3BHK G+2 Duplex on 30×40 — What Works on Site
Simple notes for planning a 3BHK G+2 on a tight plot—room positions, stacking, and what to avoid so the build stays practical.
Ground Floor (parking + rental/guest)
- Parking: Keep clear entry/turn radius. Don’t place columns where car door swings.
- 1BHK unit: Living + bed + pantry + common toilet. Works as guest/rental. Stack toilet with upper floors.
- Stair core: Fix early. Avoid cutting parking headroom with thicker beams.
First Floor (main family level)
- Master bed (SW): Attached toilet stacked on the same duct.
- Living + dining: Front/east side preferred. Keep movement short; avoid long corridors.
- Kitchen: SE or NW as services allow. Utility for laundry at the same level.
- Toilets: Align with ground duct; show sleeves before slab casting.
- Double-height? Use only if headroom allows and AC return path is planned; else skip to save cost.
Second Floor (family beds + hall)
- Two bedrooms: Each with attached toilets stacked on the same shaft.
- Family hall: Keep compact; avoid wasting area on wide landings.
- Balcony/pergola: Provide shading on west; plan for drain points.
Third Floor (optional)
- Multi-purpose: Home theatre / gym / extra bed.
- Services: Overhead tank, solar provision, and easy access to outdoor unit lines.
Why G+2 works on 30×40
- Bigger rooms, same footprint: Going vertical gives usable bedroom sizes.
- Better stacking: Wet areas one above another → fewer bends, fewer leaks.
- Privacy: Family level separated from rental/guest.
- Future-ready: Third floor stays flexible.
Quick dos & don’ts
- Do freeze the stair and duct early; drawings must show all sleeves at slab stage.
- Do keep common lintel/sill levels for faster fabrication.
- Don’t over-span living areas just for looks—steel and depth shoot up.
- Don’t push large projections/chajjas without proper drip and slope.
See Duplex Examples (30×40)
- West-Facing Duplex 3BHK Evening sun control, compact stair, aligned ducts.
- South-Facing Duplex (4BHK sample) South frontage with shading; stacked wet areas.
- North-Facing Duplex 3BHK Soft daylight; privacy from road managed.
- East-Facing Duplex 3BHK Morning light; kitchen SE/NW as per services.
Planning a 3BHK G+2 on 30×40?
Share facing, rental plan, parking and timeline. We’ll suggest a clear stair/duct strategy and room layout.
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