Planning a renovation? Knowing the correct HDB door size helps you avoid fitting problems and unnecessary expenses. In this guide, we break down the standard HDB main door, bedroom door, and toilet door sizes, explore custom door options, share where to buy quality doors in Singapore, and offer practical installation tips.
Replacing an HDB Door? Here’s the Correct Size for Each Area
Choosing the correct HDB door size is important for:
- Proper alignment and function
- Avoiding costly adjustments during installation
- Meeting HDB-approved design requirements
- Ensuring safety and accessibility
Verified Standard HDB Door Sizes & Thickness
1. Main Door (Entrance)
- Width & Height:
- Single-leaf: 3 ft × 7 ft → approximately 915 mm × 2135 mm
- Double-leaf (wider option): 4 ft × 7 ft → approximately 1220 mm × 2135 mm
- Thickness:
- Typically 45 mm for standard fire-rated main doors.

2. Bedroom Door
- Width & Height:
- Standard: 3 ft × 7 ft → approximately 915 mm × 2135 mm
- Thickness:
- Commonly 35–36 mm (some variation noted, ± 1 mm tolerance)

3. Toilet/Bathroom Door
- Width & Height:
- Standard: 3 ft × 7 ft → approximately 915 mm × 2135 mm
- Thickness:
- Around 35 mm, often designed to be moisture-resistant; commonly installed as bifold or slide & swing doors

How to Measure Your HDB Door Size Accurately
Follow these steps for accurate measurement:
- Width: Measure across the door frame from left to right.
- Height: Measure from the top frame to the floor.
- Thickness: Measure the door edge to determine if it suits your preferred lockset or design.
Always measure in millimeters (mm) for precision.
Customised HDB Door Sizes
If your frame is non-standard due to renovation changes or you want a specific design, you can opt for customised doors.
Advantages of customised doors:
- Perfect fit for irregular frames
- More design flexibility (arch shapes, glass panels, pet doors)
- Choice of unique colours, laminates, or materials
- Ability to integrate special locks (e.g., digital locks, wifi locks, fingerprint locks)
Considerations before ordering:
- Custom sizes usually cost a little more
- Process time may take 2–4 weeks
- Always measure multiple times for accuracy
Where to Buy HDB Doors in Singapore
When shopping for HDB doors, look for trusted suppliers who understand HDB regulations.
Recommended places to buy: GODIGITAL LOCK

- Specialist door suppliers – Offer both standard and customised sizes, with professional installation services
- Direct factory suppliers – Often more affordable with a wide selection
- Free installation & Free delivery
Need to know the HDB door size:
- Measure your current door openings accurately.
- Use the standard sizes as a guideline.
- Confirm whether your main door requires a fire-rated version and a permit.
- Choose appropriate materials and a locking set based on usage.
Conclusion
Understanding HDB door size before purchasing ensures a smooth renovation process and prevents costly mistakes. Whether you’re upgrading your main door for security, choosing a stylish bedroom door, or replacing a worn-out toilet door, accurate measurements are key.
For expert advice and a wide range of HDB doors in Singapore, contact us today to find the perfect fit for your home.
