Is Your Plot in the Pallikaranai Ramsar 1 km Zone? What to Do Next
If your plot or flat is anywhere between Velachery and Sholinganallur, near the Pallikaranai marsh, you have probably heard "the 1 km rule" discussed with more certainty than the documents support. This page separates what the official CMDA order says from what people assume, helps you check your own plot on the official map, and then walks through what it means depending on whether you plan to build, sell, borrow or simply hold.
What the CMDA Order Actually Says
CMDA Office Order No. 07/2025 is dated 9 October 2025 and took effect from 6 October 2025. Its instruction to CMDA officers is: "not to grant any approvals/permissions in the RAMSAR Site boundary and its influence area as per the map enclosed herewith." The order quotes a National Green Tribunal direction that describes the zone of influence as 1 km, and it attaches the map that draws it.
Read this carefully: the order is an instruction about approvals that CMDA may grant. Its text does not mention existing buildings, sale of property, registration of documents or bank loans. That does not mean those are unaffected, or affected. It means this order does not answer them.
You can read the two-page order yourself on the CMDA website, or from our copy. For a line-by-line reading, see the detailed article on Axium Valuation's site.
Step 1: Check Where Your Plot Stands
This is the map CMDA attached to the order. Dark red is the marsh itself, pink is the Ramsar site boundary, and yellow is the 1 km influence area. Parcels with no colour are outside all three.
- Note your village and survey number from your patta, chitta, encumbrance certificate or sale deed.
- Find your village on the map. The map labels Velachery, Puzhuthivakkam, Madipakkam, Kulathur, Pallikaranai, Jalladianpet, Perumbakkam, Arasankalani, Semmancheri, Sholinganallur, Karapakkam, Okkiyam Thuraipakkam, Injambakkam, Perungudi and Seevaram. Several of them are only partly inside the coloured area.
- Match the survey number inside that village's orange boundary. The same survey number can appear in more than one village, so a number alone is not enough.
- Read the colour. Note whether your parcel is dark red, pink, yellow or uncoloured.
- If it touches an edge, or you cannot read it with confidence, treat it as unconfirmed. Ask CMDA or the Tamil Nadu State Wetlands Authority to confirm in writing, and keep that reply with your documents.
Step 2: Find Your Situation
What the order means for you depends on what you are trying to do. This is a practical guide, not legal advice. For anything with money or a deadline attached, please also speak to your advocate.
| If you want to... | What the order says | What to do next |
|---|---|---|
| Build, extend or redevelop | CMDA is instructed not to grant approvals or permissions in the mapped area. This is the situation the order is aimed at. | Ask CMDA in writing whether your application can be accepted. Do not start work on a verbal assurance from a broker or contractor, and follow the court hearing (see below). |
| Sell | The order does not mention sale or registration. | Know your zone status before you list. Buyers and their banks are likely to ask. Keep the map extract, your title documents and any CMDA reply ready. |
| Borrow, or your loan is up for review | The order does not mention lending. Each bank sets its own policy. | Ask your bank how it treats plots in this zone before you apply. An independent valuation that records the zone status makes that conversation easier. |
| Keep a building you already have | The order is about new approvals. It does not address existing structures. | Keep your approved plan and completion documents together. If you plan changes later, check with CMDA first, because those may need a fresh approval. |
| Hold or inherit | The order does not address ownership. | Keep your patta, chitta and encumbrance certificate current and note your zone status. Valuation for inheritance or tax filings still applies as usual. |
Is a Valuation Report Worth It for This Decision?
Checking your plot on the map is free, and it answers the first question. A valuation report answers a different one, so it depends on what you are doing.
- It helps when you need one anyway, for a home loan, capital gains, inheritance, a family settlement or a court filing. In those cases the report records your parcel's zone status and any limiting conditions, which protects you if the report is questioned later.
- It helps when you are pricing a sale or purchase and want an independent view of how the approval position affects what a willing buyer would pay.
- It cannot lift a restriction, confirm that an approval will be granted, or predict the court's decision. If your question is only "am I inside the zone?", start with the map and a written reply from CMDA.
Most property valuation assignments are completed in 5 to 7 working days. If you are unsure whether you need one, send me your village and survey number and I will tell you plainly.
What Could Change, and When
The map above shows a uniform 1 km zone, as ordered in October 2025. A variable-width buffer prepared by the National Centre for Sustainable Coastal Management has been proposed to the Madras High Court. It has not been adopted. Press reports say the court adjourned the case to 12 October 2026 after CREDAI Chennai submitted a representation, with the State Wetlands Authority asking for four weeks to consider it and produce an amended interim map. We have not seen the court's own order, so treat that date as reported.
Until an authority or the court changes it, the CMDA order and its map remain the reference. If the boundary changes, some parcels now in the yellow area could fall outside it and others could stay in, so a decision that depends on your zone status is worth revisiting after each hearing. I will update this page when the position changes.
Not sure where your plot stands?
Send me your village and survey number, or ask for a valuation report that records the Ramsar zone status clearly for your bank, CA or advocate.