. An architect may be the QP for architectural components and can coordinate the wider design and submission process.
A contractor constructs the works and manages site operations. The contractor may propose practical construction methods, identify access constraints, and provide shop drawings or fabrication details. Those inputs are valuable, but they do not replace the QP’s design responsibility or statutory role. Similarly, an interior designer can establish the functional and visual intent of a space, but structural, fire safety, and approval issues still require the appropriate qualified professional.
More complex projects may need several specialists. For example, a commercial fit-out could require an architect for layout and regulatory coordination, a structural PE for new openings or heavy equipment supports, and mechanical and electrical engineers for ventilation, power, and fire-related systems. The right setup depends on the risk and scope, not on a fixed checklist.
Choosing the Right Qualified Person
The best QP for a project is not necessarily the one offering the fastest signature or the lowest initial fee. A low upfront fee can become expensive if the consultant has not allowed for investigation, coordination, revisions, or site support. Owners should first ensure the professional is properly registered and has relevant experience with the building type and proposed work.
Ask whether the QP has handled similar submissions, such as mezzanines in industrial units, structural alterations in condominiums, landed property additions, façade inspections, or change-of-use applications. The practical experience matters because each type of work creates different design, documentation, and authority-review issues.
It is also useful to confirm the scope of appointment in writing. The proposal should make clear whether it includes site inspection, architectural and structural design, authority submissions, responses to comments, construction-stage inspections, coordination with other agencies, and completion documentation. If investigative works, specialist testing, or separate submissions may be needed, these should be identified early rather than treated as unexpected extras later.
A coordinated consultancy can reduce the handoffs between design, engineering, and regulatory work. For projects that require several disciplines, Stellar Structures can coordinate architectural, structural, and compliance inputs around a single practical approval and construction strategy.
Common Mistakes That Create Approval and Site Problems
One common mistake is engaging a QP after the contractor has already demolished a wall, ordered steel, or started fabrication. At that stage, the QP may find that the proposal needs a different structural detail, additional fire safety measures, or a revised layout. Early consultation gives the design team room to solve issues before they become site variations.
Another mistake is relying on verbal assurances that a wall is non-structural or that an existing platform can carry additional loading. Buildings behave as systems. A wall may provide lateral restraint, a slab may have limited reserve capacity, and added equipment may introduce vibration or concentrated loads that were not part of the original design.
Clients also sometimes treat authority approval as the only milestone. Approval is essential, but the approved design must still be followed on site. Material substitutions, shifted openings, revised beam sizes, or altered stair geometry can all require review. Clear communication between the owner, contractor, and QP is the simplest way to keep the project controlled.
Start With the Real Scope of Work
A Qualified Person brings professional responsibility, but also practical value: clearer design decisions, a more defensible approval path, and fewer late-stage surprises. Before signing a lease, committing to a renovation package, or instructing demolition, establish what the building work actually involves and whether a QP is required. That early check gives the entire project a safer, more realistic foundation.