Tamil Nadu raises low-rise building height ceiling to 19.5 m

Tamil Nadu has raised the maximum height of specified non-high-rise buildings from 18.3 metres to 19.5 metres, an increase of 1.2 metres. The change came through G.O. (Ms) No. 194, issued by the Housing and Urban Development department on Monday, 26 October 2026, which amends the Tamil Nadu Combined Development and Building Rules, 2019 (TNCDBR).

The order makes twenty separate amendments across fourteen pages. It applies statewide. Under the revised provisions, stilt plus five floors or ground plus five floors are specified for the relevant building categories, subject to conditions. A building counts as high-rise only above 19.5 metres.

What changes for sites and projects

In Residential and Primary Residential zones of a Master Plan or Detailed Development Plan, a site that abuts and takes access from a road of 12 metres or wider is now deemed to be zoned Commercial. The 2019 rule used 18 metres. For the Chennai Metropolitan Area the road-width test is 12 metres. Elsewhere in Tamil Nadu, the threshold is 9 metres.

The order keeps the existing FSI limits: 2.0 on 12-metre roads, 2.5 on 15-metre roads and 3.25 on 18-metre roads. The taller height limit therefore does not add floors on its own. Total built area still depends on the FSI that applies to the road and plot.

The order also says the revised height limit does not override other development regulations. Projects must still meet the road-width, FSI and setback requirements that apply to them.

• Accessibility provisions for persons with disabilities, elderly people and children must be complied with before a Completion Certificate is issued, including washbasin and toilet grab-bar norms.
• Parking requirements for information technology offices have been reduced.
• Podiums of up to 15 metres are permitted for high-rise buildings, subject to setback and parking norms.
• EV charging infrastructure is required in specified residential buildings, with fast-charging provision for visitor parking in buildings with more than 50 dwelling units.
• Open kitchens opening directly into living or dining spaces are permitted under specified conditions.

Chennai's southern aquifer zone

In the Restricted Development Zone of the Aquifer Recharge Area, from Kottivakkam to Uthandi on the city's southern side, buildings can now go up to 14 metres. The order also permits additional categories of development in that zone. Buyers in the stretch should check the specific zoning of a plot before assuming it falls under the new terms.

Kirlosh Kumar, Secretary of the Housing and Urban Development department, said the higher limit would let developers plan higher ceilings and improve building design.

For buyers, the practical effect is in project design and approvals rather than in prices. Developers may plan taller ground-floor and stilt spaces, and the accessibility condition will apply before completion certificates. Buyers should ask for the approved plan and the completion certificate timeline before booking. For developers, the revised road-width test may open more sites to commercial use, but each project must still work within FSI and setback limits.

The number to watch is the FSI cap. A taller building only adds saleable area if the FSI on that road allows it, so the 2.0, 2.5 and 3.25 limits will decide how many floors projects can actually build.