A PE endorsement in Singapore is a plan, calculation, report or certificate signed by a Professional Engineer who is on the Professional Engineers Board register and holds a practising certificate in force for that branch of engineering. Structural plans for building works must come from such a PE, and a document signed by anyone else is invalid under the Professional Engineers Act 1991.
Everything below is taken from the Professional Engineers Act, the Building Control Act and its regulations on Singapore Statutes Online, and from the PEB, BCA and SCDF pages linked at each point. We read all of them on 9 October 2026. Rules change, and the statutes are amended often, so treat this page as correct at that date and let your PE or QP confirm anything your project depends on. Where an official source does not publish something, such as what a PE charges, we say so rather than repeat a figure from a forum.
What PE endorsement means
"PE endorsement" is industry shorthand, not a term the statutes define. What the law sets out is who may do and sign engineering work. Section 15 of the Professional Engineers Act 1991 has three rules that together make up what people mean by an endorsement:
- Who may do the work. A person must not engage in a prescribed branch of professional engineering work, or draw or prepare any plan, drawing, design or specification for it, unless they are a registered PE with a practising certificate in force for that branch, or are working under the direction or supervision of one (s.15(1)).
- Who may sign and submit. Only a registered PE with a practising certificate in force may sign and submit to a building authority or public authority any plan, design or specification in a prescribed branch, or any report or certificate that written law requires a professional engineer to sign. Any document signed in contravention "is invalid" (s.15(3)).
- Who may use the title. Only a registered PE may call themselves a "professional engineer", or use "Er." or "Engr." before their name (s.15(4)).
The prescribed branches are listed in section 2 of the Act: chemical, civil, electrical and mechanical engineering, plus any others that may be prescribed. The Act defines professional engineering work broadly, to include consultation, investigation, evaluation, planning, design or responsible supervision of construction in connection with buildings, works or projects where the safeguarding of life, public health or property is involved.
Registration and the practising certificate are two separate things. Registration puts an engineer on the register of professional engineers. The practising certificate, under section 28, is an annual certificate that authorises the PE to engage in professional engineering work in Singapore during that year, within the branch of engineering in which the register shows they are qualified. A PE who wants to practise next year applies by 1 December. So a PE number on an old drawing proves registration at some point, not that the engineer can endorse your plans today.
How to check a Professional Engineer on the PEB register
The Professional Engineers Board keeps the registers. Section 13 of the Act requires it to maintain a register of professional engineers, a register of specialist professional engineers, an annual register of practitioners and a register of licensed practices, with the branch or branches each PE is qualified to practise shown against their name. The public side of this is PEB's Find a Professional Engineer page, which links to these lists:
| PEB list | Use it to |
|---|---|
| Directory of Professional Engineers with Practicing Certificate | Confirm an engineer holds an active practising certificate. Each row shows registration number, full name, branch (civil, electrical, mechanical or chemical), registration date, employer and contact number. |
| Directory of Specialist Professional Engineers with Practising Certificates | Find specialist PEs, such as geotechnical engineers, who must be appointed for geotechnical building works. |
| Directory of Licensed Corporations and Partnerships | Check that the firm, not only the engineer, is licensed to supply professional engineering services. |
| Directory of Registered Foreign Professional Engineers | Check a foreign engineer the Board has authorised to work in collaboration with a Singapore PE. |
| List of Suspended & Recently Deregistered PE | Rule out an engineer whose registration has been suspended or removed. |
Two practical points. First, match the branch to the work: a PE registered in mechanical engineering cannot endorse structural plans, because the practising certificate is limited to the branch on the register. Second, check the firm as well as the person. Section 15(8) of the Act says professional engineering services may be supplied only by a licensed practice, or by a PE with a practising certificate on their own account, as an employee or director of a licensed practice, or in a partnership made up wholly of PEs.
When a PE endorsement is needed
Most searches for "PE endorsement" come from building works, and that is where the Building Control Act 1989 and the Building Control Regulations 2003 decide the answer. The table below gathers the situations the sources name. It is not the complete list of everything a PE signs in Singapore.
| Situation | Who signs | Source |
|---|---|---|
| Structural plans and calculations for building works needing BCA approval | A QP who is a PE in the civil or structural discipline | BCA structural plans page; Third Schedule, Building Control Regulations |
| A&A works where structural stability is not affected | Plans endorsed by a PE with a specified certificate | BCA structural plans page |
| Repairs, alterations or additions the QP suspects may affect structural stability | A PE in the appropriate discipline certifies the building has been inspected and whether it can resist the altered forces | Regulation 5, Building Control Regulations |
| Site investigation reports with a structural submission | Endorsed by a PE | BCA structural plans page |
| Geotechnical building works | A QP who is a geotechnical engineer (a specialist PE) prepares and supervises the geotechnical aspects | Building Control Act s.8(1)(d) |
| Lightning protection system plans | A PE registered in electrical engineering | Third Schedule, Building Control Regulations |
| Periodic Structural Inspection | A structural engineer: a PE in the civil or structural discipline | Building Control Act s.26; BCA PSI page |
| Periodic Facade Inspection | A competent person: a QP (architect or PE) who meets BCA's prescribed requirements | Building Control Act s.26; BCA PFI page |
| Fire safety works needing SCDF plan approval | A QP with the discipline relevant to the work | SCDF plans submission page |
Structural plans. BCA's structural plans and permit approvals page is direct: only a QP who is a registered PE in the civil or structural discipline can apply for structural plan approval. The submission includes detailed structural plans signed by the QP with a certificate on the first and last sheets, structural calculations with a certificate on the first and last pages of each book, and a copy of the URA planning permission, lodgement receipt or no-objection letter. After plan approval a permit is needed before structural works start, applied for jointly by the developer, the QP and the builder. BCA gives 7 working days to process an application without an accredited checker's certificate, 10 working days for a first submission with one, and 20 working days at the CORENET X Construction Gateway. Which projects must go through CORENET X was narrowed by the BCA and URA circular of 23 July 2026 to projects with GFA of 5,000m² and above, even though some older BCA pages still say "all new projects"; our CORENET X guide covers the current scope and the gateway process.
A&A on an existing building. This is where endorsements most often catch owners out. Regulation 5 of the Building Control Regulations says that where works consist of repairs, alterations or additions to an existing building, and the QP who prepared the building plans has reasonable grounds to suspect they may affect the structural stability or integrity of the building, the plans must be accompanied by a PE's certification that the PE has inspected the building, investigated its overall structure, and considers it capable or incapable of resisting the forces and moments the works will increase or alter. If the QP is already a PE in the appropriate discipline, the QP may certify. The full approval sequence for alterations is in our A&A works guide.
Inspections. The Periodic Structural Inspection is carried out by a structural engineer appointed by the building owner, or by the MCST for a strata development, once every 10 years for residential buildings and once every 5 years for others. Detached, semi-detached, terraced and linked houses used only as homes are excluded. The Periodic Facade Inspection applies to buildings over 20 years old, every seven years, with exceptions, and is carried out by a competent person the owner appoints. Our guides to Periodic Structural Inspection and Periodic Facade Inspection go into the detail.
Fire safety and M&E. SCDF's plans submission process page says anyone carrying out fire safety works must first obtain approval of plans from SCDF, and that plans must be prepared and submitted by a QP on behalf of the owner or occupier, with "QPs with the discipline relevant to the kind of work involved" qualified to make the submission. Works under the Fire Safety (Exemption) Order need no plan submission, and certain minor alterations or additions may proceed after an MAA lodgement instead. Where an alternative solution is proposed, a fire safety engineer prepares it and a separate peer reviewer assesses it.
Works that do not need a PE: insignificant building works
Section 4(1)(d) of the Building Control Act takes insignificant building works out of the plan approval regime, and regulation 3A points to the First Schedule of the Building Control Regulations for the list. BCA's page on building works not requiring approval describes them simply as building works that do not require plan submission to BCA. The Professional Engineers Act matches this: section 19 says nothing in it stops an unregistered person carrying out construction or repairs where no written law requires plans to be submitted to a building authority.
A selection of items from the First Schedule, as in force on 9 October 2026:
- Creating an opening in a non-load-bearing wall, or sealing up a wall opening.
- Demolishing, restoring or reinstating a non-load-bearing wall.
- A boundary wall, boundary fence or gate that is not load bearing.
- Enclosing the sides of a balcony, yard or terrace with windows and glass panels in a residential building.
- An awning, windowhood or cantilevered roof of lightweight material, or glass no thicker than 13mm, with a horizontal projection of no more than 3,000mm.
- A loft with only timber flooring and an area of no more than 5 square metres, and removing a timber or steel loft.
- Replacing or reinstating a railing or balustrade with the same material, design and fixing details, unless it is non-laminated glass.
- A trellis, and a single storey shelter of no more than 10 square metres without safety barriers.
The full list has conditions on most items, and the schedule was widened from 1 April 2025, so read the current text rather than a summary. Two cautions apply. "Non-load-bearing" is a structural judgement, and which walls carry load is exactly the question a PE answers. And an exemption from BCA is not an exemption from everyone: BCA reminds owners that safety, good practice and approvals from other authorities, MCST by-laws and caveats still apply, and advises engaging a QP to advise on the clearances when in doubt. HDB flats have their own regime, covered in our HDB renovation permit guide.
QP, PE and accredited checker: who does what
These roles are often confused, because one engineer can hold more than one of them. The table sets out who qualifies for each and what each one does.
| Role | Who qualifies | What they do |
|---|---|---|
| Professional Engineer (PE) | Registered with PEB, with a practising certificate in force for the relevant branch | Engineering work and the signing of engineering documents in that branch |
| Qualified Person (QP) | A registered architect or a registered PE, either with a practising certificate in force | Appointed by the developer to prepare the plans, and to supervise the works; the two may be different people |
| Accredited checker (AC) | Registered by the Commissioner of Building Control on prescribed qualifications and experience | Independently checks the detailed structural plans and design calculations of major building works |
| Structural engineer (for PSI) | A PE in the civil or structural discipline with a practising certificate | Carries out the Periodic Structural Inspection and submits the report to BCA |
QP. Section 2 of the Building Control Act defines a qualified person as a registered architect or a registered professional engineer, in each case with a practising certificate in force. Section 8(1) requires the developer of building works to appoint an appropriate QP to prepare the plans, an appropriate QP to supervise the works, and a licensed builder. Which QP is appropriate is set by the Third Schedule to the Building Control Regulations:
- Part I projects, such as bridges and tunnels, retaining walls, site formation, foundations and plinths, claddings and curtain walls, chimneys and concrete tanks: a professional engineer.
- Part II projects, which include alterations, additions and extensions to detached, semi-detached and terraced houses, alterations and additions within existing buildings that do not affect the building envelope, industrial buildings and warehouses: a professional engineer or an architect.
- Everything else: an architect.
- In every case, structural plans must be prepared by a professional engineer, and lightning protection plans by a PE registered in electrical engineering.
Accredited checker. Section 8(1)(e) of the Act requires the developer of major building works to appoint an accredited checker for the detailed structural plans and design calculations, and one from an accredited checking organisation where the value of the works exceeds the limit prescribed in the regulations. Major works are everything not listed in the Fourth Schedule to the Building Control Regulations, whose minor works include houses of up to 3 storeys, shophouses of up to 3 storeys, retaining walls with a visible height of up to 4 metres, demolition, and structural repairs, alterations and additions that do not materially affect the key structural elements of an existing building. BCA's structural page adds that A&A works which do materially affect key structural elements, such as strengthening works, need an AC certificate. Under section 18 the AC must not certify plans in which they have any professional or financial interest, and an accredited checking organisation must be a partnership of PEs or a practice licensed under the Professional Engineers Act.
PE disciplines
The Professional Engineers Act lists four prescribed branches: chemical, civil, electrical and mechanical engineering. PEB's practising certificate directory shows the branch against each engineer. On top of the branch, the Act allows registration as a specialist professional engineer under section 22, and the Building Control Act defines a geotechnical engineer as a PE registered as a specialist in the specialised branch of geotechnical engineering. "Structural engineer" is used in the statutes for the PSI role, meaning a PE in the civil or structural discipline, and BCA's structural page uses the same civil or structural wording for who may apply for structural plan approval.
What a PE endorsement costs
Neither PEB's pages nor BCA's, as we read them on 9 October 2026, publish a fee for engineering services, so we are not going to quote a number. Fees are agreed between you and the PE or their practice. They usually turn on the scope, whether the PE has to inspect and investigate the existing structure, and how good the existing drawings are. The Professional Engineers Act has one rule worth knowing here: under section 18, a person not authorised by the Act to supply professional engineering services cannot sue for or recover a fee for them, and someone who paid such a person unknowingly can recover the money.
BCA's own plan fees are separate. The structural plans page says they are calculated on Statistical Gross Floor Area, at rates that depend on whether the building is general or specified and whether the plan is a main or amendment plan, and refers to a separate guide for the amounts.
Penalties
Works without approval. Under section 20(1) of the Building Control Act, anyone who commences or carries out, or permits or authorises, building works whose plans have not been approved or deemed approved, or for which no permit under section 6 is in force, is liable on conviction to a fine of up to S$200,000 or imprisonment of up to 2 years or both, plus up to S$1,000 a day for a continuing contravention and up to S$2,000 a day if it continues after conviction. Breaching a term or condition of an approval or permit carries up to S$20,000 or 12 months or both. Deviating in any material way from the approved plans carries up to S$100,000 or 2 years or both.
Practising without registration. Under section 15(10) of the Professional Engineers Act, a person who practises a prescribed branch without being authorised, signs and submits engineering documents without a practising certificate, uses the title, or holds out or supplies engineering services in breach of the Act, is liable to a fine of up to S$5,000. A repeat offender who is an individual faces up to S$10,000 or 6 months' imprisonment or both.
What the PE needs from you on an existing building
Most PE endorsements on existing buildings, whether for A&A, strengthening or a statutory inspection, start from the same question: what is actually there? The regulations make the existing building the reference point. Regulation 5 asks the PE to inspect the building and investigate its overall structure before certifying, and the A&A submission has to show the new works against the existing building. The original approved plans are the obvious starting point, and our guide to buying plans from BCA explains how to get them.
The trouble is that older buildings rarely match their plans. Walls have moved, slabs have been opened, and the archived set may be incomplete or missing. That is where measured documentation comes in. 3D laser scanning records the building as it stands, and as-built documentation turns the scan into dimensioned plans, sections and elevations, or a model through scan-to-BIM, that the PE and the architect can design from. For inspections, our structural inspection support provides measured structural layout records for the PE carrying out the inspection.
To be clear about the boundary: Volumet is not a Professional Engineer, holds no PE registration and does not endorse plans, calculations or reports. We are not a QP and we do not make submissions to BCA or SCDF. We produce the existing-condition drawings and data that the PE works from. Any judgement about the structure, and every signature that carries authority, stays with your PE. If you are not sure whether your PE needs a survey at all, tell us the building and what the PE has asked for, and we will say honestly if the existing plans are enough.
Rule of thumb: check the PE on the PEB directory, confirm the branch matches the work, and give them the best record of the existing building you can. Measurement only becomes worth paying for when the plans and the building disagree.