The planning area is set to increase from the existing 1,189 sq. km. to 5,904 sq. km., extending into surrounding districts and reaching Arakkonam taluk in Ranipet district.

The decision to incorporate the expanded areas adds another layer of complexity to the Third Master Plan, which is intended to guide Chennai’s urban growth over the coming two decades. The additional regions will need to be considered in land-use planning, infrastructure development, transportation connectivity and future urban expansion.

Third Master Plan: Progress So Far

Chennai’s Third Master Plan has been under preparation since 2020, with CMDA undertaking technical studies, collecting public feedback and consulting government departments and other stakeholders. The process has also involved a review of the draft by planning experts to identify practical issues before finalisation.

More than 40,000 responses were received during the consultation process, while studies covering multiple aspects of urban development have informed the planning exercise. With the metropolitan boundary expanding from 1,189 sq. km. to 5,904 sq. km., CMDA now faces the additional task of incorporating the newly added regions into the long-term planning framework.

Chennai Metropolitan Area Expansion: From 1,189 to 5,904 Sq. Km.

The expanded metropolitan area will be nearly five times the size of Chennai’s existing metropolitan region.

Key details include:

• Existing metropolitan area: 1,189 sq. km.
• Expanded metropolitan area: 5,904 sq. km.
• Additional area: Approximately 4,715 sq. km.
• Regions covered: Parts of Chengalpattu, Kancheepuram and Tiruvallur districts, along with Arakkonam taluk in Ranipet district.

The expansion brings a much wider geographical area into Chennai’s long-term urban planning framework. Instead of focusing primarily on established urban areas, planners will have to consider how surrounding towns and developing regions connect with Chennai through roads, public transport, housing, employment centres and essential services.

However, inclusion within the expanded planning area should not be interpreted as automatic approval for residential development or as a guarantee that new infrastructure projects will be implemented.

Which towns and regions are included?

The expansion covers 1,225 additional villages across 15 taluks, according to reporting on the Government Order. The following municipalities and towns are among those associated with the expanded metropolitan region.

Ranipet district

• Arakkonam

Kancheepuram region

• Kancheepuram
• Kundrathur
• Mangadu

Tiruvallur region

• Tiruvallur
• Tiruttani
• Poonamallee
• Thiruverkadu
• Thiruninravur
• Ponneri

Chengalpattu region

• Chengalpattu
• Maraimalai Nagar
• Guduvancheri

This is a list of key towns, not the complete list of villages or the precise legal boundary. For property-level verification, use the official expansion map and the relevant village or taluk records.

The Expanded Region Being Added to the Third Master Plan

The Third Master Plan was initially being prepared for Chennai’s existing 1,189 sq. km. metropolitan area. Following the expansion of the metropolitan boundary, CMDA has moved to incorporate the newly added regions into the planning exercise.

A metropolitan master plan must account for more than a city’s existing built-up areas. It also needs to consider future development pressure in peripheral regions, infrastructure availability, environmental constraints and the connections between urban centres.

The enlarged planning area will therefore require a broader assessment of where growth should take place and what infrastructure will be needed to support it.

What does this mean for real estate?

For real estate reporting, the expansion is significant because it creates a larger metropolitan planning framework.

• Land-use planning: Local-area plans can help establish how land is intended to be developed.
• Transport connectivity: Roads and public transport need to be coordinated across the enlarged region.
• Infrastructure: Water supply, drainage, sewerage and other urban services become important planning considerations.
• Property due diligence: Inclusion within the metropolitan boundary does not automatically make agricultural or unapproved land eligible for residential development.
• Investment decisions: The expansion alone does not guarantee appreciation or confirm that a proposed infrastructure project will be implemented.

These are planning implications, not guarantees of individual property rights or investment returns.

What Happens Next?

CMDA must include the expanded areas in the Third Master Plan and complete the necessary studies. The draft plan will then need to go through public consultation and the approval process.

The final planning provisions will determine how the expanded metropolitan area is zoned, which infrastructure priorities are identified and what development controls apply in individual locations.

Until the final plan is notified, property owners and buyers should not assume that the expansion automatically permits development on their land.

Conclusion: A Larger Planning Responsibility for Chennai

The expansion to 5,904 sq. km. brings a wider region, including Arakkonam, into Chennai’s Third Master Plan. Its success will depend on effective planning for land use, transport, infrastructure and environmental protection. The final plan will determine how these changes affect future development and real estate.

Stay connected with Verified.RealEstate for updates on Chennai’s Third Master Plan, metropolitan expansion, land-use planning and property regulations affecting Tamil Nadu.

Why Is This Corridor Growing So Quickly?

The primary driver behind this region’s surge is its strategic location. It seamlessly connects two major economic engines:

• The IT Belt (OMR): Direct access to Siruseri SIPCOT IT Park, Padur, and Navalur.
• The Transit & Industrial Belt (GST Road): Quick access to the Kilambakkam Bus Terminus (KCBT), Vandalur Railway Station, and industrial hubs toward Maraimalai Nagar and Oragadam.

As land prices on core OMR and central Chennai climb, families and businesses are moving to the Vandalur–Kelambakkam–Thiruporur road for more space, cleaner air, and better affordability.

The Power of Educational Institutes & Healthcare Centers

One of the biggest reasons for high property demand here is the presence of mega educational institutions and hospitals. Tens of thousands of students, teachers, doctors, and staff commute here every day, creating a constant demand for homes and businesses.

Major Educational Colleges & Schools

• Universities & Colleges: VIT Chennai, SRM Institute of Science and Technology (Vandalur Campus), Hindustan Institute of Technology & Science (Padur), SSN College of Engineering, and Crescent University.
• Schools: Delhi Public School (DPS), Velammal Vidyalaya, Sushil Hari International, and Gateway American International School.

Major Healthcare Hubs

• Chettinad Health City (Kelambakkam): A massive multi-specialty hospital and medical research center.
• Tagore Medical College & Hospital (Rathinamangalam): Serving thousands of local residents and student doctors.

Real Estate Impact: Because students and medical personnel need places to stay and shop, neighborhoods near these campuses enjoy ** rental occupancy rates** and quick property resale turnaround.

Commercial Real Estate: What’s in Demand for Buying, Renting & Leasing?

While residential housing gets plenty of attention, commercial activity along the Vandalur–Kelambakkam–Thiruporur road is booming. The steady influx of residents and students has created urgent demand across several commercial property sectors:

A. Retail Shops, Showrooms & Supermarkets

• Demand Driver: Daily needs for expanding residential gated communities.
• Hot Spots: Main road frontages in Kelambakkam Junction, Mambakkam, Kandigai, and Thiruporur town.
• Activity: Investors are buying road-facing commercial plots, while retail brands, supermarkets, banks, and restaurants are leasing multi-story ground-floor shops.

B. Student Hostels, PG Accommodation & Co-Living

• Demand Driver: Tens of thousands of out-of-station students attending VIT Chennai, SSN, and Hindustan University.
• Activity: High demand for leasing individual houses, entire apartment floors, or buying small land parcels to construct dedicated Paying Guest (PG) hostels.

C. Warehousing, Industrial Sheds & Logistics

• Demand Driver: Proximity to GST Road factories and OMR tech parks.
• Hot Spots: Micro-markets like Nallambakkam, Vengapakkam, and Kolapakkam.
• Activity: Companies are actively leasing or buying small-to-medium industrial sheds, godowns, and storage facilities for e-commerce delivery hubs and light manufacturing.

D. Private Office Spaces & Co-Working Hubs

• Demand Driver: Small IT services companies, contractors, clinics, and consultants who want affordable office space near OMR without paying prime OMR rents.
• Activity: Renting 500 to 2,500 sq. ft. plug-and-play offices or furnished commercial spaces along the main road.

Price Snapshot (Land, Apartments, Villas & Commercial)

Here is a clear look at current market rates across the corridor:

Important Factors

Before buying land or renting a property in this area, you must keep two unique legal and physical checks in mind:

1. Forest Reserves & Eco-Sensitive Zones (ESZ)

• The Location: The region runs alongside the Vandalur Reserve Forest (1,400+ acres) and forest patches near Thaiyur, Kayar, and Illalur.
• The Rule: Land falling within designated Eco-Sensitive Zones (ESZ) near forest boundaries has strict building restrictions. Heavy industrial setups are banned, and residential building height approvals require extra clearance.
• What to Check: Ensure the plot has official DTCP or CMDA layout approval and a clear Patta to avoid buying encroached or restricted forest-edge land.

2. Air Force Station (AFS) Tambaram Restrictions

• The Location: Air Force Station Tambaram is located roughly 6 to 14 km northwest of this corridor.
• The Rule: Military aircraft fly directly over parts of Vandalur, Mambakkam, and outer Sittalapakkam during takeoff and landing. The Ministry of Defence enforces strict height restrictions using Colour-Coded Zoning Maps (CCZM).
• What to Check: If you plan to build a multi-story apartment building or high-rise commercial structure (usually above 3 or 4 floors), you must obtain an Air Force No Objection Certificate (NOC) to ensure your building doesn’t block flight safety funnels or military radar.

Smart Buyer & Tenant Checklist

1. Verify Land Approvals: Look strictly for DTCP or CMDA approved layouts registered under TN-RERA. Avoid unapproved “panchayat plots” that promise unrealistically low prices.
2. Check Groundwater Quality: Relying on tanker water can get expensive. Test borewell water depth and TDS levels on the specific plot before finalizing a purchase or long-term lease.
3. Inspect Road Width: Commercial properties need at least a 30-foot or 40-foot wide access road for easy customer parking and heavy delivery vehicle access. Under Tamil Nadu Combined Development Rules (TNCDBR), the width of your abutting road directly determines your allowable building height and calculates the exact FSI (Floor Space Index) and Premium FSI you can build on your plot.
4. Evaluate Flood Levels: Ask locals about water logging during heavy monsoon seasons, especially for lands near Thaiyur Lake or lower-lying river basins.

Summary

The Thiruporur–Kelambakkam–Vandalur belt offers a great balance of affordability, strong rental returns, and long-term capital appreciation. this corridor stands out as South Chennai’s premier growth engine.

Whether you’re buying a home near green belts, investing for student rental yields, or securing prime commercial frontage, The Verified Real Estate team provides the expert, ground-level assessment you need

They conduct comprehensive due diligence by reviewing a 30-year document history and TNREGINET Encumbrance Certificates (EC) to confirm clear title and ownership. They verify Patta, Chitta, and FMB records on state portals for precise survey boundary matching, cross-verify CMDA/DTCP approvals, TNRERA compliance, and flag critical risks such as Eco-Sensitive Forest Buffer Zones, AFS Tambaram height limits, or waterbody encumbrances. Finally, on-ground surveyors measure boundaries to check for overlaps or road-widening impacts, delivering a bank-accepted Legal Opinion report to protect your investment.

What is the Third Master Plan About?

The Third Master Plan (TMP) is a data-driven development framework designed to navigate the challenges of Chennai’s rapidly expanding urban footprint. Moving forward from the previous Second Master Plan, the TMP focuses on upgrading Chennai into a world-class, highly efficient metropolis. Its primary goal is to seamlessly balance the region’s long-term economic competitiveness with high environmental sustainability, climate resilience, and everyday liveability.

Core Concepts of the Third Master Plan

During these early interactive sessions, stakeholders and urban local bodies emphasized several foundational planning concepts that will define the upcoming master plan:

1. Infrastructure, Mobility, and Transit-Oriented Development (TOD)

A central pillar of the plan is the integration of land-use planning with the city’s transport networks. The CMDA aims to build a highly efficient multimodal transport network. By prioritizing Transit-Oriented Development, the plan will cluster high-density residential and commercial spaces around major metro, rail, and bus corridors to maximize public utility use and systematically curb traffic congestion.

2. Growth Management and Urban Density

To address rapid population expansion, the plan focuses heavily on smart density management. Instead of allowing unchecked horizontal sprawl into suburban areas, the framework emphasizes optimizing land utilization within the existing planning limits to support balanced, organized regional growth.

3. Climate Resilience and Environmental Sustainability

Adapting to increasing climate risks is a major priority for the new framework. The plan outlines strategies to strengthen disaster preparedness across the Chennai Metropolitan Area. This includes mapping out strict protections for the city’s vital ecological assets, green spaces, wetlands, and water bodies to protect them from unauthorized development.

4. Housing and Everyday Liveability

The TMP aims to elevate the baseline quality of life for Chennai’s residents by expanding accessible public green spaces, promoting mixed land-use zones (placing workplaces, commercial centers, and homes closer together), and significantly expanding access to affordable housing.

The Consultation Process and Implementation Timeline

The CMDA is actively gathering a highly diverse range of data and perspectives by involving a broad spectrum of participants in these sessions, including:

• Government & Civil Authorities: Urban local bodies, infrastructure providers, and regional transport authorities.
• Industry & Technical Experts: Real estate professionals, academic institutions, and professional urban planning organizations.
• Community Representatives: Civil society organizations and non-governmental bodies.

International Experts Roped In to Review Draft Plan

To ensure the framework aligns with global standards and avoids execution bottlenecks, the Tamil Nadu Housing and Urban Development Department has decided to rope in international town planning experts to thoroughly review the draft of the Third Master Plan. The CMDA has been working on this plan for the last five years, investing nearly ₹2.5 crore, with a target to release the draft before the Second Master Plan lapses in September. Because internal sources have flagged certain practical difficulties and shortcomings in the current draft, these global experts will help tweak and refine the framework. The goal is to deliver a highly accurate and legally sound final blueprint that will successfully dictate Chennai’s metropolitan growth through its horizon period of 2047.

When Will It Be Introduced?

While an exact calendar launch date for the final document is not specified, the process is actively moving through its mandatory drafting stages. CMDA officials noted that this current exercise marks the beginning phase; the authority is scheduled to conduct additional rounds of consultations to evaluate all feedback before finalizing and officially releasing the draft plan to the public.

The consultations are intentionally structured to be inclusive, bringing together a wide array of perspectives from government agencies, transport authorities, industry representatives, infrastructure providers, academic institutions, planning professionals, and civil society organizations.

What Has Been Done So Far?

TThe preparation of the Third Master Plan commenced in December 2020. Since then, CMDA has:

• Conducted public consultations across Chennai and suburban areas.
• Held stakeholder meetings covering housing, transport, infrastructure, environment, economy, and technology.
• Undertaken more than 15 studies on land use, blue-green infrastructure, income patterns, gender-inclusive planning, temporal growth, and climate resilience.
• Prepared a vision document that forms the foundation of the master plan.

The plan also proposes major urban reforms such as transit-oriented development, vertical growth through higher FSI, mixed-use development, climate-resilient infrastructure, and the creation of new economic hubs.

Why Is an International Review Being Considered?

According to reports, the government intends to have the draft reviewed because certain aspects of the plan require further refinement to ensure practical implementation and alignment with global urban planning standards. International experts are expected to examine the plan’s proposals, identify any shortcomings, and provide recommendations that could help create a more robust and future-ready framework for Chennai’s growth.

If significant modifications are suggested, the government may revise portions of the draft before placing it in the public domain.

Chennai Metropolitan Area Expansion

One of the most significant developments during the preparation of the Third Master Plan was the expansion of the Chennai Metropolitan Area (CMA) in 2022. The planning area increased from approximately 1,189 sq km to about 5,904 sq km, bringing several additional urban and peri-urban regions under the metropolitan planning framework.

The integration of these newly added areas into the future planning framework is still under consideration, with separate regional plans expected to address the development needs of the expanded regions.

Why the Third Master Plan Matters for Real Estate

The Third Master Plan could have far-reaching implications for the real estate sector, particularly in:

• Metro corridors
• Transit-oriented development zones
• Mixed-use development areas
• Industrial clusters
• Commercial hubs and growth corridors

Potential impacts could include:

• Increase in land values.
• Higher development potential.
• Greater redevelopment opportunities.
• New infrastructure investments and economic activity.

However, since the draft has not yet been officially notified, landowners, developers, and investors should closely monitor these aspects and exercise caution before making any investment or project planning decisions until the final plan is released.

Grid of Roads Proposal: A Key Aspect to Watch

Another important aspect that stakeholders may need to closely monitor is the proposed Grid of Roads (GoR) network, which has already generated concerns within the real estate sector.

The proposal seeks to establish a planned road hierarchy and improve connectivity across the Chennai Metropolitan Area. However, developers and landowners have raised concerns that some proposed road alignments pass through approved layouts and private developments, potentially affecting project planning, land utilisation, and future approvals.

As the Grid of Roads proposal is expected to form part of the future planning framework, stakeholders may need to carefully examine whether their properties are impacted by any proposed road reservations before initiating development projects or making investment decisions.

How Could the Third Master Plan Impact Stakeholders?

Landowners

Properties located within future growth corridors, transit-oriented zones, and areas identified for higher development potential could witness appreciation in land values and increased redevelopment opportunities.

Developers and Builders

A well-defined master plan can provide planning certainty, unlock new development corridors, and create opportunities for high-density, mixed-use, and transit-oriented projects.

Commercial Property Owners

Commercial assets situated near transport nodes, economic hubs, and major infrastructure corridors could benefit from increased demand, improved connectivity, and higher rental and capital values.

What Could the Final Third Master Plan Include?

Based on the various studies undertaken by CMDA and the themes discussed in public consultations and previous reports, the Third Master Plan is expected to address areas such as land use, housing, transportation, economic development, environmental management, climate resilience, infrastructure planning, and implementation mechanisms. However, the final structure and contents of the plan will become clear only after the draft is officially released.

What Happens Next?

The next stages in the process are expected to include:

1. Review of the draft by international experts.
2. Release of the draft Third Master Plan.
3. Public comments and objections.
4. Any major recommendations could lead to revisions before the draft is released. 
5. Government approval.
6. Final notification before the existing Second Master Plan expires.

As Chennai prepares for its next phase of urban growth, the Third Master Plan could become one of the most influential policy documents for the city’s real estate, infrastructure, and economic development over the coming decades.