The ongoing legal dispute over construction near Pallikaranai Marsh (see our full explainer if you're not familiar with the background) means buyers in South Chennai's OMR-adjacent belt now need to do one extra check before committing to a property: does this specific survey number fall inside the restricted zone?

This isn't a check most buyers were doing two years ago. It matters now. Here's how to actually do it.

Step 1: Get the Survey Number, Not Just the Address

CMDA's freeze order applies based on precise geographic boundaries, not locality names. "Perumbakkam" as a locality is large enough that some parts fall inside the reported 1km buffer and others don't. Ask the seller or builder for:

  • The full survey number and village name
  • The CMDA approval reference number, if planning approval has already been granted

Do not accept "it's approved, don't worry" without the approval document itself.

Step 2: Check the Approval Date Against October 9, 2025

CMDA's Office Order No. 07/2025, dated October 9, 2025, is the operative freeze order. As a rule of thumb:

  • Approved before October 9, 2025: The project's original planning approval predates the freeze — the strongest position to be in, though you should still confirm there's no subsequent stop-work or show-cause notice on the project.
  • Approved after October 9, 2025, inside the buffer: This should not exist under the current order. Treat any such claim with serious skepticism and verify directly with CMDA before paying any token amount.
  • Approval pending / "in process": Be aware this may be stuck indefinitely until the Madras High Court rules (next hearing: August 20, 2026) and the Tamil Nadu State Wetland Authority finalises the actual zone boundary.

Step 3: Verify Directly With CMDA — Not Just the Builder

CMDA's online portal (cmda.gov.in) lets you check building-plan approval status by application/approval number. For anything you can't confirm online, CMDA's public relations office can issue a Land Use Certificate (LUC) confirming a specific survey number's zoning status. For a purchase of this size, the LUC is worth the wait.

Step 4: Separate "TNRERA-Registered" From "CMDA-Approved"

These are two different things, and the freeze affects the earlier one. TNRERA registration is issued after a project already has local planning-authority (CMDA) approval — so a valid TNRERA number is a reassuring signal, but not a substitute for checking the underlying CMDA approval date directly if the project sits inside the reported buffer zone. Ask for both documents, not just the TNRERA certificate.

Step 5: Ask Your Lender Specifically

Because of the legal uncertainty, some banks have added extra scrutiny — or slowed disbursement — for projects in this belt, even where the underlying approval is valid. Before you pay any booking amount, confirm with your specific bank or lender, not just the builder's in-house loan desk, that they are currently financing purchases in that exact project.

What This Doesn't Affect

To be clear about scope, this extra step matters specifically for new construction approvals in the reported buffer localities. It does not retroactively affect:

  • Already-completed, previously-approved buildings where you're buying resale with no further construction planned
  • Localities well outside the reported buffer — most of OMR North, for instance, is unaffected

Bottom Line

The Pallikaranai case is still working its way through the Madras High Court, with the next hearing set for August 20, 2026. Until there's a ruling, the safest approach for any plot or under-construction project in Perumbakkam, Sholinganallur, Velachery, Perungudi, Thoraipakkam, Karapakkam, Semmancheri, or Pallikaranai itself is to verify the CMDA approval date and survey-number status directly, in writing, before you commit — regardless of what a listing or broker tells you.

Browse verified, RERA-registered properties in Chennai on Propspedia.

FAQ

Q: How do I check if my plot is inside the Pallikaranai 1km buffer zone?

A: Get the exact survey number and village name, then verify directly with CMDA — either through their online portal (cmda.gov.in) or by requesting a Land Use Certificate (LUC) for that specific survey number. Don't rely on locality name alone or a broker's assurance.

Q: Is TNRERA registration enough to confirm a project is unaffected by the freeze?

A: Not on its own. TNRERA registration follows CMDA planning approval, so for projects inside the reported buffer zone, also check the underlying CMDA approval date — specifically whether it predates the October 9, 2025 freeze order.

Q: Can I still get a home loan for a property in this belt?

A: Possibly, but confirm directly with your specific lender before paying a booking amount — some banks have added extra scrutiny for projects in the affected localities given the pending litigation.