Illegal Extension Enforcement
in Malaysia: Council Action & How to Regularise

This guide is general information only and is not legal advice. Consult a registered architect, professional engineer, or Malaysian solicitor for your specific situation. WhatsApp ClickBina if you need a contractor who handles council submissions and regularisations.

What makes an extension ‘illegal’?

An extension is considered illegal — more precisely, unauthorised — when it was built without obtaining the required local-council approval beforehand. In Malaysia, any addition to the approved footprint of a building is a “building work” under Act 133 and requires written approval from the local authority (Majlis Perbandaran / Pihak Berkuasa Tempatan) before a single post goes into the ground.

Common examples include:

• Rear extensions (adding a room, extending the kitchen, building a utility area)
• Side extensions encroaching on the side setback
• First- or second-floor additions built without plan approval
• Rooftop structures (pergolas attached to the building, permanent covered terraces)
• Converting an open car-porch into an enclosed room
• Annexes or outbuildings connected to the main structure

A structure that was previously approved but has been modified beyond the approved plans is also treated as unauthorised for the portion that deviates.

The legal framework: Act 133 and UBBL 1984

Street, Drainage and Building Act 1974 (Act 133) is the primary statute. Key provisions:

• Section 70 — prohibits erecting or altering any building without prior local-authority approval.
• Section 71 — creates the criminal offence and sets penalties (fine up to RM10,000 and/or imprisonment up to 2 years; continuing offence additional RM1,000/day after conviction).
• Section 71A and 71B — offences for selling or agreeing to sell a building constructed in breach of s.70.
• Section 72 — empowers the local authority to serve a notice requiring the owner to demolish or remove any building erected in contravention of s.70. If the owner does not comply, the council can demolish at the owner’s cost.

The Uniform Building By-Laws 1984 (UBBL), made under Act 133, sets the technical standards that all building work must meet — setbacks, floor-area ratio, structural requirements, ventilation, and so on. An extension that meets UBBL requirements can potentially be regularised; one that violates UBBL (e.g., built too close to a boundary or over a drainage easement) generally cannot.

What approvals does a legal extension need?

A lawfully-built extension goes through the following approval chain:

Skipping any of these steps — even step 1 alone — makes the extension unauthorised. Many homeowners complete the extension first and assume they can apply for approval later. This “build first, regularise later” approach is possible in some cases (see below) but is not guaranteed, and carries significant legal risk in the interim.

How councils detect and act on illegal extensions

Local councils in Malaysia have a number of mechanisms for detecting unauthorised extensions:

• Neighbour complaints. The most common trigger. Councils are required to investigate formal complaints. If your neighbour lodges a complaint via the council’s app or hotline, an inspection will follow typically within 14–30 days.
• Routine inspections and drives. Councils periodically conduct area-wide enforcement drives, especially in older residential areas known for encroachments. Major Malaysian councils (DBKL, MBPJ, MPSJ, MBSA) run regularisation programmes and enforcement campaigns. In 2016, MPSJ ran a programme allowing homeowners to retrospectively regularise extensions within a specified period.
• Satellite / aerial imagery updates. Councils increasingly use updated aerial imagery to compare current structures with their approved plan records.
• Property transactions. When a property is sold and surveyed, the surveyor’s report may flag structures not reflected in the original approved plans, leading to a council query.

Types of council notices you may receive

Penalties and enforcement powers under Act 133

The Act gives councils significant enforcement muscle:

• Fine up to RM10,000 and/or imprisonment up to 2 years for erecting without approval (s.71).
• Continuing offence fine of up to RM1,000 per day after the initial conviction (s.71 continuing offence provision).
• Demolition notice (s.72) — the council can serve a notice requiring you to demolish the unauthorised structure. If you do not comply within the stated period, the council demolishes at your cost, and that cost becomes a charge on the land title.
• Restriction on title transfer — a charge registered by the council can prevent sale or refinancing of the property until resolved.

In practice, councils often offer a compound to resolve the penal offence first, then deal with the physical structure separately. Paying a compound does not regularise the extension — it only settles the criminal element.

Can your extension be regularised?

Whether an unauthorised extension can be regularised depends on whether the completed structure can be brought into compliance with planning and building rules. Regularisation is generally possible if:

• The extension does not encroach on the required setbacks from the boundary (typically 1.5–3 m depending on zoning).
• The extension does not sit over or block a drainage reserve, road reserve or easement.
• The total floor area (GFA) including the extension is within the permitted plot ratio for the lot.
• The extension is structurally sound and can be certified by a PE.
• The extension meets fire, ventilation and natural lighting requirements of UBBL.

Regularisation is generally not possible if:

• The structure encroaches on a drainage easement, road reserve or shared drain.
• The structure crosses the lot boundary (built on a neighbour’s land or a public reserve).
• The total GFA after inclusion of the extension exceeds the permitted plot ratio.
• The structure is structurally unsound and a PE will not certify it.

Step-by-step regularisation process

1. Engage a registered architect. The architect will do a site survey, prepare as-built drawings of the existing extension, and advise whether it can meet local planning and UBBL requirements.
2. Engage a Professional Engineer (PE) for structural elements. If the extension has a roof, columns, beams or any structural component, a PE must inspect it and certify its structural adequacy. This is mandatory — the council will not accept a regularisation submission without it for structural works.
3. Planning check. The architect checks the local draft plan (Rancangan Tempatan Daerah) to confirm the extension is permissible in terms of land use, plot ratio and setbacks for that parcel.
4. Submit to local council OSC (One-Stop-Centre). The as-built drawings, PE structural report, completed application forms and processing fees are submitted to the council. Different councils have different processes for retrospective / as-built submissions; some have formal regularisation programmes.
5. Council inspection. A council inspector visits the site to compare the as-built structure against the submitted drawings and check compliance.
6. Approval and CCC. If satisfied, the council approves the amended plans. The architect or PE then issues a Certificate of Completion and Compliance (CCC) or the council issues its own approval letter for the extension.

Costs of regularisation vs demolition

Regularisation is almost always the better financial outcome — if it is possible. The critical decision is to engage an architect before the council escalates to a demolition notice, while you still have time and options.

Selling a property with an illegal extension

An unauthorised extension creates specific problems in a sale transaction:

• Solicitor’s due diligence. A buyer’s solicitor will run a search and inspect the property. Any structure not matching the approved plans will be flagged. Most buyers’ banks require the property to be free of enforcement notices before releasing a loan.
• Bank valuation. Valuers will flag unauthorised structures. The bank may refuse to lend or reduce the loan amount.
• Seller’s criminal liability. Under Act 133 s.71A, selling or agreeing to sell a building erected in breach of s.70 is a criminal offence — fine up to RM10,000 and/or imprisonment up to 2 years.
• Price negotiation. Even if a cash buyer proceeds, they will typically require a significant price reduction to account for the cost and risk of regularisation or demolition.

The practical advice: regularise the extension before listing the property, or — if that is not possible — obtain a written legal opinion on your disclosure obligations and fully disclose to the buyer’s solicitor.

Approved vs illegal extension: risk comparison

Need help navigating a council submission or regularisation? WhatsApp ClickBina →

Related guides: renovation without a permit →, house extension cost →, CIDB contractor registration →.

Sources & official references

• Street, Drainage and Building Act 1974 (Act 133) — CommonLII full text
• Uniform Building By-Laws 1984 — KPKT official PDF
• Legno: Illegal Extensions in Malaysia — CIDB & Enforcement overview
• AskLegal: Renovations Without Permit in Malaysia
• Houz.com.my: House Extension Approval Malaysia