Cost guide
Duplex House Design in Bangladesh Price and Build Cost
The duplex house design in Bangladesh price starts with a build cost of about ৳1,800 to ৳2,500 per sq ft in 2026, so a duplex with 1,200 sq ft on each floor costs roughly ৳43 lakh to ৳60 lakh. See prices by size and plot, and what to budget for separately.
2026 prices
Duplex house cost in Bangladesh by size
Pick the row closest to your plan to get a first budget for the structure and standard finishing.
| Duplex size | Total area | Build cost at ৳1,800 to 2,500 / sq ft |
|---|---|---|
| Compact, 900 sq ft per floor | 1,800 sq ft | ৳32.4 to 45 lakh |
| Standard, 1,200 sq ft per floor | 2,400 sq ft | ৳43.2 to 60 lakh |
| Large, 1,500 sq ft per floor | 3,000 sq ft | ৳54 to 75 lakh |
| Premium, 2,000 sq ft per floor | 4,000 sq ft | ৳72 lakh to 1 crore |
Source: Green Architect BD, Building Construction Cost in Bangladesh 2026. Excludes land, design fees, approval, boundary wall and interiors.
Duplex size by plot
Your plot sets the floor size, and the floor size sets the budget.
| Plot | Land area | Typical duplex floor |
|---|---|---|
| 2 katha | 1,440 sq ft | 800 to 950 sq ft |
| 3 katha | 2,160 sq ft | 1,200 to 1,400 sq ft |
| 5 katha | 3,600 sq ft | 1,500 to 2,100 sq ft |
| 10 decimal (village) | 4,356 sq ft | 1,400 to 2,000 sq ft |
Assumes about 55% to 60% ground coverage. Allowed coverage depends on local rules and road width.
How the duplex style changes the price
Modern duplex
Cantilevers and large glass cost more than a simple box.
Low cost duplex
A simple rectangle and standard windows keep costs down.
Village duplex
Veranda and courtyard, often with local labour.
Premium finish
Cladding, imported fittings and a rooftop garden add cost.
Semi duplex
Build part of the upper floor now, finish the rest later.
Luxury duplex
Double height living and custom details, quote based.
What else to budget for
| Item | Notes |
|---|---|
| Architect and structural design | Quoted by each firm; compare scope, not only price |
| Approval and soil test | RAJUK, CDA, pourashava or union parishad |
| Boundary wall and gate | Priced by length |
| Interiors | From ৳900 per sq ft, see the interior design cost guide |
See the interior design cost guide for finishing the inside.
Duplex projects and stages
The look and quality our partner firms work to.
Why families compare duplex quotes through BD House Design
Written by the BD House Design editorial team with input from the registered architects, engineers and interior firms we work with. How we research and check our pages.
Duplex house price questions
What is the duplex house design in Bangladesh price in 2026?
Building a duplex costs about ৳1,800 to ৳2,500 per sq ft for the structure and standard finishing. A duplex with 1,200 sq ft on each floor comes to roughly ৳43 lakh to ৳60 lakh. Design fees are quoted separately by each firm.
How much does a 1,500 sq ft per floor duplex cost?
About 3,000 sq ft in total, so roughly ৳54 lakh to ৳75 lakh at 2026 rates, before land, design, approval and interiors.
Is a village duplex cheaper to build?
Labour can cost less outside cities, but materials cost about the same and transport can add to them. Simple shapes, a veranda and standard windows are what really keep a village duplex affordable.
How can I lower the cost of a duplex?
Keep the shape simple with fewer corners, use standard window sizes, fix the finishes before work starts and get quotes on the same BOQ. A semi duplex that is finished later also spreads the cost.
Should I design the foundation for more floors?
If you may add floors later, yes. Designing the foundation and columns for the future height costs a little more now and avoids a far bigger cost later.
Guides
Guides to read before you start
Duplex House Design Ideas for Bangladesh
Floor plans, styles, climate tips and 2026 costs for two storey family homes.
RAJUK Building Plan Approval Process, Step by Step
Land use clearance, construction permit, documents, drawings and timelines.
Best House Exterior Colour Combinations for Bangladesh
Twelve palettes with colour codes, plus a paint system that lasts.
Get Free Quote
Get Free Quote for your duplex house
Tell us your plot size and location. We reply within one working day with up to three firms who design and build duplexes near you.