HDB Interior Design Singapore: Hacking Rules For First-time Owners

HDB interior design Singapore first-time owners in Pasir Ris and across the island often ask what walls they can hack, and the short answer is fewer than most expect because HDB protects the structure of every flat. Knowing the rules before you sign a quote saves you from costly rework and a rejected HDB renovation permit. Start with the floor plan and let the rules shape your design.

What you cannot hack at all

Structural elements are off limits. Load-bearing walls, beams, columns, and slabs cannot be hacked under any circumstance. The bomb shelter, also called the household shelter, cannot be renovated. Only light fittings and laminated flooring are allowed inside it, and the door must stay as issued.

• Mark all load-bearing walls in red on your plan.
• Never cut a beam or column for a cleaner look.
• Leave the bomb shelter door and frame intact.
• Keep the shelter walls free of built-ins and hacking.

Your HDB Licensed Renovation Contractor checks the plan before quoting. If a design needs a structural wall removed, the answer is no, and the design must change.

What you can hack with care

Non-structural partition walls between rooms can often be hacked to open a space. This is how many HDB open concept kitchen layouts begin, by removing the wall between the kitchen and the living area. New BTO kitchens are induction-ready, and gas follows SP Group and SCDF rules, so plan the cooking setup before you hack.

1. Confirm the wall is non-structural with your contractor.
2. List the hacking in the renovation permit scope.
3. Remove the wall and make good the edges.
4. Rewire or reroute services as the new layout needs.

Lightweight non-ceramic partitions can rebuild a divider elsewhere if you later want privacy. The point is to open the flat within the law, not to fight the structure.

HDB interior design Singapore permit and noise rules

An HDB renovation permit is required before works begin, and processing takes about 2 weeks. Hacking is a noisy work, so it follows strict hours: weekdays 9am to 6pm only, with none on Sundays and public holidays. Build these limits into your BTO renovation timeline so neighbours are not disturbed and the permit stays valid.

Submit the permit through your licensed contractor with the hacking clearly drawn. The Directory of Renovation Contractors (DRC) lists firms allowed to do this work. Using a contractor outside the DRC is not permitted for HDB renovation.

Flooring and wet-area limits

Hacking often includes removing old flooring. HDB approved flooring for replacement includes vinyl and laminate, which are lighter than tile and kinder to the slab. In wet areas, keep to non-ceramic options and follow HDB's rules on what may be laid. Do not assume you can tile over the bomb shelter floor beyond the allowed laminated flooring.

A 4-room BTO of about 90 sqm and a 5-room of about 110 sqm both follow the same structural rules. The flat size changes the budget, not the limits. Market ranges put a 4-room BTO renovation around S$30,000 to S$45,000 and resale around S$50,000 to S$70,000 because of more hacking and rewiring.

Common mistakes to avoid

First-time owners sometimes ask to hack a wall that hides a service riser or a structural element. Others forget the bomb shelter door must remain. Both errors surface during the permit check and force a redraw. A clear plan agreed with a licensed contractor avoids the delay.

• Do not hack without a permit in hand.
• Do not drill on Sundays or public holidays.
• Do not enclose a balcony, which HDB does not allow.
• Do not remove required window grilles above regulated floors.

Learning the hacking rules before you renovate turns a confusing brief into a clear plan you can trust. Our whole-house customization team works only with HDB Licensed Renovation Contractors and designs within the rules from the first sketch. Reach out and we will help you open your flat safely while keeping the permit process smooth.