Realestate

CMDA Building Plan Approval Online and Self-Certification

Small homes can get instant self-certified permits online. A wider 5,000 sq ft scheme announced on 28 August 2026 still awaits a government order.

18 October 2026

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CMDA plans online, self-certify small homes

Building plans in the Chennai Metropolitan Area are now filed online, through the Chennai Metropolitan Development Authority‘s Online Planning Permission Application system, which is linked to the state’s Single Window Portal. For a small house there is a faster route: self-certification, under which the owner declares that the plan meets the rules and gets a permit straight away instead of waiting for scrutiny.

That route is about to get wider. On 28 August 2026 the Housing and Urban Development Minister announced in the Assembly that self-certification would cover homes of up to 5,000 sq ft, PTI reported. As of mid-October no order notifying the new limits had been reported, so plan under the existing rules until the portal changes.

The regular online route

CMDA’s own notices, on its website, set out how applications now move:

Since 1 September 2023, all planning permission fees are received only online. Offline NEFT or RTGS payments are not honoured.
The layout module of the online system went live on 19 September 2023, and layout applications are now accepted only online.
From 5 September 2024, applications for village panchayats and panchayat unions inside the metropolitan area are filed only through the Single Window Portal, after integration with the Rural Development department.
Applications filed before 27 September 2023 can still be viewed on the older Online PPA portal.

In practice an owner engages a registered architect or engineer, who prepares the drawings and uploads them with the ownership documents. Site inspections can still happen after you file.

Which office approves your plan depends on size and location. Within corporation and municipal limits, the local body handles most ordinary homes. Under the August 2026 changes, corporations and municipalities can approve residential buildings of up to 16,140 sq ft, up from 10,000 sq ft, and town and village panchayats up to 12,912 sq ft, DT Next reported. Larger and special buildings go to CMDA.

Self-certification: how it started and what applies now

The state launched instant online permits based on self-certification on 22 July 2024, PTI reported at the time. The official user manual issued with it set these conditions:

Plot area within 2,500 sq ft.
Built-up area up to 3,500 sq ft.
Ground or Ground plus one buildings, with a maximum height of 7 metres.
Plots that need a no-objection certificate from another department are excluded. A GIS check on the portal decides this, and if an NOC is needed you must use the normal route.
Anything above these limits goes through the usual building plan process.

The scheme has since been revised, and reports say Stilt plus two homes were added in 2025. The portal’s eligibility screen is the safest guide to what applies to your plot today. The applicant fills in a self-declaration and e-signs the permit and drawings, so responsibility for following the approved plan rests with the owner and the professional who prepares it.

Self-certification does not relax the building rules. Land use, floor space index, road width, setbacks, parking and height limits still apply, and a building that departs from the approved plan can face action later.

The August 2026 changes

According to PTI’s report of Minister B. Rajkumar’s announcement and DT Next, the main changes are:

Self-certification for residential buildings of up to 5,000 sq ft built-up area, up from 3,500 sq ft, covering Ground plus two and Stilt plus three buildings.
Self-certification for small commercial buildings of up to 1,500 sq ft.
Third-party certification for commercial buildings up to 3,230 sq ft, residential buildings up to 8,070 sq ft, and industrial buildings up to 26,900 sq ft in approved SIDCO, SIPCOT and ELCOT layouts.
Commercial approval powers for all local bodies raised to 5,380 sq ft.
The land-use change process, handled by the Directorate of Town and Country Planning, to be moved fully online.

The plot size cap, height limit, fees and start date for the wider scheme will be set by the government order that gives effect to it.

High-rises and the June 2026 change

For buildings taller than 18.3 metres, a June 2026 government order removed the need for final approval at government level, which the minister used to grant as CMDA chairman. CMDA’s member secretary said this saves about two months, and the authority cleared about 17 high-rise proposals within roughly a month, as many as in all of 2024, DT Next reported. This mostly affects developers, but flat buyers may see projects start sooner.

Old approvals and records

If you are buying an older house or flat, ask the seller for the original planning permission. CMDA says it has digitised planning permission records for 1989 to 2005 and 2016 to 2021. A missing or mismatched approval can hold up a bank loan or a later regularisation request.

Practical tips before you file

Get your title deed, patta and encumbrance certificate in order first. The online system asks for ownership documents at the start.
Check the road width in front of your plot. It often decides floors and setbacks more than plot size does.
Keep the approval and plan copies safe. Banks ask for them, and you will need them later.
For help with the portal, the Single Window Portal lists a toll-free helpdesk, 1800 258 3878, and the email helpdesk@investtn.in.

For disputes over title or road widening, consult a lawyer before you build.

Quick answers

Can I get a building permit without visiting an office?

Yes. Applications, fees and documents go through the online system, though site inspections may still happen.

Does self-certification cover a G+2 house now?

It was announced on 28 August 2026 for homes up to 5,000 sq ft, including Ground plus two and Stilt plus three, but the order had not been reported by mid-October.

Can I pay CMDA fees by bank transfer?

No. Since 1 September 2023, planning permission fees are accepted only through the online system.

Information checked against official sources on 18 October 2026. Fees, dates and rules can change; confirm on the linked official pages before acting.