A PE endorsement is not a document-stamping exercise. For structural, geotechnical, temporary works, or building alteration projects in Singapore, the Professional Engineer must be able to verify that the design basis, site conditions, drawings, calculations, and construction interfaces support a safe and code-compliant outcome. This best PE endorsement checklist helps project teams prepare the right information before requesting professional sign-off.

The checklist applies most directly to property owners, architects, contractors, and fit-out teams managing new works, renovations, additions and alterations, structural repairs, excavations, or temporary installations. The exact scope depends on the project and the relevant authority requirements, but the preparation standard should remain consistent: provide a complete, coordinated, and buildable technical package.

Start With the Actual Endorsement Scope

The first question is not whether a PE is required. It is what the PE is being asked to take professional responsibility for. A request for endorsement should clearly identify the discipline, work elements, site location, intended use, and submission objective.

For example, a retail fit-out may involve a structural check for new suspended loads, a review of hacking works, and mechanical and electrical coordination. A landed house addition may require structural design, foundation considerations, architectural management, and authority submissions. An excavation or lifting platform may require temporary works design and site-specific construction sequencing.

Define whether the scope involves structural engineering, geotechnical engineering, mechanical and electrical systems, fire safety interfaces, architectural coordination, or a combination of disciplines. A PE should not be asked to endorse work that sits outside the agreed scope or relies on unresolved inputs from another consultant.

Before design review begins, confirm the following:

• The project address, lot information, existing building use, and proposed scope of work
• The relevant authority pathway, including whether submissions or clearances are required
• The party responsible for each design package, including architectural, structural, M&E, fire safety, and specialist works
• The required endorsement deliverable, such as calculations, drawings, inspection certification, method statement review, or submission forms
• The intended construction dates and any critical approval or possession deadlines

This step prevents a common problem: a technically sound calculation package that does not correspond with the contractor’s latest drawings or the works actually planned on site.

Best PE Endorsement Checklist: Existing Conditions

Most endorsement delays originate from incomplete information about the existing structure or ground conditions. This is particularly relevant for renovation and A&A works, where original approved drawings may be missing, outdated, or inconsistent with previous alterations.

Provide all available architectural, structural, and M&E drawings, including approved plans where available. Identify the revision status of every document. If the building has undergone previous works, include records of those modifications, inspection reports, and any known structural defects, water ingress, settlement, cracking, or unauthorized alterations.

A site inspection may be necessary when drawings alone cannot establish the existing load path, member sizes, material condition, foundation arrangement, or feasibility of the proposed work. Concealed reinforcement, slab thickness, beam depth, and connections cannot be assumed simply because a typical detail exists on an old plan.

For projects involving excavation, retaining structures, basements, slopes, or foundations, include available soil investigation data, adjacent building information, utility records, and site constraints. If adequate geotechnical data does not exist, further investigation may be required before a PE can finalize the design.

The practical standard is simple: the proposed design must be based on verified conditions, not assumptions that shift construction risk to the site team.

Confirm the Design Basis Before Calculations Begin

A calculation is only as reliable as its design inputs. The design basis should state the applicable codes, design loads, material specifications, structural system, construction method, and key assumptions. It should also explain how new works interact with the existing building.

For structural works, confirm imposed loads, dead loads, equipment loads, façade loads, storage loads, and any concentrated loads from plant, safes, tanks, raised floors, signage, or suspended installations. A change in use can be material. An office area converted into high-density storage, a rooftop fitted with mechanical equipment, or a commercial unit receiving a new mezzanine may require a different loading assessment.

For temporary works, the construction sequence is part of the design. The PE may need to consider propping, shoring, access restrictions, demolition stages, lifting operations, excavation levels, surcharge loads, and protection of neighboring structures. A permanent-work drawing does not automatically address the risks created while that work is being built.

Where specialist systems are involved, obtain current manufacturer data and design reactions. This can include steelwork connections, façade support brackets, racking, access platforms, solar installations, mechanical equipment supports, or proprietary retaining systems. Generic catalog information is not a substitute for project-specific loading and connection details.

Coordinate Drawings, Calculations, and Site Method Statements

Endorsement packages should be coordinated before they reach the PE. The drawings must match the calculations, and both must match the intended site method.

A frequent mismatch occurs when a structural calculation assumes a particular support condition, while the architectural drawing shows a different wall layout or opening size. Another occurs when a contractor submits a method statement for hacking or demolition without identifying the structural elements affected. These gaps create review comments, redesign, or unsafe site decisions.

Review the package for consistency across the following areas:

• Grid lines, levels, dimensions, member sizes, and locations of openings
• Load paths from new loads through slabs, beams, columns, walls, and foundations
• Details for connections, anchors, base plates, reinforcement, welds, bolts, and interfaces with existing work
• Construction sequence, temporary supports, access provisions, and removal or demolition methodology
• Coordination with M&E penetrations, fire-rated elements, waterproofing, façade components, and architectural finishes

If the project requires a method statement, make it specific to the site. It should identify hazards, sequence of works, temporary stability measures, inspection hold points, plant requirements, and responsible parties. A generic method statement may describe the activity, but it rarely demonstrates that the activity is safe for a particular building condition.

Prepare for Regulatory and Submission Requirements

PE endorsement often supports a wider approval process. Depending on the works, this may involve submissions or coordination with BCA, SCDF, URA, JTC, LTA, PUB, NEA, or NParks. The authority interface should be identified early because submission requirements can affect the design, documentation format, and project schedule.

Confirm the correct project description, owner details, site particulars, and appointment information. Ensure that drawings carry clear titles, revision numbers, scales, and professional references where required. Incomplete forms, inconsistent project names, or drawings issued without revision control can delay a submission even when the engineering design is acceptable.

Authority requirements vary by work type and location. A minor internal alteration may need a different pathway from works affecting structural members, fire safety provisions, drainage, road reserves, trees, or utilities. Do not assume that approval for one discipline covers another. A coordinated review is particularly valuable where architectural changes affect structural, M&E, and fire safety obligations at the same time.

Keep Inspection and Construction Records in the Scope

An endorsement at design stage does not remove the need for proper execution, inspection, and record keeping. The PE’s role during construction depends on the agreed scope and statutory requirements, but project teams should plan for inspections before work is concealed.

Identify inspection points for reinforcement, steel connections, anchor installation, excavation support, temporary works, waterproofing interfaces, or remedial works. Notify the relevant consultant early enough to allow inspection before concrete is poured, finishes are installed, or access is removed.

Maintain records of approved drawings, site photographs, material certificates, test reports, requests for information, inspection observations, and approved changes. If conditions differ from the endorsed design, stop treating the original package as automatically valid. The change should be assessed before work proceeds.

This is especially relevant when contractors substitute materials, relocate openings, increase equipment loads, revise support details, or encounter unforeseen site conditions. A quick site adjustment can alter structural behavior or create a compliance issue that is expensive to correct after completion.

Know When the Checklist Is Not Enough

A checklist improves readiness, but it cannot replace professional judgment. Projects with visible distress, substantial demolition, deep excavation, complex temporary works, changes of use, or uncertain existing conditions need an early technical assessment rather than a late-stage request for endorsement.

The fastest route to approval is usually not the shortest initial brief. It is a properly defined scope, verified site information, coordinated design package, and timely inspection plan. AEC Technical Advisory can support this process across engineering design, PE and QP endorsements, inspections, and authority submissions so project decisions are made before they become site delays.