Regularise unauthorised works before BCA finds them.
Unauthorised mezzanine. Illegal extension. A loft your contractor swore was "no problem". CVC Engineers turns those into BCA-approved retrospective submissions. Most cases come to us when another firm declined the work — that's our normal scope, not the exception.
Get a regularisation quoteWhat regularisation actually fixes.
Retrospective BCA approval — making works that were carried out without the right approval into works that have the right approval. The structure stays; the paperwork catches up.
Under the Building Control Act, Section 5, no person may carry out building works in Singapore without prior written approval from the Commissioner of Building Control. Section 12 makes the building owner — not just the builder — legally responsible.
Common unauthorised works we regularise:
- HDB mezzanines, lofts, attic conversions
- Landed home extensions (rear, side, basement)
- Condo alterations affecting structure or façade
- Commercial / industrial mezzanine floors
- Roof terrace conversions and pergola enclosures
- Wall removal in load-bearing structures
- F&B fit-out with structural openings
- Illegal pent-house or rooftop additions
Why owners come to CVC:
- Pre-sale clearance — buyer's lawyer flagged unauthorised works. Sale at risk.
- BCA enforcement notice — owner received a Notice of Contravention or Order to Demolish
- Renovation cascade — owner wants new A&A but architect discovers existing unauthorised works
- Insurance / mortgage refinancing — bank or insurer requires compliance proof
- Lease assignment / change of use — landlord requires regularisation before lease transfer
We've handled regularisation for HDB, landed, condo, and commercial properties across every Singapore region. Earlier you start, the lower the enforcement risk under the BC Act.
A real regularisation submission sheet.
Before / after section of an HDB unit with an unauthorised mezzanine — showing the as-built structure, the structural assessment of the unauthorised works, and the remedial reinforcement that makes the works compliant.
Regularisation cost ranges.
Indicative 2026 fees. Excludes BCA submission fee + remedial construction cost (paid to contractor separately).
| Scope | Property type | Indicative fee (SGD) | Notes |
|---|---|---|---|
| HDB mezzanine / loft regularisation | HDB flat | 3,000 – 6,000 | Single-room mezzanine, no major remedial |
| HDB rear/front extension | HDB landed (e.g. terrace) | 5,000 – 12,000 | Rare — usually denied by HDB |
| Landed home extension | Detached / semi-D / terrace | 5,000 – 15,000 | Rear extension, attic, basement |
| Landed home — multiple unauthorised works | Owner-occupied | 10,000 – 25,000 | Common pre-sale clearance scope |
| Condo unit regularisation | Strata title | 5,000 – 12,000 | Internal alterations, façade, planter box |
| Commercial mezzanine (retail / F&B) | Strata or whole shop | 8,000 – 18,000 | Often triggered by URA change-of-use |
| Industrial / warehouse mezzanine | JTC / private industrial | 10,000 – 25,000 | JTC compliance + BCA |
| BCA enforcement notice rectification | Any | +5,000 – 15,000 | Add on top of base scope. Time-critical. |
Often paired with regularisation.
Got an unauthorised works problem? Send the project.
Photos, address, and a brief description. We reply within one working day with whether regularisation is feasible and a fixed-fee scope.
Get a regularisation quote