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RAJUK FAR Calculator Bangladesh

Free Floor Area Ratio Calculator for Dhaka & Bangladesh


Planning to build in Dhaka? Use our free RAJUK FAR Calculator to instantly find out how much you can build on your plot — fully based on RAJUK's official DAP (Detail Area Plan) regulations.

Enter your plot size, select your RAJUK zone, and the calculator will show you your maximum Floor Area Ratio (FAR), total allowable built-up area, ground coverage limit, and number of floors permitted.


We have built and launched Bangladesh's first fully up-to-date online RAJUK FAR Calculator for Dhaka, and it is completely free to use. No login required. No forms to fill. Just your plot details — and you get a complete planning analysis in seconds.


Or access it directly from our website at www.studio16architectsbd.com



What Is FAR and Why Does It Matter for Your Building?


What Is Floor Area Ratio (FAR)?

Floor Area Ratio (FAR) — also called Floor Space Index (FSI) — is the ratio of a building's total floor area to the size of the plot it stands on. It is one of the most important numbers in Bangladeshi building regulations because it directly controls how large your building can be.

FAR Formula:

FAR = Total Built-up Floor Area ÷ Total Plot Area

Example: If your plot is 5 katha (3,600 sq ft) and your RAJUK zone allows a FAR of 3.0, your maximum allowable built-up area is: 3,600 × 3.0 = 10,800 sq ft across all floors combined.


RAJUK FAR Regulations — DAP Zone Guide

RAJUK's Detail Area Plan (DAP) divides Dhaka into multiple zones, each with its own FAR, ground coverage, and height regulations. The key zones and their general FAR allowances are:

Zone Type

Typical FAR

Max Ground Coverage

Notes

Residential Zone A (Low density)

1.5 – 2.5

50%

Gulshan, Baridhara, Banani

Residential Zone B (Medium density)

2.5 – 3.5

55%

Dhanmondi, Uttara, Mirpur

Residential Zone C (High density)

3.5 – 5.0

60%

Mohammadpur, Rayer Bazar

Mixed Use Zone

3.0 – 6.0

60%

Commercial corridors

Commercial Zone

4.0 – 8.0

70%

Motijheel, Tejgaon

Note: Always verify your exact plot's DAP zone with RAJUK or a registered architect before finalising your design. FAR values may vary based on road width, plot size, and specific location within a zone.


How Many Floors Can You Build in Dhaka?

The number of floors you can build depends on three factors working together:

1. FAR (Floor Area Ratio) Your FAR limit controls the total built-up area across all floors. Once you use up your FAR, you cannot add more floors — even if the building is structurally capable.

2. Ground Coverage RAJUK limits what percentage of your plot can be covered by the building footprint. A higher FAR with a lower ground coverage means you must build taller floors to use your full allowance.

3. Road Width RAJUK's regulations tie maximum building height directly to the width of the road in front of your plot:

Road Width

Maximum Building Height

Up to 20 feet

G + 4 floors

20 – 30 feet

G + 6 floors

30 – 40 feet

G + 8 floors

40 – 60 feet

G + 10 floors

60 feet and above

G + 12 floors and above

These are general RAJUK guidelines. Exact limits depend on your DAP zone and specific plot conditions.

What Is Ground Coverage?

Ground coverage is the percentage of your plot area that your building's footprint can occupy at ground level. The remaining area must be left open — for setbacks, driveways, landscaping, and open space.

Ground Coverage Formula:

Ground Coverage % = Building Footprint Area ÷ Total Plot Area × 100

Example: If your plot is 5 katha (3,600 sq ft) and your zone allows 55% ground coverage: Maximum footprint = 3,600 × 0.55 = 1,980 sq ft

The remaining 1,620 sq ft must remain open around the building.

What Are RAJUK Setbacks?

Setbacks are the mandatory empty distances between your building and the boundaries of your plot. RAJUK requires setbacks on all four sides of a building:

Plot Size

Front Setback

Side Setback

Rear Setback

Up to 3 katha

1.5m

1.0m

1.5m

3 – 5 katha

2.0m

1.2m

2.0m

5 – 10 katha

2.5m

1.5m

2.5m

10 katha and above

3.0m

2.0m

3.0m

Setbacks reduce your effective ground coverage and must be accounted for when calculating your real buildable footprint.

How to Use This FAR Calculator

  1. Enter your plot size — in katha, decimal, or square feet

  2. Select your RAJUK zone — based on your plot's DAP designation

  3. Enter your road width — the width of the road directly in front of your plot

  4. Click Calculate — instantly see your FAR, maximum built-up area, ground coverage, and permitted floors

Not sure which RAJUK zone your plot falls under? Contact Studio 16 Architects — we'll check your DAP zone for free.


Why Use Studio 16 Architects for Your RAJUK Project?

Understanding your FAR is just the first step. Getting the most out of your plot — maximising usable space within RAJUK's regulations — requires an experienced, RAJUK-registered architect.

Studio 16 Architects has been helping clients across Dhaka and Bangladesh maximise their building potential since 2016. Our team of IAB-accredited architects and IEB-registered engineers handles everything from initial DAP zone checks to full RAJUK plan approval through the ECPS system.

We specialise in:

  • Luxury duplex and residential design

  • Apartment and commercial building design

  • Interior design and fit-out

  • Landscape and rooftop design

  • Full RAJUK approval for local and NRB clients

📧 info.s16a@gmail.com 📞 +880 1717-222907 (WhatsApp available) 🌐 www.studio16architectsbd.com



FREQUENTLY ASKED QUESTIONS (Add as FAQ section at bottom of page)

What is the full form of FAR in RAJUK? FAR stands for Floor Area Ratio. In RAJUK regulations it is also referred to as FSI (Floor Space Index). It defines the maximum total floor area allowed relative to your plot size.

How is FAR calculated in Bangladesh? FAR is calculated by dividing the total built-up floor area of all floors by the total plot area. For example, a 3,600 sq ft plot with FAR 3.0 allows a maximum of 10,800 sq ft of total built-up area across all floors.

What is the maximum FAR allowed by RAJUK in Dhaka? Maximum FAR varies by DAP zone. Residential zones typically allow FAR between 1.5 and 5.0. Commercial zones can allow up to 8.0. The exact FAR for your plot depends on its specific DAP zone designation and road width.

Can I build more floors than my FAR allows? No. RAJUK will not approve a building plan that exceeds the permitted FAR for your zone. Attempting to build beyond your FAR without approval is illegal and the structure can be ordered to be demolished.

Do NRB clients need to be in Bangladesh to get RAJUK approval? No. NRB property owners can authorise Studio 16 Architects through a Power of Attorney to handle the full RAJUK approval process on their behalf. You do not need to be present in Dhaka.

Is this FAR calculator free to use? Yes, completely free. Studio 16 Architects provides this calculator as a public resource for property owners, developers, and architects in Bangladesh.

How accurate is this calculator? This calculator is based on RAJUK's official DAP regulations. However, individual plots may have specific conditions that affect the final approved FAR. Always consult a RAJUK-registered architect for a definitive assessment of your specific plot.


INTERNAL LINKS TO ADD ON THIS PAGE

Link these phrases to the relevant pages on your site:

  • "RAJUK approval" → link to your blog post 02

  • "luxury duplex design" → link to your duplex projects page

  • "contact Studio 16" → link to /contact

  • "our services" → link to /services

  • "NRB clients" → link to blog post 01

This calculator and content is provided by Studio 16 Architects (S16A), a RAJUK-approved architectural and engineering design firm based in Baridhara, Dhaka, Bangladesh.


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