What Plot Size Do You Need for a 1BHK, 2BHK, 3BHK or 4BHK House?
By the VARAIPADAM team · Updated 14 October 2026
Quick answer: On one floor, a 1BHK needs about 600 sq ft, a 2BHK about 900 sq ft and a 3BHK about 1,100 sq ft of built-up area, before setbacks. Building G+1 roughly halves the area needed on each floor.
Area needed for each home
Rooms here are standard sizes with a pooja room; 3BHK and 4BHK include an attached toilet and a utility area. The built-up area adds space for walls and passages. Plot sizes are the house footprint: your plot must also leave the setbacks your local rules require.
| Home | Rooms add up to | Single floor needs about | Example sizes | G+1, each floor about |
|---|---|---|---|---|
| 1BHK | 528 sq ft | 600 sq ft | 20×30 | 400 sq ft |
| 2BHK | 788 sq ft | 900 sq ft | 20×50, 25×40, 25×50 | 550 sq ft |
| 3BHK | 938 sq ft | 1,100 sq ft | 30×40, 30×50, 30×60 | 650 sq ft |
| 4BHK | 1,198 sq ft | 1,400 sq ft | 40×60 | 850 sq ft |
Ways to fit more on a small plot
- Go G+1: bedrooms upstairs, hall, kitchen and dining on the ground floor.
- Choose compact rooms where you can live with them, often the second bedroom and the dining.
- On narrow 20 ft plots, plan rooms one behind another with a side passage, the usual Indian layout for such plots.
- Check the fit before you plan: VARAIPADAM shows how full your rooms make the floor and what to change.
Questions people ask
Is 600 sq ft enough for a 2BHK?
Only with compact rooms and a single toilet. A comfortable 2BHK with a dining area and pooja room needs about 850–900 sq ft on one floor.
Can a 3BHK fit on a 30×40 plot?
Yes, as a 30 × 40 ft footprint on one floor with standard rooms, or more comfortably as G+1. On a 30×40 plot with setbacks, the house is smaller, so G+1 is common.
How many square feet is a 20×30 plot?
600 sq ft. It suits a 1BHK on one floor, or a 2BHK as G+1.