A Professional Engineer qualifies as an Accredited Checker (AC) in Singapore only after meeting the statutory minimums under the Building Control (Accredited Checkers and Accredited Checking Organisations) Regulations: registration in the civil or structural discipline, at least 10 years of post-registration experience in Singapore, and professional indemnity cover of at least S$500,000. Beyond eligibility, the AC’s statutory duty is to perform an independent structural check, separate from the design team, before BCA approves the plans.

TL;DR:

• Accredited Checkers must have at least 10 years of post-registration experience in Singapore and carry professional indemnity insurance of at least S$500,000, with a possible waiver when operating under an Accredited Checking Organisation.
• The AC’s review involves verifying specific codes, analyzing foundations independently, checking load paths, and ensuring drawings match calculations without collaborating with the original design team.
• Submission requires precise forms, including independent calculations, an AC checklist, and an evaluation report, all lodged via CORENET X within strict timelines.
• Projects exceeding S$15 million in value must engage an Accredited Checking Organisation with a qualified team and higher professional indemnity coverage of at least S$2 million.
• Common rejection points include incomplete calculations, mismatched drawings, late AC appointment, and poor pre-lodgement checks, which should be addressed proactively to avoid delays.

Table of Contents

• Who Qualifies as an Accredited Checker or Specialist AC
• How to Apply for AC Registration and Renewal
• What an Accredited Checker Must Actually Review
• Documents and Forms Required for AC Submissions
• Processing Timelines and the CORENET X Transition
• When a Project Needs an Accredited Checking Organisation
• Specialist Accredited Checker: Geotechnical Requirements
• Avoiding the Most Common Submission Rejections
• Record Plans and Obligations After Works Complete
• A Practitioner’s View on Independence and Timing
• How We Support Accredited Checker Submissions
• FAQ
• Sources

Who Qualifies as an Accredited Checker or Specialist AC

Eligibility for AC registration is fixed by statute, not by reputation or client preference. A candidate must hold Professional Engineer registration under the Professional Engineers Act in the civil or structural discipline, and must have accumulated at least 10 years of post-registration professional experience in Singapore before the Building Control regulations will recognize the application.

Specialist Accredited Checkers in geotechnical engineering face a different experience split, reflecting the narrower and higher-risk nature of ground engineering work:

• 10 years post-registration, with at least 5 of those years spent on geotechnical engineering work in Singapore.
• 15 years post-registration, with at least 5 years in geotechnical engineering, for engineers who built broader general experience before specializing.
• Standing and recognition within the profession also factor into approval, since the Commissioner of Building Control and the Accreditation Selection Panel may interview candidates before confirming registration.
• Professional indemnity insurance of at least S$500,000 is mandatory for an individual AC, a figure set out explicitly in the regulations.
• A waiver of individual PI cover can apply when the AC operates under an Accredited Checking Organisation that carries its own policy, since the ACO’s cover substitutes for the individual’s.

These thresholds exist because the AC’s signature carries legal weight: it tells BCA that someone outside the design team independently verified the structure. For background on how PE registration itself works in Singapore, see our overview of professional engineers’ role in building safety.

How to Apply for AC Registration and Renewal

Applying for AC status, or renewing an existing registration, follows a defined administrative path rather than an open-ended review. Preparing the full packet before submission avoids the back-and-forth that extends processing well past the statutory timelines discussed later.

1. Pay the application fee. A registration fee applies per application or renewal, payable at the point of lodgement with the Commissioner of Building Control, as set out in the Building Control regulations.
2. Assemble proof of PE registration showing discipline (civil or structural) and registration date, since the 10 year clock runs from that date.
3. Document post-registration experience, including project records, employer references, and, for geotechnical specialists, a clear breakdown of years spent specifically on geotechnical work.
4. Provide evidence of professional indemnity insurance meeting the S$500,000 minimum, or confirmation of ACO coverage where the waiver applies.
5. Prepare for a possible interview with the Accreditation Selection Panel, which may probe technical judgment and independence rather than just paper qualifications.
6. Submit the complete file in one lodgement rather than piecemeal, since incomplete submissions are a common source of delay.

Renewal applications follow the same fee structure and documentation logic, so keeping experience and insurance records current year to year saves time when renewal falls due.

What an Accredited Checker Must Actually Review

The AC’s job is defined in detail by the Second Schedule of the Building Control (Accredited Checkers and Accredited Checking Organisations) Regulations, which sets out a specific list of technical tasks rather than a general review. Treating it as a checklist, rather than a formality, is what distinguishes a defensible check from a rubber stamp.

The Second Schedule requires the AC to:

• Determine which codes of practice apply to the structure and confirm the design loadings adopted, including wind loads and surcharge conditions.
• Analyze foundations, piles, and earth-retaining structures independently of the original designer’s assumptions.
• Check long-span beams, trusses, and transfer beams, which carry disproportionate risk if miscalculated.
• Review connections and detailing, since joint failures are a common point of structural weakness.
• Verify that structural drawings match the calculations submitted, catching discrepancies between what was designed and what was drawn.
• Confirm that material specifications in the calculations align with those shown on the drawings.

The independence requirement runs through all of this. An AC does not collaborate with the original design engineer to refine a scheme; the AC checks it from the outside, using an original set of calculations rather than re-deriving the designer’s numbers. That separation is what gives the AC’s certificate its evidentiary value to BCA.

The deliverable is a certificate, commonly referred to as Form A, accompanied by an evaluation report that documents the independent calculations performed. Architectural coordination tends to generate the most friction here, since loading assumptions tied to openings, cladding, or floor levels can shift after the structural model is built; this interplay often involves MCST rules Singapore condo owners need, BCA guide + checklist when AC duties intersect with strata management.

Pro Tip: Request the architectural drawing set and the geotechnical report at the same time as the structural calculations, since mismatches between the three are the most frequent cause of AC queries back to the design team.

Documents and Forms Required for AC Submissions

A structural plan submission involving an AC needs specific named forms, not a generic cover letter. Missing or mismatched forms are a routine cause of BCA queries, so assembling the exact set in advance matters more than most practitioners expect.

According to BCA’s structural plan submission guidance, a complete AC submission includes:

• The Accredited Checker’s Certificate (Form BCA-BE-STAPPV01–ACC), signed by the registered AC.
• The Accredited Checker’s Checklist (BCA-BE-ACCHECKLIST), confirming each Second Schedule item was addressed.
• An evaluation report containing the independent structural analysis and design check calculations, not a summary of the original designer’s work.
• Standard certification appendices for record plans, which carry forward into the post-completion stage discussed later in this guide.
• C-form obligations that follow once construction finishes, tying the AC’s certification to the final as-built record.

All of this is lodged through CORENET X, where supporting files need to be organized so reviewers can match each form to its corresponding calculation set. Our construction compliance checklist for Singapore projects walks through packaging these documents before lodgement.

Processing Timelines and the CORENET X Transition

BCA’s processing clock depends on whether a structural submission involves an Accredited Checker at all, and whether it runs through the standard channel or the cross-agency CORENET X pathway. Mandatory CORENET X adoption from October 1, 2026 changes how project teams need to package files ahead of lodgement.

These figures come from BCA’s structural plan submission page. The jump from 10 to 20 working days under CORENET X reflects the joint review across multiple authorities rather than a single BCA desk, so project teams should build that longer window into their planning once the mandatory date arrives.

Part ST staged submissions allow large or complex projects to lodge detailed structural calculations in parts rather than as one block, with AC or ACO endorsements attached to each part as it becomes ready. Our guide to BCA ST submissions covers how to map which elements belong in each stage.

When a Project Needs an Accredited Checking Organisation

An individual Accredited Checker cannot undertake AC work on their own behalf once a project’s building works exceed S$15 million in value, under the notification governing the value threshold. Above that figure, the check must come from a registered Accredited Checking Organisation rather than a sole practitioner.

An ACO carries firm-level obligations that go beyond what an individual AC needs:

• At least one registered Accredited Checker on staff, excluding specialist geotechnical ACs for this particular role.
• At least 2 Professional Engineers in the civil or structural discipline among its staff.
• At least 2 other engineers, or staff eligible for PE registration, supporting the technical team.
• ISO 9001 certification covering the scope of structural design services the ACO provides.
• Professional indemnity insurance of at least S$2,000,000, four times the individual AC minimum, reflecting the larger project values an ACO is permitted to handle.

For developers running projects near the S$15 million line, confirming which checking route applies early avoids a late scramble to engage an ACO.

Specialist Accredited Checker: Geotechnical Requirements

Specialist Accredited Checkers in geotechnical engineering sit on a different experience track from general structural ACs, and their review scope is narrower but deeper on ground-related risk. The Building Control regulations set two paths to qualify: 10 years post-registration with at least 5 years in geotechnical engineering in Singapore, or 15 years post-registration with the same 5-year geotechnical minimum for engineers who specialized later in their careers.

A specialist AC reviews specific geotechnical elements distinct from regular structural checks.

• Completeness of the site investigation against the ground conditions the project actually encounters.
• Sufficiency of laboratory testing supporting the geotechnical parameters used in design.
• Suitability of the proposed tunneling or excavation method for the soil and groundwater conditions.
• Adequacy of instrumentation and monitoring plans for excavations and retaining structures.
• Load-test results for piles and foundations against the design assumptions.

Reporting expectations mirror the structural AC’s evaluation report, with instrumentation monitoring frequency documented so BCA can see how ground movement will be tracked once works begin. Our geotechnical analysis guide covers how these site investigation and monitoring steps fit into a typical project sequence.

Avoiding the Most Common Submission Rejections

Most AC-related rejections trace back to a small set of recurring gaps rather than genuinely novel problems. Addressing these before lodgement is faster than fixing them after a BCA query comes back.

1. Missing or incomplete independent calculations. An evaluation report that summarizes rather than independently derives the check is routinely sent back.
2. An incompletely filled AC checklist. Every item on the BCA-BE-ACCHECKLIST needs a response, not just the ones that are straightforward.
3. Inconsistency between drawings and calculations. Reviewers cross-check both documents, and a mismatch on load paths or member sizes stalls the file.
4. Late AC appointment. Bringing the AC in after the design is largely fixed removes the chance to catch misaligned assumptions before they are baked into the drawings.
5. Weak pre-lodgement checks. Reconciling calculation assumptions against architectural drawings, confirming pile and soil parameters match the geotechnical report, and indexing each calculation file to its corresponding drawing sheet catches most issues before BCA sees them.

Pro Tip: Build a one-page index mapping each calculation file to the drawing sheets it supports; reviewers use this to spot-check consistency, and its absence often triggers a request for clarification on its own.

For a fuller walkthrough of these checks, our compliance checklist for Singapore projects sets out the same logic in more detail.

Record Plans and Obligations After Works Complete

An Accredited Checker’s responsibilities do not end when construction finishes. The record structural plan guidance sets out certification duties that fall due once the structure is built.

• The Qualified Person for Supervision and the Qualified Person for Design must submit certificates, commonly Forms C1, C2, and C3, confirming the works match the approved plans.
• Where an AC was involved, the AC’s certificate and evaluation report are required alongside the QP certificates for record plan purposes.
• These submissions are due within 14 days of completion or of the AC or QP ceasing their duties on the project, whichever triggers first.
• Any immaterial departures from the approved plans need to be documented in the appendices, with the AC confirming that the deviation does not compromise structural adequacy.

Missing this 14-day window is a common closeout gap, particularly on projects where the original AC has moved on to other work.

A Practitioner’s View on Independence and Timing

The hardest part of AC work is not the technical check itself. It is holding independence while still coordinating closely enough with the QP and the builder to keep a project moving. An AC who second-guesses every design decision in isolation creates friction without adding safety value; an AC who defers too readily to the design team undermines the entire reason the role exists.

The biggest misperception we encounter is treating the AC as a late-stage formality rather than a design-stage safeguard. Brought in early, an AC catches load and detailing mismatches while they are still cheap to fix.

— Aman

How We Support Accredited Checker Submissions

Preparing an AC submission that clears BCA on the first pass takes more than meeting the statutory minimums on paper. We provide engineering and geotechnical consultation, professional endorsements, and submission support aligned with the relevant compliance checks and documentation requirements. We assist in determining the applicable checking route for projects near regulatory value thresholds before submission rather than after a rejection. If you need support preparing an AC-ready submission package, visit our services page or get in touch about PE endorsement and authority submissions for your next project.

FAQ

What are the requirements for an Accredited Checker to be approved by BCA?

An Accredited Checker must hold Professional Engineer registration in the civil or structural discipline, have at least 10 years of post-registration experience in Singapore, and carry professional indemnity insurance of at least S$500,000. A S$150 application fee applies, and the Accreditation Selection Panel may interview candidates before confirming registration.

What is an Accredited Checker?

An Accredited Checker is a Professional Engineer registered to independently verify structural calculations and drawings before BCA approves a building’s structural plans. Their role, defined under the Second Schedule of the Building Control regulations, is to check the design from outside the original design team rather than contribute to it.

What experience is needed to become a specialist Accredited Checker in geotechnical engineering?

A specialist AC needs either 10 years of post-registration experience with at least 5 years in geotechnical engineering in Singapore, or 15 years post-registration with the same 5-year geotechnical minimum. This track exists separately from the general structural AC qualification.

When does a project require an Accredited Checking Organisation instead of an individual AC?

A project requires an Accredited Checking Organisation once the building works exceed S$15 million in value, since individual Accredited Checkers cannot undertake work on their own behalf above that threshold. ACOs must meet staffing, ISO 9001, and professional indemnity requirements beyond what an individual AC needs.

What are the requirements to become a Professional Engineer in Singapore?

Professional Engineer registration is a separate credential governed under the Professional Engineers Act, and it is the baseline qualification an Accredited Checker must already hold in the civil or structural discipline. Specific registration criteria for PE status itself sit outside BCA’s Accredited Checker regulations and are set by the Professional Engineers Board.

Sources

• Building Control (Accredited Checkers and Accredited Checking Organisations) Regulations
• Structural plan submission | Building and Construction Authority
• Building Control (Accredited Checkers and Accredited Checking Organisations) Regulations (Compiled)

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• PE Registration Requirements Singapore List: The Full Checklist
• Common Reasons for PE Submission Rejection
• PE compliance in Singapore: what developers must know