Singapore HDB Renovation Guide: What You Can Hack
This HDB Renovation Guide Singapore clears up what you can and cannot hack in your flat under 2025 and 2026 rules. The takeaway: you can remove most non-structural walls with a permit, but touch a beam or column and you're looking at a S$5,000 fine. Know the line before you start.
What you can hack
Hacking means tearing down walls and surfaces to change your layout. HDB allows some of it. You can hack non-structural walls once you have an HDB renovation permit, and you can change floor or wall tiles in toilets if your flat is past its restriction window. Those works need the proper approval.
What is flat-out banned? Hacking structural walls, beams, or columns. Removing the RC ledge that holds your aircon. Relocating a toilet or kitchen. Changing the external façade. And loading your floor beyond 150kg per square metre. That last one catches people who pile on heavy tiles and stone.
The 150kg per sqm rule is real. It is why solid granite slabs and thick screed get flagged. If your dream floor is heavy, your designer should check the load, not guess at it.
Structural vs non-structural walls
How do you tell them apart? Non-structural walls are usually thinner partition walls, often brick or light material, that don't carry the building. Structural walls are thicker, often reinforced concrete, and they hold the slab above. Don't trust a knock test alone. This is the part of any HDB Renovation Guide Singapore owners should read twice, because guessing wrong here is the expensive mistake.
This is where a Professional Engineer registered with PEB comes in. For anything touching structure, the PE checks the drawings and certifies the work is safe. I've seen owners assume a wall is free to go, only to find it carries the neighbour's beam. The PE check stops that disaster.
The rule is simple. If you're unsure, treat the wall as structural until an engineer says otherwise. Hacking it without that sign-off is how you land the S$5,000 fine plus a forced rebuild.
The 3-year BTO toilet rule
New BTO toilets come with a catch. For the first three years, you cannot hack the wall or floor tiles. The flat is under HDB's defect liability period, and the builder needs that surface intact to fix leaks or cracks.
What you can do is overlay. You lay new tiles or a thin topping over the old ones without breaking them. That keeps your warranty clean and still refreshes the look. After three years, full hacking opens up.
The reason is practical, not picky. Toilet leaks are the most common defect in new flats, and HDB needs to find them fast. If everyone hacked on day one, a small leak would hide behind new tiles and rot the slab. The three-year wait protects you and the block.
Know your limits before the tools come out. Hack the non-structural stuff with a permit, leave every beam and column alone, and respect the three-year toilet rule. Get your PE and your HDB renovation permit in order, and your reno stays legal and safe.
