The cost to build a duplex house in Bangalore varies depending on factors like location, materials, labor, and design complexity. On average, the house construction cost in Bangalore ranges between ₹1,800 to ₹3,500 per square foot. For a 2,000 sq. ft. duplex home, the cost can range from ₹36 lakhs to ₹70 lakhs. High-end materials, premium interiors, and smart home features may further increase expenses. Proper planning, choosing an experienced contractor, and using cost-effective materials can help manage the budget efficiently. Investing in quality construction ensures durability, better aesthetics, and long-term value for your dream duplex home.