DTCP, CMDA, BMRDA, RERA: Which Approval Actually Protects Plot Buyers?

Every plot brochure carries an approval logo. Very few buyers know what that logo actually promises. Let's fix that.

The authorities, decoded

DTCP (Directorate of Town and Country Planning) — Tamil Nadu's planning authority for areas outside major city limits. A DTCP-approved layout means the layout plan (roads, open space reservation, plot dimensions) was sanctioned. It does not certify the seller's title.

CMDA — the same function for the Chennai Metropolitan Area. If a "CMDA-approved" plot lies outside CMDA limits, someone is lying.

BMRDA / BDA — Bangalore's regional and development authorities. BMRDA approves layouts in Bangalore's surrounding taluks (Sarjapur, Anekal, Devanahalli); BDA covers the city's development area.

RERA — a different animal. RERA registration means the project and promoter are registered, with disclosed plans, timelines and an escrow discipline. Plotted developments above a threshold size must register.

What no approval certifies

Title. An approved layout on disputed land is still disputed land. Approval ≠ ownership, which is why you always pair the approval check with an Encumbrance Certificate (EC) and a lawyer's title opinion.

Two-minute verification

1. Ask for the approval number and year — a genuine seller shares it instantly.
2. Check it on the authority's portal (DTCP Tamil Nadu, CMDA, RERA state portals all have public search).
3. Match the layout plan plot number with your schedule in the draft sale agreement.
4. Confirm Open Space Reservation (OSR) land is gifted to the local body — encroached OSR sinks layouts later.

Rule of thumb: approval tells you the layout is legal to build on; the EC and title opinion tell you the seller can actually sell it. You need both.