This guide provides general legal information only — not legal advice. For your specific situation, consult a Malaysian property lawyer or your local authority.
What counts as illegal renovation in Malaysia?
A renovation is “illegal” for one of two reasons: it was carried out without the required local-authority building plan approval, or it deviates from the approved plan in a material way. Under Section 70 of Act 133, no person shall erect any building, or carry out any alteration to a building, without prior written permission from the local authority (Source: Street, Drainage and Building Act 1974 (Act 133); DBKL Building Control Department; AskLegal.my, Certain home renovations in Malaysia may not require permits. Here’s why).
Works that generally require local-authority approval:
- Any structural extension or addition to the building footprint (e.g. extending a car porch, adding a room).
- Hacking or removing load-bearing walls or structural elements.
- Altering the building façade or roofline.
- Adding a new floor or mezzanine.
- Major plumbing or drainage diversions that affect the main lines.
- Building a new retaining wall or boundary wall.
Purely cosmetic works (repainting, replacing tiles, swapping fixtures of the same type) typically do not need council approval, though strata buildings may still require management approval.
Why illegal renovation matters to you as a neighbour
An illegal renovation by your neighbour can directly harm you in several ways:
- Structural risk — an unapproved extension or structural alteration can compromise the integrity of shared walls, floors or foundations, putting your property at risk.
- Water damage — drainage diverted without proper engineering causes flooding, seepage or waterproofing failure that flows into your unit or garden.
- Loss of light, air or privacy — an oversized or illegal extension can block your windows, reduce cross-ventilation, or overlook your living spaces.
- Reduced property value — an illegal structure next door is a material adverse fact that buyers’ valuers and conveyancing lawyers will note.
- Fire risk — structures that do not comply with fire separation requirements of UBBL 1984 create a heightened fire-spread risk to your property.
Legal framework
| Legislation | Provision | What it says |
|---|
| Act 133 — Street, Drainage & Building Act 1974 | Section 70 | No building shall be erected or materially altered without prior written permission of the local authority. Offence: fine up to RM10,000 and/or imprisonment up to 2 years; continuing fine RM1,000/day after conviction |
| Act 133 | Section 72 | Local authority may issue stop-work notice; may demolish and recover cost from owner |
| UBBL 1984 | By-laws 86, 98 | Party wall and boundary wall construction standards |
| SMA 2013 (Act 757) | Section 32; Regs 2015 By-law 27 | Strata: prior written management approval required before renovating; by-laws bind all owners and occupiers |
| Civil Law Act 1956 + common law | Trespass, nuisance, negligence | Civil remedies for damage or loss caused by illegal renovation |
Local-authority enforcement powers
Once you report an illegal renovation to the Jabatan Kawalan Bangunan (Building Control Department) of your local authority (e.g. DBKL, MBPJ, MPAJ, MBSJ, MPK), the council has statutory powers to (Source: DBKL; AskLegal.my, Certain home renovations in Malaysia may not require permits; conzlab.com, Complete Guide to Renovation Permits in Malaysia):
- Inspect the property to verify whether a valid building plan approval was obtained.
- Issue a stop-work notice (Notis Perintah Berhenti Kerja) immediately halting all works on site.
- Issue a show-cause notice requiring the owner to explain and regularise the works, or face demolition.
- Order demolition of the unauthorised structure if it cannot be regularised. If the owner fails to demolish within the specified time, the council may demolish and bill the owner.
- Institute criminal prosecution for the Section 70 offence.
Penalties for illegal renovation under Act 133
| Penalty | Details | Source |
|---|
| Fine | Up to RM10,000 per offence | Act 133 s.70(13)–(14) |
| Imprisonment | Up to 2 years | Act 133 s.70 |
| Continuing daily fine | Up to RM1,000/day after conviction while offence continues | Act 133 s.70 |
| Compounding fee | Typically 10x–20x the permit fee to compound the offence in lieu of prosecution | Local authority discretion |
| Demolition order | Unauthorised structure to be demolished at owner’s cost | Act 133 s.72 |
| Strata fines (additional) | COB can impose fines under SMA 2013 for by-law breaches | SMA 2013 |
Extra layer: strata buildings
If the illegal renovation is in a strata building (condo, apartment, serviced residence), an additional set of rules applies on top of Act 133 (Source: SMA 2013; KPKT COB guidelines; HHQ Law Firm, What Do You Need to Know Before Renovating Your Stratified Home):
- Management approval (By-law 27) — the owner must obtain prior written approval from the JMB/MC before starting any renovation. This is separate from, and in addition to, the local-authority requirement.
- Renovation deposit — most strata buildings require a deposit that can be forfeited if works cause damage or breach by-laws.
- COB enforcement — the Commissioner of Buildings attached to your local council can direct management to enforce the by-laws, direct the offending owner to reinstate, or take direct action.
- Strata Management Tribunal — if the illegal renovation causes you damage, you can file a compensation claim at the Tribunal (up to RM250,000) against the owner.
How to report an illegal renovation to the local authority
- Identify your local authority: DBKL (KL), MBPJ (Petaling Jaya), MPAJ (Ampang Jaya), MBSJ (Subang Jaya), MPKJ (Klang), MPS (Shah Alam), MPSJ (Subang Jaya/USJ).
- Go to or contact the Jabatan Kawalan Bangunan of your local council — most councils accept complaints online, by email, by letter, or in person at the counter.
- Provide: (a) the address of the property; (b) a description of the works being done; (c) your photographs/video; (d) your contact details.
- Ask for a written acknowledgment of your complaint and a case reference number.
- Follow up by phone or email after 7–14 days if you have not received a response.
Renovation types: which need approval?
| Renovation work | LA approval (Act 133)? | Strata management approval? |
|---|
| Interior repainting | No | Usually no (check by-laws) |
| Replacing floor tiles (same level) | No | Usually no |
| Installing new kitchen cabinets | No | Notify management recommended |
| Hacking non-structural internal walls | Yes (plan submission) | Yes |
| Hacking structural / party walls | Yes (PE endorsement required) | Yes; also COB notification |
| Building a room extension / car porch | Yes (full plan approval) | Not applicable for landed; strata: usually not permitted |
| Raising boundary wall height | Yes (UBBL By-law 98) | Not applicable for landed |
| Major plumbing diversion | Yes (plan submission) | Yes (strata) |
What if the local authority does not act?
If you have filed a complaint and the local authority has not acted within a reasonable time (typically 2–4 weeks for an initial response), you can:
- Escalate within the council — write to the Datuk Bandar (city mayor), ADUN, or MP with a copy of your initial complaint and the council’s inaction. This often accelerates enforcement.
- File a complaint with the KPKT — the Ministry of Housing and Local Government (KPKT) oversees all local authorities and accepts public complaints via its Aduan KPKT system.
- Seek a judicial review — if the council refuses to act in the face of a clear offence, you can apply to the High Court for judicial review of the council’s inaction. This requires a lawyer.
- Pursue civil remedies independently (see below).
Civil remedies for affected neighbours
Independently of the criminal enforcement route, you have civil law remedies if the illegal renovation is causing or threatening harm to you (Source: hajimohamadzainuddin.com, Nuisance and Trespass in Malaysia):
- Private nuisance — claim in court for an injunction to stop the works and/or damages for loss or harm caused.
- Trespass — if the structure physically encroaches onto your land.
- Negligence — if the illegal works were conducted carelessly and caused you damage (e.g. drainage failure flooding your property).
- Strata Management Tribunal (strata) — if the works are in a strata building and caused you actual damage, claim compensation up to RM250,000 via strata.my.
For damage caused specifically to a shared or structural wall, see Unauthorised Structural Hacking →. For damage to your unit from a neighbour’s renovation, see Neighbour’s Renovation Damaged Your Unit →.
Step-by-step action plan
- Step 1 — Document the works. Photograph what is being built, from what angles are visible from your property. Keep dated records of when works started and what happened each day.
- Step 2 — Check if they have a permit. You can ask the local authority to confirm whether a valid building plan approval exists for the works at that address. This is public information under Act 133.
- Step 3 — Report to your JMB/MC (strata). If a strata building, report to management in writing immediately and request they invoke their stop-works power under the by-laws.
- Step 4 — Lodge a formal complaint with the Jabatan Kawalan Bangunan of your local council. Attach photographs, your address, and the offending property address.
- Step 5 — Follow up in writing if the council does not respond within 2 weeks. Copy your ADUN or KPKT if necessary.
- Step 6 — Engage a property lawyer for a civil injunction if the works are ongoing, causing structural risk, and the council is too slow to issue a stop-work notice.
Sources & official references