4-room HDB flat floor plan: size, layout & how to measure it

85–93 m²
typical internal floor area
3 bedrooms
layout

Singapore's most common flat type at roughly 85–93 m² with three bedrooms — the bread-and-butter of renovation and flooring quotations in the city-state.

What the layout looks like

Modern 4-room layouts (post-2000 Model A) run around 90 m² including the household shelter and service yard; newer BTO plans trend slightly smaller at ~85 m². Expect a main bedroom with attached bath, two further bedrooms, and an open living/dining strip from the entrance — the living-room polygon usually folds in a corridor to the bedroom doors.

Measuring it accurately

The reliable way to measure any 4-room hdb plan is off the drawing itself: calibrate against a printed dimension line, then trace each room along the inside face of the walls. The corridor between the living room and bedrooms belongs to the living-room flooring area — close room boundaries straight across door openings rather than notching around them, and keep bathroom thresholds with the room on each side of the wall line.

PlanTape does the tracing for you — AI detects every labelled room and the scale line in under two minutes, you fine-tune the corners, and the per-room areas and skirting perimeters export as a CSV.

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Common questions

How big is a 4-room hdb flat?

Typically 85–93 m² of internal floor area, with 3 bedrooms. Exact size varies by launch year and block type — the floor plan for your specific unit is the only reliable source.

How do I measure a 4-room hdb flat floor plan for a flooring quote?

Upload the floor plan PDF to PlanTape: AI traces each room along the inside face of the walls and calibrates scale from a printed dimension. The corridor between the living room and bedrooms belongs to the living-room flooring area — close room boundaries straight across door openings rather than notching around them, and keep bathroom thresholds with the room on each side of the wall line. Then export per-room areas and perimeters as CSV.

What should I watch out for on 4-room HDB plans?

Modern 4-room layouts (post-2000 Model A) run around 90 m² including the household shelter and service yard; newer BTO plans trend slightly smaller at ~85 m². Expect a main bedroom with attached bath, two further bedrooms, and an open living/dining strip from the entrance — the living-room polygon usually folds in a corridor to the bedroom doors.

Other home types

2-room Flexi3-room HDB5-room HDBExecutive AptMaisonetteJumbo