Check Proposed Road Widening Status
Click on any location on the map to check if it falls within a proposed road widening zone. Different widening categories affect property setbacks and development rights.
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Understanding Proposed Road Widening in Chennai
Introduction to Road Widening
Proposed road widening is a critical part of Chennai's urban planning strategy aimed at reducing congestion, enhancing traffic safety, and accommodating the city’s growing mobility needs. These plans involve increasing the width of existing roads based on future urban growth projections and traffic studies.
Classification of Widening Proposals
Chennai classifies proposed road widening into three categories based on the final designated width of the road:
| Category | Final Road Width | Common Usage | Minimum Front Setback (from Property Line) |
|---|---|---|---|
| Category 1 | 18.0m to 24.0m | Secondary arterial roads | 4.5m |
| Category 2 | 27.0m to 30.5m | Primary arterial roads | 6.0m |
| Category 3 | 45.0m and above | Expressways / highways | 6.0m+ |
Note: Setbacks are calculated from the proposed road boundary as defined in the approved master plan or street alignment, not the current road edge.
Development Impact
- Setbacks: All new buildings must maintain setbacks from the proposed street alignment line or new road line.
- FSI: Floor Space Index varies based on road width and location, with potential for Premium FSI benefits.
- Usage: Wider roads may support commercial or institutional zoning.
- Compensation: If notified by authorities, owners may receive compensation or Transfer of Development Rights (TDR).
Guidelines for Each Road Category
Category 1 (18.0m to 24.0m):
- Minimum front setback: 4.5m
- Suitable for stilt + 3 floors or GF + 2 floors
- FSI: Up to 2.0 in non-high-rise zones
- Used for mixed-use and residential projects
Category 2 (27.0m to 30.5m):
- Minimum front setback: 6.0m
- Eligible for high-rise buildings depending on zone
- Premium FSI (up to 50% extra) possible on 18m+ roads
- Higher density and commercial zones supported
Category 3 (45.0m+):
- Minimum front setback: 6.0m or more as per project height
- Typically for large infrastructure or institutional campuses
- FSI: Up to 3.25 with premium eligibility
- Mandatory environmental and traffic clearances
Steps Before Property Development
- Check CMDA or Corporation maps for widening proposals.
- Mark proposed road line and setback in your site layout.
- Submit plans with accurate setback details.
- Secure NOC from relevant road/highway authority if required.
- Provide road-widened land via registered gift deed if instructed.
FAQs
Can I construct up to the current road edge?
No. You must leave the setback from the proposed road line, even if widening hasn’t started.
Will I be compensated?
Yes, via direct compensation or TDR if your land is acquired officially for road widening.
Can I get higher FSI?
Yes. If your site abuts roads 18m or wider, you may qualify for up to 50% Premium FSI depending on location and use.
What is the official source of this information?
The details come from the Tamil Nadu Combined Development and Building Rules (TNCDBR) and CMDA Master Plans.
How This Tool Helps
- Search or click on your location.
- Find out which road category your site is along.
- Get accurate front setback and FSI information.
- Plan your building accordingly with architects and authorities.
Disclaimer
This tool is for preliminary guidance only. Road alignments, FSI allowances, and setbacks are subject to change as per official planning authority decisions. Always consult CMDA, DTCP, or local planning office before starting construction.
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