G+2 House Plans & Three Storey Designs

Three G+2 layouts we build most

• Owner duplex (ground + first) with an independent second floor for rent or a married child, external or side stair to the top floor.
• Three independent floors (joint family): shared stair core, each floor a complete 2 or 3 BHK with its own kitchen and meters.
• Triplex: one family on all three floors, internal stair, bedrooms above, a terrace lounge or home theatre on top. Rare, but the best use of a small plot for a single large family.

Stairs, lift and structure

A G+2 stair climbs about 20 ft; parents and grandparents feel it. We plan the lift shaft (a 5 x 5 ft well) in every G+2 even when the client skips the lift, because adding it later costs three times more. The stair goes along a side wall or in a rear core so it does not split the 30 ft width; see staircase placement in a house plan. Structurally, G+2 means footings and columns sized from a soil report and a plinth beam that ties the whole frame; our engineer explains the extra steel in cement, steel and brick quantity per sq ft.

Bylaws, cost and when G+2 is not allowed

G+2 needs the FAR and height to permit it: a 30x40 plot with FAR 1.5 to 1.75 allows roughly 1,800 to 2,100 sq ft, so a full three floors needs FAR 2 or more, or a stilt that is excluded from FAR. Road width also caps height in most cities. Cost in 2026 is Rs 1,600 to 2,400 per sq ft for standard finish, so a 2,800 sq ft G+2 is about Rs 45 to 67 lakh excluding land; the third floor is the cheapest per sq ft because foundations are already paid for. Compare options in G+1 vs G+2 house design and the construction cost calculator.