How much does interior design cost in Penang? A 2026 price guide

Price is the first question almost every homeowner asks, and the one the industry is strangely reluctant to answer in public. This guide gives real numbers for Penang as of 2026, what sits inside them, and where they typically go wrong.

The two fee models you will be quoted

Interior designers in Malaysia charge in one of two ways, and the difference matters more than the headline number.

Percentage of construction cost. The designer takes 8–15% of what the build actually costs. Common on larger projects. It is transparent, but it does create an awkward incentive: a more expensive build pays the designer more. Ask whether the percentage is capped.

Flat fee per square foot. Typically RM 8–20 per square foot of designed area in Penang, depending on the depth of documentation. This is our own preference because the fee is fixed before anyone knows what the marble costs, which removes the incentive problem entirely.

A third model, design-and-build, folds the fee into the construction price. It is convenient and often cheaper on paper, but the design fee becomes invisible, which makes it impossible to tell whether you are paying for design or for margin. If you take this route, ask for the fee to be shown as a separate line even though it sits inside one contract. Our renovation and build service itemises it this way as standard.

What a renovation actually costs per square foot

These are all-in construction figures — materials, labour, and contractor margin — excluding professional fees and loose furniture. They reflect quotations we have seen across Penang island and Seberang Perai in the past eighteen months.

A 1,000 sq ft apartment done to a comfortable mid-range standard therefore sits somewhere between RM 140,000 and RM 200,000, before furniture. If a quotation comes in dramatically under that band, something has been left out of the scope — and it is almost always the electrical rewiring or the waterproofing.

Shophouses are expensive for reasons that have nothing to do with luxury. Lime plaster costs more than cement render and takes longer to cure, structural timber has to be sourced and treated, and heritage submissions add weeks of professional time. We explain what the rules actually require in renovating a Penang shophouse.

Where the money goes

For a typical residential project, the split looks roughly like this:

• Carpentry and joinery — 35–45%. Kitchen, wardrobes, TV console, feature walls. Always the largest line, and the one where specification differences are least visible in a quotation.
• Wet works, tiling and waterproofing — 15–20%. Bathrooms, kitchen floors, any hacking or rebuilding of walls.
• Electrical and lighting — 10–15%. More if you are rewiring an older property, which you almost certainly should be.
• Painting and finishes — 8–12%.
• Air conditioning — 6–10%.
• Ceiling and plaster — 5–8%.

Because carpentry dominates, that is where quotations diverge most. Two contractors can quote RM 48,000 and RM 71,000 for the same drawings, and the difference will be marine ply versus chipboard carcasses, Blum versus unbranded hinges, and solid versus hollow-core doors. In Penang humidity that difference is not cosmetic — see materials that survive the Malaysian climate for what actually fails and when.

Six line items that blow budgets

1. Electrical rewiring in older properties. A pre-2000 house frequently needs a new distribution board and full rewire. RM 12,000–25,000, and it is not optional.
2. Hacking and disposal. Debris removal is charged by the lorry load. Penang island disposal fees have risen sharply; budget RM 350–600 per load.
3. Waterproofing failures. Redoing a bathroom that leaks into the unit below costs four times what doing it properly costs the first time.
4. Management corporation deposits. Most Penang condominiums require a renovation deposit of RM 1,000–5,000, plus permit fees and restricted working hours that lengthen the programme.
5. Stone. Natural marble and quartzite are priced per slab, and the slab you fall in love with is rarely the one in the quotation.
6. Variation orders. Every change after drawings are signed is charged, and the rate is always higher mid-project than it would have been at tender.

The contingency question

Budget 10% contingency on a new-build or developer-finished unit, and 15% on anything built before 2000 or inside the heritage zone. This is not padding. Old buildings hide their problems until the first wall opens, and a project without contingency stops dead the day something is discovered.

If adding contingency makes the project unaffordable, the honest conclusion is that the scope is too big — not that the contingency should go. Reduce the scope instead, and phase the rest. A staged renovation that finishes is worth more than a complete one that stalls at 70%.

Getting a number for your own property

Costs per square foot are useful for orientation and useless for decision-making, because they cannot see your ceiling height, your existing wiring, or the fact that your building only allows hacking on weekdays. The only reliable number comes from a survey.

That is what our estimate appointment is for: a walk-through of the property, a conversation about what you actually want, and a written budget band with the assumptions listed. If the number does not work for you, you will have learned that in a fortnight rather than three months in.