The headline change
From 1 October 2026, every Building Plan submission in Singapore must go through CORENET-X. The legacy CORENET system — 2D PDF + DWG drawings submitted sequentially to each authority — will no longer be accepted for new applications.
CORENET-X is BCA's response to two decades of submission inefficiency: the average BP project used to require separate, sequential reviews by BCA, SCDF, URA, NEA, and PUB. Each authority issued queries independently. Coordination errors weren't caught until late-stage. Resubmissions were common. Total review timelines stretched 4–8 months for complex projects.
What CORENET-X requires that CORENET didn't
1. BIM-based submission
The submission package must include IFC-format Building Information Model files with embedded metadata. Flat 2D PDFs and DWG files alone won't pass the validation gate. The model must be coordinated across architecture, structure, and M&E disciplines.
For QP-S (Structural), the practical requirement is a structural IFC export from your BIM tool — Revit, Tekla, ArchiCAD, Allplan, or any IFC-compliant authoring software. The model must contain the full structural geometry (columns, beams, slabs, walls), member sizes, material properties, and design parameters at the level of detail BCA's automated checker expects.
2. Standardised digital signatures
PE endorsement is now applied as a digital signature certificate, not a wet ink seal scanned to PDF. The signature is bound to the IFC model and travels with every authorised version of the submission. This makes tampering effectively impossible and creates a tamper-evident audit trail.
3. Automated pre-checks
Before the submission reaches a human reviewer, CORENET-X runs:
- Geometric clash detection — structural elements vs. M&E ducts, structural vs. architectural envelope
- Planning rule checks — GFA, plot ratio, height, setback compliance against URA Master Plan
- Compliance pre-checks — minimum corridor widths, headroom, fire-rated separation completeness
If pre-checks fail, the submission bounces back before consuming reviewer time. This is faster — but it also means submissions that previously worked under CORENET will fail under CORENET-X if the BIM hygiene isn't there.
4. Multi-authority parallel review
CORENET-X routes the same submission to all relevant authorities simultaneously:
- BCA — structural, building plan, ERSS, buildability
- SCDF — Fire Safety Plan, FSP-1, FSP-2, performance-based fire engineering
- URA — Written Permission, change of use, conservation overlay
- NEA — environmental, noise, dust, hawker layout
- PUB — sanitary, drainage, water-supply
- LTA (conditional) — Railway Protection if within MRT Restricted Zone
All queries are aggregated in one applicant dashboard. Resubmissions update the central record once, not five times.
What stays the same
- The Building Control Act and its requirements for PE endorsement
- Fee structures (subject to BCA's fee schedule, which updates annually)
- The need for a registered Qualified Person (QP-Architecture, QP-Structural, etc.)
- BCA's review depth and rigor — the platform changes; the technical bar doesn't
- Site supervision requirements under Section 12 BC Act
- TOP and CSC requirements at completion
Practical implications for owners
- Pick a CORENET-X-ready PE early — Not every firm has invested in IFC workflow. Ask if their last 5 submissions were BIM-based.
- Architectural-structural BIM coordination matters more — Late-stage design changes are more expensive because they require re-export and re-coordination of the model.
- Faster approvals, but only if your BIM is clean — Projects with disciplined BIM clear faster. Projects without clean BIM will fail pre-checks and slow down.
- Records persist — Every CORENET-X submission is permanently archived with cryptographic signatures. Future regularisation cases will have authoritative records to compare against.
Practical implications for QP-S firms
- Tooling investment: Revit / Tekla / Allplan licences and IFC export workflows
- Digital signature certificate procurement and renewal
- Updated submission checklists for IFC LOD (Level of Detail) requirements
- Coordination with QP-Architecture upstream — your structural model must align with theirs
- Updated fee structures to reflect BIM-based effort
Common questions
What about projects already in CORENET review when 1 Oct 2026 hits?
Existing applications continue under the legacy CORENET workflow until they're approved or rejected. Only new applications submitted after 1 October 2026 must use CORENET-X.
Is small A&A work in scope?
Yes — any submission that requires BCA Building Plan approval is in scope. The BIM requirement scales with the size of the project, so a single-bedroom A&A doesn't need the same model fidelity as a 20-storey tower.
What if my architect doesn't use BIM?
That becomes a project-level problem. Either the architect adopts BIM, or you appoint a BIM coordinator separately. Submitting in CORENET-X with an architect who only produces 2D drawings is technically possible but very inefficient.
How CVC Engineers handles CORENET-X
CVC Engineers' QP-S workflow has been BIM-based since 2024. Every submission we lodge uses IFC, digital signatures, and coordinates upstream with the architectural QP. We've handled CORENET-X submissions on residential, commercial, industrial, and conservation projects. Our BCA Submissions service page has the full workflow diagram.
Submitting after 1 October 2026? Contact CVC Engineers — we'll confirm whether your project is CORENET-X-ready and what BIM coordination is needed before lodgement.