Periodic structural inspection vs periodic facade inspection comes down to what each regime protects. Under the Building Control Act, PSI checks a building’s load-bearing structure every 5 or 10 years, while PFI checks external facade elements every seven years once a building passes 20 years and 13 metres. BCA issued a circular on PSI conduct in March 2026. This blog walks you through both and facade inspection compliance support.
What is the difference between periodic structural inspection and periodic facade inspection?
PSI asks whether the building can still carry its loads safely. PFI asks whether anything on the outside of the building can fall on people below. Separate qualifications, cycles and reports follow from that split.
| Factor | Periodic Structural Inspection (PSI) | Periodic Facade Inspection (PFI) |
| Purpose | Structural stability and integrity | Prevent facade collapse and falling elements |
| Started | 1989, with the Building Control Act | 1 January 2022 |
| Buildings covered | All except landed homes used solely as residences and temporary buildings; no height limit | Same exclusions, plus only buildings over 13 metres and more than 20 years old |
| Frequency | Every 5 years (non-residential) or 10 years (residential) | Every 7 years |
| Cycle anchor | First TOP or CSC, whichever was earlier | Last whole-building TOP, then the year of the last notice |
| Who inspects | Structural engineer: PE (civil or structural) | Competent Person: PE or Registered Architect with the Certificate in Façade Inspection, assisted by facade inspectors |
| Scope | Structural elements, loading, unauthorised works | Exterior, attached features and parts on or near the exterior |
| Method | Personal visual survey, minimum sampling of units and concealed elements | 100% visual survey plus close-range inspection of 10% of each elevation |
| Appointment deadline | 2 months after notice (Regulation 3) | 2 months after notice (Regulation 12) |
BCA’s PFI FAQ puts the distinction in materials. PSI covers columns, beams and flat slabs, while facades are mostly non-structural elements such as plaster, tiles, bricks and glass.
Why does Singapore run two separate inspection regimes?
Each regime answers a different failure. PSI arrived in 1989 in response to structural collapse. PFI arrived in 2022 in response to facade elements falling off ageing buildings.
The Hotel New World collapse on 15 March 1986 killed 33 people, according to NLB’s Infopedia. Parliament passed the Building Control Act on 16 February 1989, and BCA’s PSI Guidelines confirm periodic structural inspection began with that Act. Opening a structural failures conference on 20 March 1989, Minister of State Peter Sung described the Act’s aim as ensuring “buildings are safe, and remain safe throughout its service life”. He announced structural inspections every 10 years for residential and every 5 years for commercial buildings.
Three decades later the risk had shifted. Minister of State Zaqy Mohamad told Parliament on 6 March 2020 that BCA was receiving almost 30 reports of falling facade elements a year, mostly linked to “wear and tear of the facade materials or connections.” PSI was never designed to catch loose tiles, cladding brackets or a cracked cornice, so the PFI regime was added alongside it.
Worth noting: BCA refuses to let one regime stand in for the other. Its PFI FAQ says a building that has just completed PSI still needs PFI, because the scopes differ.
Which buildings need PSI, PFI or both?
Almost every non-landed building needs PSI. Only buildings taller than 13 metres and more than 20 years old need PFI as well. A building that meets both tests carries two separate obligations.
Section 27 of the Building Control Act excludes detached, semi-detached, terraced and linked houses used solely as residences, and temporary buildings, from both regimes. PSI stops there. It has no height threshold, so a three-storey shophouse office, a single-storey factory and a 40-storey condominium all fall under it.
PFI then narrows the field. Section 27(3) removes any building whose highest point is 13 metres or lower, and the regime only reaches buildings more than 20 years old. BCA expected about 30,000 buildings to need facade inspection in the first seven-year cycle.
PSI has also widened. BCA’s September 2024 owner’s guide says PSI notices for jetties, docks and wharves began in December 2024, and notices for bridges, underpasses and floating structures began in March 2025, each on a 5-year cycle.
For strata developments, the MCST acts as owner under both regimes. Where a building with 2 or more flats is not subdivided, section 28(4) requires the owners to jointly appoint one structural engineer for PSI and one Competent Person for PFI.
How often is each inspection due, and how are the cycles counted?
PSI repeats every 5 years for non-residential buildings and every 10 years for residential buildings, counted from the first TOP or CSC. PFI repeats every seven years once the building is more than 20 years past its last whole-building TOP.
The anchor dates are where schedules go wrong. Section 28 of the Building Control Act lets BCA serve a PSI notice after the 5th year (non-residential) or 10th year (residential) from the earlier of the first TOP or first CSC. Later notices follow at intervals of not less than 5 or 10 years from the last notice. PFI counts age from the last TOP for the whole building, and the next PFI notice can come in the seventh or later year after the year of the previous notice.
Mixed-use developments deserve a check. The 5-year PSI cycle applies to any building “used other than solely for residential purposes”, so a condominium with a commercial podium in the same building falls on the shorter cycle.
Here is how the earliest possible notice years line up for two buildings with a whole-building TOP in 2004, assuming BCA serves each notice as soon as the Act allows.
| Building (TOP 2004) | Earliest PSI notices | Earliest PFI notices |
| Office tower | 2009, 2014, 2019, 2024, 2029, 2034 | 2024, 2031, 2038 |
| Condominium | 2014, 2024, 2034 | 2024, 2031, 2038 |
Both buildings can face two notices in 2024. The office tower then carries a PSI or PFI obligation in 2029, 2031, 2034 and 2038.
Commercial owners feel this most. A 5-year PSI cycle means structural engineers look for corrosion from leaking roofs and wet areas far more often, so budgets for waterproofing commercial buildings belong in the same plan as both inspections.
Who can carry out PSI versus PFI?
PSI needs a structural engineer: a Professional Engineer in the civil or structural discipline with a practising certificate. PFI needs a Competent Person: a PE or a Registered Architect who has passed the Certificate in Façade Inspection.
That creates two gaps owners should check. A Registered Architect with the facade certificate can run a PFI but cannot sign a PSI. A PE (civil or structural) without the certificate can run a PSI but cannot act as Competent Person for PFI.
The regimes also differ on delegation. PFI lets a Competent Person use accredited facade inspectors under direct supervision. PSI does not. Regulation 6(2) requires the structural engineer’s visual survey to be carried out personally, and BCA’s circular of 2 March 2026 went further, stating the structural engineer must be physically present during inspection.
That circular named practices BCA found unacceptable: engineers delegating inspections entirely to staff or third parties, photographs from earlier PSI cycles passed off as new, and inspection coverage below the guideline minimums. BCA stated it will take enforcement action against errant engineers.
Independence applies to both. BCA’s PSI FAQ bars a PE who designed or built any part of the building, and PFI adds regulation 16A, which since 1 October 2025 bars facade inspectors employed by the owner, the builder or anyone doing facade works.
What does each inspection actually look at?
PSI examines the whole structural system: the condition of structural elements, the loads the building carries, and any structural works done without approved plans. PFI examines the building’s exterior and everything attached to it.
BCA’s PSI Guidelines for Structural Engineers set minimum coverage where 100% access is impossible. In residential developments, the engineer must enter at least 20% of units, or 30% in buildings over 30 years old, including every rooftop unit and at least one unit per storey. At least 30% of cladded columns must be exposed. In commercial and industrial buildings, at least one suspended ceiling must be opened for every 500 m² of indoor area and every 250 m² outdoors.
Loading is a PSI issue that PFI never touches. BCA’s March 2026 circular singles out changes of use, such as shophouses converted from residential to commercial, and expects owners of non-residential buildings to display a floor diagram of design loads on every storey.
PFI works on a different sampling logic. The Competent Person surveys 100% of the facade visually and carries out close-range tactile checks, such as tapping plaster and tiles, on at least 10% of each elevation. Its scope list runs from windows, cladding and signboards to air-conditioner brackets and clothes drying racks.
In practice, the PSI engineer spends most of the time inside the building, and the PFI team spends most of it outside.
Where do PSI and PFI overlap on the same building?
They overlap on the building’s exterior concrete. BCA’s PFI Guidelines list any part of a concrete wall, slab, beam or column as a facade element, while the PSI Guidelines treat cantilever balconies exposed to the weather as structures without redundancies, which must be visually inspected even where coverage is reduced.
A spalling cantilevered balcony edge on a 25-year-old condominium can therefore appear in both reports. The structural engineer assesses whether corroded reinforcement threatens the cantilever. The Competent Person assesses whether loose concrete can fall on the driveway below. Both conclusions are correct, and they lead to the same repair.
PSI also reaches into facade territory on its own terms. The PSI Guidelines ask structural engineers who notice architectural or M&E finishes at risk of collapse to tell the owner as soon as possible and record it in the report.
The cleaner approach is one repair scope built from both reports. Corroded reinforcement in load-bearing elements calls for structural repair works under a PE’s design, with plan approval and a permit where applicable. Non-structural spalling on ledges and parapets calls for spalled concrete repair and protective coating. Running them as one mobilisation saves a second round of access equipment on the same elevation.
Proof-Tech is a BCA-registered contractor with specialist workheads CR05 Concrete Repairs, CR09 Repairs and Redecoration, and CR13 Waterproofing Installation, which covers most remedial items arising from either report.
Can one engineer handle both inspections and submit one report?
One engineer can handle both, but the reports stay separate. BCA’s PFI FAQ allows owners who receive PSI and PFI notices at the same time to appoint the same PE (civil or structural), provided that engineer qualifies for both.
Qualifying for both means holding a practising certificate as a civil or structural PE and the Certificate in Façade Inspection. The engineer must still submit two reports, because the scopes and regulations differ. BCA’s FAQ adds one condition: it accepts the combined arrangement only when the PSI and PFI notices were served concurrently.
The paperwork runs in parallel. PSI uses BCA Form D2 for the structural engineer’s appointment, while PFI uses the PFI_F1 appointment form. Both regimes give owners 2 months from the notice to appoint, and both require notice of the appointment to BCA no later than the 7th day after that 2-month window closes. The fines match too: up to $20,000 for failing to appoint and up to $10,000 for failing to notify BCA.
Our position: combine the site visits and the access equipment, never the conclusions. A PE doing both should keep structural findings and facade classifications distinct, because BCA vets each report against its own regulations.
What happens after the reports, and how do you handle overlapping repair deadlines?
After BCA accepts each report, it writes to the owner with the period for completing recommended works. Section 28(7) of the Building Control Act binds the owner to carry out those works for both regimes, and section 28(9) sets fines of up to $20,000, up to 12 months’ imprisonment, or both, for failing to do so.
The certification paths differ. PSI remedial works are supervised and certified by the structural engineer using BCA’s certification forms, including Form D7 for supervision of remedial works. PFI uses a Completion of Remedial Works Report template signed by the Competent Person.
Where deadlines overlap, sequence the work by risk and by trade. Structural repairs to cantilevers and beams go first, because facade finishes applied over unrepaired concrete fail again. Facade items classified “Unsafe” need immediate protective measures regardless of order, such as removing loose elements and cordoning the area below. If the two repair periods cannot both be met, write to BCA with a combined programme before the first deadline passes; BCA reviews extension requests case by case.
Most corrosion both reports find starts with water. Condominium councils that fund stopping water ingress early through roof and external wall waterproofing reduce what the next PSI and PFI will find. A written plan of planned maintenance for Singapore buildings makes the 5, 7 and 10-year cycles a budget line rather than a surprise.
Conclusion
PSI and PFI share a statute, a notice format and the same fines, yet they answer separate questions. The structural engineer judges whether the structure can carry its loads; the Competent Person judges whether the exterior can stay attached. The two cycles also run from different dates. Plan both schedules from your TOP records, share access and repair mobilisations, and keep the reports separate.
Send Proof-Tech your latest PSI and PFI reports for a single remedial works programme and quotation covering structural repair, concrete repair and waterproofing, sequenced to meet both BCA deadlines.
Frequently asked questions
Do landed houses need PSI or PFI?
No. Section 27 of the Building Control Act excludes detached, semi-detached, terraced and linked houses used solely as residences from both periodic structural inspection and periodic facade inspection. A landed house used as an office or childcare centre loses that exclusion for PSI, which has no height threshold, and PFI then turns on whether it exceeds 13 metres.
Can a periodic structural inspection be postponed because of renovation works?
Not for renovation that is recent or ongoing. BCA’s PSI owner’s guide states addition and alteration works do not involve the independent structural inspection and report required under section 28 of the Building Control Act. BCA considers postponement requests case by case only where extensive addition and alteration works are planned for the near future.
What is the fine for not doing a structural inspection in Singapore?
Up to $20,000. An owner who fails to comply with a PSI notice under section 28(8) of the Building Control Act, or fails to appoint a structural engineer within 2 months under Regulation 3, faces that maximum. Failing to carry out recommended works adds possible imprisonment of up to 12 months and daily fines.
