HDB provides a floor plan when you book your flat. Most people glance at it, understand the room layout briefly, and move on.
That’s a mistake.
Your floor plan contains critical details that directly impact:
- Renovation decisions
- Furniture planning
- Contractor quote accuracy
The Dimensions Are Not Your Final Room Size
The measurements shown are structural dimensions — the distance between walls before any finishes.
After renovation:
- Wall plastering
- Floor tiling
- Carpentry installation
Your usable space will shrink by 3–8 cm per surface.
Why This Matters
For most rooms → minor impact
For kitchens → significant
Example:
- Plan shows: 3.2m
- Actual usable: ~3.05–3.1m
👉 Always measure on-site before finalizing cabinet layouts.
Key Measurements That Affect Renovation
Ceiling Height
- Standard: ~2.6m
- Older flats: up to 2.7–2.8m
Impacts:
- Wardrobe height (full-height vs standard)
- Cornice cost
- Air circulation
👉 Always measure after key collection.
Wet Wall Locations
These are walls with plumbing (kitchen & bathrooms).
Important:
- Cannot be hacked freely
- Require proper waterproofing restoration
- Plumbing changes depend on pipe routing
Column Positions
Shown as thick black blocks on the plan.
Impact:
- Reduce usable wall space
- Affect furniture placement
- Require custom carpentry adjustments
Example : A 20cm column can disrupt wardrobe alignment completely.
Windows
Check:
- Position
- Size
- Opening direction
Used for:
- Curtain planning
- Airflow
- Window grille decisions
👉 Always verify dimensions on-site.
The Most Misjudged Room
Master Bathroom
Typically smaller than expected:
- Around 4–5 sqm (for 4-room flats)
Critical detail:
- Toilet rough-in (distance from wall to waste outlet)
Most common:
- 300mm
If ignored:
- Toilet may not fit
- Requires costly pipe relocation
Understanding Room Labels
Labels like:
- Bedroom 1
- Bedroom 2
- Common Bathroom
Are guidelines, not rules.
You can repurpose rooms:
- Bedroom → Study
- Nook → Walk-in wardrobe
🚫 What you cannot change:
- Structural walls
- Official flat classification
- Number of bedrooms (for resale rules)
How to Use Your Floor Plan Properly
Before meeting any ID or contractor:
Step 1: Mark Constraints
- Columns
- Wet walls
- Service ducts
- Bomb shelter
👉 These cannot be changed.
Step 2: Define Your Needs
- Bed placement
- Open vs closed kitchen
- Storage priorities
Why This Helps
All contractors work from the same baseline, making quotes:
- More accurate
- Easier to compare
The Bottom Line
Your floor plan is a starting point, not the final reality.
Small differences on-site can have a big impact.
Always:
- Use the plan for orientation
- Verify everything on-site
- Measure before final decisions
