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# CORENET X: which Singapore projects must use it?
- URL: https://www.southeastasiaconnect.com/corenet-x-singapore-project-submission-guide/
- Published: 2026-10-31T18:40:09.000Z
- Updated: 2026-10-31T18:40:09.000Z
- Description: New projects with at least 5,000 square metres of floor area face the gateway requirement. Smaller projects and qualifying ongoing submissions have different routes.
- Author: Southeast Asia Editorial Team
- Tags: Briefing, #sea-section-briefing, Singapore, Construction

For a Singapore developer or consultant, the first preparation task is to check project scope and submission history before building an approval model. [CORENET X](https://info.corenet.gov.sg/?ref=southeastasiaconnect.com) brings designs through coordinated agency gateways; the team needs to know which route applies before assigning the information each discipline must supply.

## Check the project, then its submission history

From 1 October 2026, CORENET X gateway submissions are mandatory for new projects with gross floor area of at least 5,000 square metres. The [Building and Construction Authority’s July announcement](https://www1.bca.gov.sg/resources/newsroom/opening-address-by-minister-chee-hong-tat-at-the-singapore-archifest-2026-opening-reception-and-exhibition/?ref=southeastasiaconnect.com) changed the earlier plan to bring all new projects onto the system. Projects below 5,000 square metres can continue through CORENET 2.0 for now; moving them onto the gateway process is voluntary.

The [joint circular with the Urban Redevelopment Authority](https://info.corenet.gov.sg/docs/default-source/bca-circulars/circular-for-updates-to-corenet-x-implementation-plan.pdf?sfvrsn=d8a19259%5F1&ref=southeastasiaconnect.com) defines the scope. It covers new buildings, additions or extensions creating at least 5,000 square metres of additional floor area, and major alterations affecting or replacing at least that area. Its definition of a new project also depends on whether formal development submissions have already begun.

A project at or above the threshold that commenced the relevant submissions through CORENET 2 by 30 September 2026 may continue there for now. The circular identifies the relevant ongoing submissions as those seeking clearances equivalent to the Design Gateway, including provisional permission and development-control clearances. The project team should check that history before choosing a portal.

## Agree what each approval stage needs

For projects using the [three-gateway process](https://info.corenet.gov.sg/regulatory-process/about-the-new-submission-process/3-gateway-process?ref=southeastasiaconnect.com), the Design Gateway resolves parameters affecting the design and client brief. The Construction Gateway coordinates detailed requirements before main structural works; the Completion Gateway records as-built plans and supports occupancy or completion approval. There is an optional piling gateway, while simpler projects may use the separate Direct Submission Process.

That sequence makes the information handover a team decision. Before modelling, agree which discipline supplies each required item and when it must be coordinated with the others. Agency-specific independent submissions can proceed alongside gateway submissions where applicable.

## Test the exported model before committing a submission

The official [IFC+SG onboarding checklist](https://info.corenet.gov.sg/ifc-sg/start-here/ifcsg-onboarding-checklist?ref=southeastasiaconnect.com) gives a practical preparation sequence: understand the gateway requirements; review the required objects, properties and Singapore property sets; configure the authoring tool and export settings; then review the exported models together.

Check geometry, coordinates, discipline alignment and completeness in the exported models. Use the available validation tools, resolve the findings and recheck. Buying modelling software or successfully exporting a file does not establish that the submission is complete.

Use the current [CORENET X Code of Practice](https://info.corenet.gov.sg/regulatory-process/corenet-x-code-of-practice?ref=southeastasiaconnect.com) for detailed information requirements, alongside the agencies’ circulars for implementation dates. Its index lists Edition 4, dated September 2026; the July circular’s reference to Edition 3.1 is therefore an older pointer. The [official preparation resources](https://info.corenet.gov.sg/overview/about-corenet-x/getting-ready-for-corenet-x?ref=southeastasiaconnect.com) also link to training and assisted onboarding.

The useful checkpoint is a coordinated, reviewed model and a clear submission route. Validation is a preparation check; the agencies make the approval decisions.