Layout approval check — approved vs unapproved plots
Process as publicly described by CMDA, DTCP and the Tamil Nadu revenue and registration departments · Last reviewed
A plot is only as good as its layout's approval. Ask for the approval letter and plan, look the number up on the approving authority's own list (CMDA inside the Chennai Metropolitan Area, DTCP elsewhere in Tamil Nadu), find your plot number on the approved plan, and confirm it is released. A plot in an unapproved layout routinely cannot get a building plan approved.
A plain-language description of a public process, not legal advice. Procedures, forms, fees and timelines change — confirm each step on the official portal, and have a property lawyer and a licensed architect or engineer handle your actual file.
How to verify, step by step
- Get the papers. The approval letter (authority, approval number, date, survey numbers covered) and a copy of the approved layout plan. “Approval applied” or “approval expected” is not approval.
- Match the authority to the land. The survey numbers on the letter must be the ones on your sale deed, and the authority must be the one that covered that village on the approval date — see CMDA vs DTCP.
- Verify the number independently. Look it up on the authority's own approved-layout list or at its office. A number only the seller can show you is not verified.
- Find your plot on the approved plan. Same plot number, same dimensions, same road frontage. Plots re-drawn or split after approval are not on the approved plan.
- Confirm the plot is released. If plots were held back pending works, ask for the release order naming your plot number.
- Check the hand-over. Roads and the open space reserve are typically gifted to the local body by registered deed — ask for its details.
This is one row of the full due-diligence list — the plot documents guide and the plot buying checklist cover the rest.
Approved vs unapproved, at a glance
| Approved layout, plot released | Unapproved layout (“revenue site”) | |
|---|---|---|
| Building plan approval | Can be applied for in the normal way | Routinely refused unless regularised |
| Home loan | Banks lend against it in the normal way | Many banks will not lend |
| Roads and services | Roads and open space handed to the local body | Often private, unfinished or disputed |
| Resale | Ordinary | Fewer buyers, lower price |
Once the layout checks out
The approval does not tell you what you may build — that is the plot size, road width and zone. See the setbacks, FSI and floors computed for your plot on the setback rules guide, then the building plan approval guide for the next step.
Frequently asked questions
How do I check whether a layout is approved in Tamil Nadu?
Get the approval letter and the approved layout plan from the seller, note the authority, approval number and date, and look that number up on the same authority's approved-layout list — CMDA for the Chennai Metropolitan Area, DTCP elsewhere. Then find your plot number on the approved plan itself.
What is plot release in an approved layout?
When a layout is approved, a share of its plots is often held back — mortgaged to the authority — until the developer finishes the roads and other works. Those plots are released later by an order. Buying a plot that is still held back means it cannot get a building plan until the release is issued.
What happens if I buy a plot in an unapproved layout?
Building plan approval is routinely refused, bank loans are hard to get, utility connections can be delayed and resale suffers. Tamil Nadu has run a regularisation scheme for unapproved plots and layouts, but whether it is open, whether your plot qualifies and what it costs are never guaranteed — treat regularisation as a risk, not a plan.
Are DTCP-approved and CMDA-approved layouts equally safe?
Yes, if the approval is genuine and from the authority that covered that land when it was granted. Both apply the same building rules. The CMDA vs DTCP guide explains how to tell which one should have approved your plot.
What should be handed over in an approved layout?
The roads and the open space reserved in the approved plan are typically gifted to the local body by a registered gift deed. Ask for that deed's details; roads that were never handed over may never be maintained.
More before-you-build guides
- Building plan approval in Chennai — the steps — Who approves a house plan, who files it, the documents, the online application and what happens after the permit.
- CMDA vs DTCP approval — which one applies to your plot — The two planning authorities in Tamil Nadu, where each one's area ends, and how to tell which approved a layout.
- Plot documents to check before buying in Tamil Nadu — Patta and chitta, EC, the title chain, the approved layout and the FMB sketch: what each one proves and where to pull it.
- Chennai setback rules, FSI and height limits — the numbers themselves, computed from TNCDBR 2019.
- Plot buying checklist — every due-diligence check, its red flags and who verifies it.