G.O. (Ms.) No. 154, Amendments to Tamil Nadu Combined Development and Building Rules, 2019, 2025

What the amendment changes

G.O. (Ms.) No. 154, dated 7 October 2025, issued by the Housing and Urban Development [UD4(1)] Department, revises the treatment of industrial development under the Tamil Nadu Combined Development and Building Rules, 2019. The appended notification was directed to be published in the Tamil Nadu Government Gazette, Extraordinary, dated 7 October 2025.

The main changes are:

• The expression "cottage industries" is replaced by "White industries" in the relevant development provision.
• The parking standards in Annexure IV are similarly changed from "Cottage Industries" to "White Industries".
• Planning parameters are provided for White, Green, Orange and Red Industries.
• Annexures V, VI, VII and VIII, which contain the industrial category lists, are substituted.
• Industrial categorisation remains subject to orders issued from time to time by the Environment, Climate Change and Forests Department or the Tamil Nadu Pollution Control Board.

Road width and building standards

The amended Tamil Nadu Combined Development and Building Rules, 2019 prescribe the following minimum road widths:

• In Corporation, Municipality and Town Panchayat areas, White, Green, Orange and Red Industries each require a 7 metre road.
• In Peri-Urban Village Panchayat and Village Panchayat areas, White and Green Industries require a 6 metre road.
• In Peri-Urban Village Panchayat and Village Panchayat areas, Orange and Red Industries continue to require a 7 metre road.

For all four industrial categories, the table states a maximum building height of 18.30 metres and a normally permissible Floor Space Index of 2. There is no restriction on plot coverage. Parking must be provided within the site according to Annexure IV, rainwater harvesting must follow Annexure XXII, and required land for parks or playgrounds must follow rule 41.

Incidental structures such as gate pillars, servant rooms, watchman booths, cycle stands and toilets may be placed within prescribed setback spaces if they do not exceed 4 metres in height or occupy more than one-third of the length of any one side of the site.

Who should check the amendment

The revised rules directly affect owners, buyers, developers and professionals dealing with industrial land or buildings, particularly in Peri-Urban Village Panchayat and Village Panchayat areas. Before relying on the reduced road width, they should confirm that the proposed activity falls within the White or Green category under the applicable industrial classification.

The substituted White Industries list includes activities such as dry-process electrical and electronic assembly, fly ash brick manufacturing, medical oxygen, solar power generation, agarbathi manufacturing, fish net manufacturing without dyeing, sports goods and non-bedded health care establishments.