CORENET-X Singapore: The Complete 2026 Guide for Owners, Developers, and Consultants

In short: CORENET-X is the Building and Construction Authority of Singapore's new digital regulatory submission platform, replacing the legacy CORENET system. It requires BIM-based, model-driven submissions federated across architectural, structural, and MEP disciplines. Since 1 October 2025, CORENET-X is mandatory for all new projects with gross floor area (GFA) of 30,000 m² or more. From 1 October 2026, the mandate extends to all new building projects regardless of size. Projects above 5,000 m² GFA have additional BIM model data inclusion requirements. Professional Engineer (PE) endorsement remains legally required and is unchanged by the move to CORENET-X.

Key Facts

• Operator: Building and Construction Authority of Singapore (BCA), with input from Urban Redevelopment Authority (URA)

• Platform: CORENET-X, replacing legacy CORENET

• 1 October 2025: mandatory for new projects with GFA ≥ 30,000 m²

• 1 October 2026: mandatory for all new building projects regardless of size

• BIM model data inclusion: required for projects with GFA > 5,000 m² (independent of CORENET-X mandate)

• Disciplines required to submit in BIM: Architecture, Structural, MEP

• PE endorsement: unchanged — PE Civil for structural, PE Geotechnical for geotechnical, etc.

• Reference circulars: BCA APPBCA-2025-20, URA URA/PB/2025/07-DCG, URA DC25-07

  What is CORENET-X?

  CORENET-X is the Building and Construction Authority's new digital submission platform for regulatory approvals across the Singapore building lifecycle. It is the successor to CORENET (Construction and Real Estate NETwork), which has handled regulatory submissions in Singapore since the early 2000s.

  The change is more than cosmetic. CORENET handled flat-PDF, document-based submissions. CORENET-X requires a model — specifically, a BIM model federated across architectural, structural, and MEP disciplines, with object classification, property data, and information delivery structures conforming to BCA's technical specifications.

  Submissions reviewed by BCA on CORENET-X include automated checks: clash detection, model federation integrity, classification correctness, and information completeness. Returned submissions can identify deficiencies at a much more granular level than was possible with PDF-based review.

  When is CORENET-X Mandatory?

  Already mandatory

  Since 1 October 2025: all new projects with GFA ≥ 30,000 m² must submit through CORENET-X.

  Coming on 1 October 2026

  All new building projects, regardless of GFA, must submit through CORENET-X.

  Independent of CORENET-X mandate

  Projects with GFA > 5,000 m² are required to include BIM model data with key data structures and object properties — this requirement applies whether or not the project falls under the CORENET-X tier.

  The trigger for CORENET-X applicability is the submission date, not the project start date. A project that begins design in 2026 but doesn't submit structural plans until on or after 1 October 2026 will fall under the universal mandate.

  What CORENET-X Means for You

  If you are an owner or developer

  Engage CORENET-X-ready consultants now. Mid-project conversion from 2D CAD to BIM is expensive (often 15–30% of design fees) and slow (adds weeks to months). Starting in BIM from day one avoids this entirely.

  Verify your consultants' BIM workflow maturity. Ask: which BIM authoring tool does each discipline use? Have they delivered a federated BIM submission to BCA before? Can they show their clash detection process?

  Budget appropriately. CORENET-X-ready BIM design fees are typically 10–25% higher than legacy 2D submission fees, but this is offset by faster construction and lower BCA rejection risk.

  If you are an architect or developer's project manager

  Coordinate model federation early. Lock the BIM Execution Plan (BEP) at design start. Engage PEs who already work in BIM — PE endorsement on a BIM-based submission requires the PE to verify model integrity, not only design correctness.

  If you are a consultant

  Have a BIM-capable structural workflow. Build CORENET-X submission templates. Run mock submissions internally before sending to BCA.

  Common BCA Comments on CORENET-X Submissions

  1. Federation issues — disciplines submitted as separate models without proper federation

  2. Object classification gaps — structural objects not correctly classified per BCA's specification

  3. Missing property data — load class, fire rating, material spec, or other required object properties not populated

  4. Information Delivery Requirements (IDR) non-conformance

  5. Clash detection deficiencies — high-severity clashes not resolved or not reported

  6. Model quality issues — geometry errors, redundant elements, broken references

  7. PE endorsement attachment errors

  8. Cross-discipline coordination missing — structural model not reflecting late architectural changes

     Pricing

     • Small project (<10,000 sqm) with BIM-first design: from S$15,000

     • Mid-size (10,000–30,000 sqm): S$25,000–S$70,000

     • Large (30,000–100,000 sqm): S$60,000–S$200,000

     • Mega-project (>100,000 sqm): S$200,000+

     • CORENET-X resubmission only: S$5,000–S$30,000

     • CORENET-X readiness audit: S$3,000–S$8,000

     Typical Timelines

     • <10,000 sqm: 4–8 weeks

     • 10,000–30,000 sqm: 6–12 weeks

     • 30,000–100,000 sqm: 12–20 weeks

     • Resubmission cycle: 2–4 weeks

     These timelines assume the consultant team is BIM-mature. Teams converting from 2D mid-project should add 30–50%.

     Choosing a CORENET-X-Ready PE

     1. PEB registration current — verify on the Professional Engineers Board directory

     2. CORENET-X submission track record — ask for at least one prior CORENET-X-cleared project

     3. BIM authoring proficiency — the PE or their team should be operating directly in the BIM tool

     4. Federation experience — coordinating with architectural and MEP disciplines

     5. PE Civil for structural, PE Geo for geotechnical — discipline match per Singapore PE Act

     6. Personal endorsement — the named PE physically endorses, not delegated

        About CVC Engineers and CORENET-X

        CVC Engineers Pte Ltd is operating in CORENET-X / BIM workflows now. Lead PE: Er. Cavan Chai Han Hon, PE (Civil), PEB Reg. No. 5376. PE (Geotechnical) coverage via our strategic partner panel of registered PE Geo consultants experienced in foundations, ERSS, deep excavation, and tunnel work.

        300+ projects completed across HDB, LTA, PUB, MOE, MHA, BCA, and the private sector. Located at 9 Tagore Lane #B1-01, Singapore 787472.

        If you're planning a project that will submit on or after 1 October 2026 — or if you have a project already over the 30,000 sqm threshold — talk to us. Mid-project conversion from 2D to BIM is expensive. Starting BIM-first is not.

        Phone: +65 9342 7551 · Email: stephen@cvcengineers.com

        Request a CORENET-X Submission Quote »

     7.