Eurocodes are the structural design standards used for building works in Singapore, published locally as the SS EN series and applied together with the corresponding Singapore National Annexes (NA). For any project that needs structural plan approval from the Building and Construction Authority (BCA), the design must follow this framework consistently, and it must be submitted by a Qualified Person (QP) who is a registered Professional Engineer. This article explains how the system is structured, where projects commonly fail, and how the Eurocode framework connects to the other authority submissions a project typically needs.

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TL;DR

Singapore has used the Eurocodes (SS EN 1990 to 1999 series) as its structural design standards since the co-existence period with British Standards ended, and every SS EN part must be read with its Singapore National Annex.
Where no Singapore National Annex exists for a part, the relevant UK National Annex is the default reference under the BCA Approved Document.
Mixing Eurocode and legacy British Standard provisions within the same building design is not acceptable and is a recurring cause of rejected submissions.
Only a QP who is a registered Professional Engineer in the civil or structural discipline can apply for structural plan approval.
CORENET X became mandatory for all new projects on 1 October 2026, so submission planning now begins with coordinated, multi-agency data.

What the Eurocodes are and how Singapore applies them
The regulatory basis: the BCA Approved Document
Who may submit: the role of the Qualified Person
Common reasons Eurocode-based submissions are queried or rejected
Eurocode design is one of several approvals
CORENET X and the submission workflow
A practical sequence for a Eurocode-compliant submission
Our perspective
Support for Eurocode-based design and submissions
FAQ
Sources

What the Eurocodes are and how Singapore applies them

The Eurocodes are a family of structural design standards covering the basis of structural design, actions on structures, and the design of concrete, steel, composite, timber, masonry and aluminium structures, as well as geotechnical design and earthquake resistance. In Singapore they are adopted as Singapore Standards with the prefix SS EN, and each part is issued with a National Annex that fixes the nationally determined parameters, such as partial factors, load values and choices left open by the European text.

The practical consequence is that the SS EN text alone is never a complete design basis. A guide to SS EN 1990 is only usable alongside its National Annex, and the BCA Approved Document lists each Eurocode part with the Singapore National Annex that accompanies it. The same pairing applies to SS EN 1991 (actions), SS EN 1992 (concrete), SS EN 1993 (steel), SS EN 1997 (geotechnical design) and SS EN 1998-1 (seismic design).

Seismic design is a useful example of how selective the adoption is. Among the earthquake-resistance parts, only EN 1998-1 has been adopted as a Singapore Eurocode, and a Singapore National Annex to it has been published and amended since.

The regulatory basis: the BCA Approved Document

The legal route to using the Eurocodes runs through the Building Control Regulations. The BCA issues an Approved Document under Regulation 27 of those regulations, and it sets out “acceptable solutions” that are deemed to satisfy the statutory performance requirements. The Approved Document includes an annex listing the structural design standards based on the Eurocodes and their Singapore National Annexes, and a second annex comparing legacy Singapore/British standards with their Eurocode equivalents.

Three rules in that document shape daily practice:

Reference to a Eurocode includes its Singapore National Annex. Citing SS EN 1992-1-1 in calculations without applying the Singapore NA parameters is an incomplete reference.
The UK National Annex is the fallback. Where no Singapore National Annex exists for a part, the relevant UK National Annex is used.
Inappropriate mixing is not acceptable. During the co-existence period, either the British-based standards or the Eurocodes could be used, but combining them within the same building design was not permitted. That co-existence period has ended, and the BCA structural plan submission requirements now treat the Eurocodes as the accepted standard for structural design.

The Approved Document also extends the Eurocode basis to product and execution standards, so material specifications and construction requirements need to be consistent with the design standard chosen.

Acceptable Solutions versus Alternative Solutions

Designs that follow the Approved Document’s Acceptable Solutions are deemed to satisfy the performance requirements. A design that departs from them may be proposed as an Alternative Solution, but it requires substantial justification and evaluation. For most buildings, following the Acceptable Solutions, meaning the Eurocodes with their Singapore National Annexes, is the more direct route to approval and carries fewer review cycles.

Who may submit: the role of the Qualified Person

Under the Building Control Act, structural works require a Qualified Person. The BCA states that only a QP who is a registered Professional Engineer in the civil or structural discipline can apply for structural plan approval. The QP carries primary legal responsibility for the structural design and its certification.

This is a point on which property owners are often misinformed. Appointing a contractor does not discharge the requirement, and works carried out without the proper QP appointment may be treated as unauthorized, which can lead to rectification or removal before a Certificate of Statutory Compliance can be obtained.

The QP’s design also needs a defensible geotechnical basis. The BCA’s guidelines for ST plan applications include a section on site investigation, pre-construction survey and geotechnical parameters to EC7, which is the geotechnical Eurocode (EN 1997). For projects with excavation, retaining structures or piling, the ground model is therefore part of the Eurocode design record, not a separate exercise.

Common reasons Eurocode-based submissions are queried or rejected

The following issues recur in structural plan evaluation. Each is avoidable at the design stage.

Issue	Why it matters	Preventive step
Mixing British Standard and Eurocode provisions in one design	The Approved Document does not accept inappropriate mixing within the same building design	Fix the design framework at the start and apply it to every element, including legacy-building interfaces
Citing a Eurocode without the Singapore National Annex	Nationally determined parameters will differ from the base European text	State the NA and edition used in the design basis report
Using an outdated edition or amendment	National Annexes are revised, for example the seismic NA carries a 2021 amendment	Confirm current editions on the Singapore Standards listing before calculations are issued
Weak geotechnical parameters	EC7 design depends on site investigation data	Commission the site investigation early and align it with the EC7 design approach
Treating the Eurocodes as a substitute for fire requirements	Fire resistance is separately regulated	Coordinate with the SCDF submission and the Fire Code 2023

Eurocode design is one of several approvals

A structural plan approved against the Eurocodes does not by itself authorize a project to proceed. Depending on the project type, several agencies apply separate requirements, and the sequence matters.

BCA and URA

Building plans are submitted to the BCA through a QP in accordance with the Building Control Regulations, as described on the BCA’s building plan submission page. Planning parameters such as use, gross floor area and building envelope are controlled by the Urban Redevelopment Authority (URA). For landed houses, the URA’s guidance on additions and alterations to a landed house sets out when a plan lodgment application applies. Our articles on BCA submission versus URA submission and the URA submission process timeline describe how the two approvals relate.

JTC industrial properties

Industrial tenants in JTC-managed premises face an additional layer. JTC’s guide to applying for plan consent explains that its landowner consent is a formal submission made through CORENET. Landowner consent is not the same as statutory plan approval: the approvals from agencies such as BCA and SCDF are separate and must also be obtained before works begin. Further detail is in our guides to JTC plan consent for industrial A&A works and the five-step renovation approval flow.

SCDF fire safety

Under the Fire Safety Act 1993, any person intending to carry out fire safety works must first obtain approval of plans from the Singapore Civil Defence Force, as stated on the SCDF plan approval page. The technical benchmark is the Code of Practice for Fire Precautions in Buildings 2023. Where structural elements such as mezzanines carry fire-resistance requirements, the Eurocode structural design and the fire submission need to be consistent. See our notes on SCDF mezzanine requirements and fire engineering design and SCDF compliance.

CORENET X and the submission workflow

Submission infrastructure has changed alongside the technical standards. The BCA’s page on record structural plans states that CORENET 2.0 will eventually be replaced by CORENET X, which is mandatory for all new projects by 1 October 2026. As of this article’s date, that threshold has passed, so new projects should be prepared on the assumption of an integrated, cross-agency submission.

The practical effect for structural design is earlier coordination. Design assumptions that were once reconciled between agencies after a first submission, for example loads that affect fire compartmentation or foundations that affect a vehicular access, now need to be consistent from the outset. The URA has also noted that, since 1 October 2025, projects with a gross floor area of 30,000 m² and above must use CORENET X, as stated in its landed house guidance.

A practical sequence for a Eurocode-compliant submission

Confirm the approval pathway. Determine which agencies are involved (BCA, URA, SCDF, JTC, PUB, LTA, NEA, NParks) and whether any exemption or lodgment route applies. The SCDF advises applicants who cannot tell whether full plan approval is required to consult it before works start.
Appoint the QP early. The QP should be engaged before the design concept is fixed, not after the contractor is selected.
Define the design basis. Record the SS EN parts, the National Annexes and the editions used. State the exposure classes, design working life and load assumptions.
Complete the ground investigation. Establish geotechnical parameters in accordance with EC7 and the BCA guidelines.
Run an independent design check where useful. A non-authority design check before submission can identify inconsistencies early. See our overview of civil and structural design checks.
Submit through the required portal and track queries. Our guide on how to submit BCA plans without delays covers preparation of the package.
Close out the process. Progress from approval through to the Temporary Occupation Permit and Certificate of Statutory Compliance, as outlined in our BP to TOP guide.

Our perspective

In our experience coordinating structural and authority submissions in Singapore, the Eurocodes themselves are rarely the cause of delay. Delay arises from the gaps between documents: a calculation set that cites a Eurocode without its National Annex, a geotechnical report that does not match the parameters used in the foundation design, or a structural scheme that has not been reconciled with the fire and planning submissions.

For that reason we treat the design basis report as the controlling document of a project. It states the standards, annexes, editions and assumptions once, and every drawing and calculation refers back to it. We also recommend that owners and developers involve the structural and geotechnical engineer at the concept stage, because decisions about spans, transfer structures, mezzanines and basements determine most of the later approval effort.

Our practice is led by a Professional Engineer with long experience in Singapore infrastructure, and our team handles structural, geotechnical, architectural and M&E design alongside submissions to the full range of statutory boards. That integration is intended to keep the Eurocode design, the planning parameters and the fire requirements aligned within one coordinated set of documents.

— Aman

Support for Eurocode-based design and submissions

Stellar Structures provides civil and structural engineering consultation, geotechnical design, non-authority structural design checks, and submissions to BCA, URA, JTC, HDB, SCDF, PUB, LTA, NEA and NParks. Owners, developers, contractors and architects can review the full list on our services page. For existing buildings, we also offer BCA Periodic Structural Inspection and Periodic Façade Inspection. Fees are quoted per engagement, as no standard prices are published.

FAQ

Are Eurocodes mandatory in Singapore?

For structural design submitted to the BCA, the Eurocodes with their Singapore National Annexes are the accepted standard set out in the Approved Document. The co-existence period with the British-based standards has ended. Designs that depart from the Acceptable Solutions must be justified as Alternative Solutions.

Do I need the Singapore National Annex as well as the SS EN standard?

Yes. Any reference to a Eurocode in the Approved Document includes the relevant Singapore National Annex. Where no Singapore National Annex exists for a part, the UK National Annex is the reference.

Can a design combine Eurocodes and British Standards?

Not inappropriately. The Approved Document states that mixing the two within the same building design is unacceptable. A single, consistent design framework should be chosen and documented in the design basis.

Who can submit a structural plan for approval?

Only a Qualified Person who is a registered Professional Engineer in the civil or structural discipline can apply for structural plan approval. A contractor or owner cannot substitute for the QP.

Does Eurocode compliance replace SCDF or JTC approval?

No. Structural plan approval, SCDF fire plan approval and JTC landowner consent are separate requirements, and each must be obtained where it applies before works begin.

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Eurocodes in Singapore: What Structural Design Submissions Require