Building plan approval in Chennai — the steps, in order
Process as publicly described by CMDA, DTCP and the Tamil Nadu revenue and registration departments · Last reviewed
To build a house in Chennai you need planning permission and a building permit before work starts. A licensed architect or engineer prepares the drawings to the Tamil Nadu Combined Development and Building Rules, 2019, files them online with your title papers, the local body (or CMDA, for larger buildings) scrutinises and inspects, and you build exactly what was approved. Typically a few weeks for a clean file; fees are computed on the official portal.
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.
The steps
- Make sure the plot can be built on. Clear title, patta in your name, and a plot in an approved layout (or one regularised). A plan application for a plot in an unapproved layout is routinely refused — see the layout approval check and the plot documents guide.
- Know your envelope. The setbacks, FSI, height and floor count your plot allows depend on its size, road width and zone. We compute them, with the rule cited, on the setback rules guide and on each plot-size page — or on your own plot in the floor plan generator.
- Engage a licensed professional. A registered architect, or an engineer or surveyor registered with the local body, prepares the site plan, floor plans, sections and elevation and signs them. Which professional can sign depends on the size of the building.
- Apply online. Tamil Nadu takes building plan applications through its single-window online planning-permission portal. The professional uploads the drawings and your documents; you pay the scrutiny fee the portal computes.
- Scrutiny and site inspection. The authority checks the drawings against the rules and the papers against the plot, and usually inspects the site. Queries come back to the professional — answer them on the portal, not by visiting.
- Pay the charges and receive the permit. Once cleared, the remaining charges are demanded and the planning permission and building permit are issued with the approved drawings. Keep the stamped set on site.
- Build to the approved plan, then close the file. Stage inspections and a completion or occupancy certificate apply depending on the building's category; utility connections and loans often ask for them.
Who files it — architect or engineer?
You are the applicant, but you do not draw or file it yourself. A registered architect (registered with the Council of Architecture) can prepare and sign building plans; for smaller residential buildings, an engineer or licensed surveyor registered with the local body can as well. The size of the building decides who may sign, so ask the professional to confirm in writing that your building is within their registration.
Plot2Plan's approval drawing is a starting document for that professional — dimensioned plans, site plan, area statement and blank signature boxes. It is not a submittable drawing.
Documents you will typically be asked for
- Registered sale deed (and the link deeds, if asked)
- Patta in your name, with chitta / FMB sketch where required
- A recent encumbrance certificate
- Approved layout copy showing your plot number, or the regularisation order
- Site plan, floor plans, sections and elevation signed by the licensed professional
- Structural stability certificate, where the building's category needs one
- NOCs the site needs (for example near an airport, a waterbody or a heritage site)
The plot documents guide explains what each title document proves and where to pull it.
Timelines and fees, honestly
A complete file for an ordinary house typically clears in a few weeks; a query, a missing document or a plot needing another department's clearance can stretch it to months. Fees and charges depend on plot area, built-up area and the local body, and the portal computes them for each application — we deliberately do not quote them, because a remembered figure is how buyers get surprised.
Frequently asked questions
Who approves a building plan for a house in Chennai?
For an ordinary residential building inside the Chennai Metropolitan Area, the application is typically decided by the local body — Greater Chennai Corporation, or the municipality or panchayat the plot falls in — under powers delegated by CMDA. Larger or special buildings go to CMDA itself. Outside the metropolitan area the same rules are administered through DTCP and the local bodies.
Can I apply for building plan approval myself?
You sign as the owner, but the drawings and the application are prepared and filed by a licensed professional — a registered architect, or an engineer or surveyor registered with the local body, depending on the size of the building. Ask them to show their registration before you engage them.
What documents are needed for building plan approval in Chennai?
Typically: the registered sale deed, patta in your name, a recent encumbrance certificate, the approved layout copy showing your plot (or the regularisation order), the site plan and building drawings signed by the licensed professional, and any NOC the site needs. The portal lists the current set for your category.
How long does building plan approval take in Chennai?
Typically a few weeks for a straightforward house with complete papers, and longer when a document is missing, the layout is unapproved, or the plot needs another department's clearance. Tamil Nadu has also introduced a faster self-certification route for small residential buildings — check on the portal whether your plot and building qualify.
What are the fees for building plan approval?
There are scrutiny fees and several charges (development, infrastructure and others) that depend on the plot, the built-up area and the local body. The portal computes them for your application — treat any figure quoted from memory, including ours, as out of date.
Can I start construction before the plan is approved?
No. Building without a permit, or departing from the approved plan, risks a stop-work notice, a demolition order and trouble later with the completion certificate, utility connections, bank loans and resale.
More before-you-build guides
- 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.
- Layout approval check — approved vs unapproved plots — How to verify a layout approval number, confirm your plot is released, and why an unapproved layout is the costly mistake.
- 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.