G.O. (Ms.) No. 154, Amendments to the Tamil Nadu Combined Development and Building Rules, 2019, 2025
The Housing and Urban Development Department issued G.O. (Ms.) No. 154 dated 7 October 2025 to amend the Tamil Nadu Combined Development and Building Rules, 2019. It replaces the cottage industry category with White Industries, updates the industrial categories and planning parameters, and reduces the minimum road width from 7 metres to 6 metres for White and Green Industries in Peri urban Village Panchayat and Village Panchayat areas.
What the amendment changes
G.O. (Ms.) No. 154 dated 7 October 2025, issued by the Housing and Urban Development Department, changes how industries are categorised and regulated 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” in rule 35 is replaced with “White Industries”.
- The industrial parking reference in Annexure IV is 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 are substituted with lists for the four industrial categories.
- The categories remain 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 controls
G.O. (Ms.) No. 154 sets the following minimum road widths for industrial sites:
- In Corporations, Municipalities and Town Panchayats, the minimum road width is 7 metres for White, Green, Orange and Red Industries.
- In Peri urban Village Panchayat and Village Panchayat areas, the minimum is 6 metres for White and Green Industries, and 7 metres for Orange and Red Industries.
The normally permissible Floor Space Index is 2 for all four categories, and the maximum building height is 18.30 metres. Water tanks, chimneys and specified architectural or ornamental features not intended for human habitation may be permitted up to 30.50 metres from ground level. If the total height exceeds 30.50 metres, a No Objection Certificate from the Airport Authority of India must be furnished.
There is no restriction on plot coverage. Parking must follow Annexure IV, rainwater harvesting must follow Annexure XXII, and land required for community recreation must be provided under rule 41.
Who should check the amendment
G.O. (Ms.) No. 154 is relevant to landowners, buyers, developers and industrial applicants proposing White, Green, Orange or Red Industries. Particular attention is needed for industrial land in Village Panchayat areas, because the 6 metre road standard applies only to White and Green Industries. The supplied text also lists many White Industries, including assembly, dry process fabrication, packing, repair, handicraft, information technology and small food service activities, subject to the stated descriptions and limits.
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Common questions
Can a White Industry be located on a 6 metre road in a Village Panchayat area?
Yes. G.O. (Ms.) No. 154 specifies a minimum road width of 6 metres for White Industries in Peri urban Village Panchayat and Village Panchayat areas.
Does the 6 metre road standard also apply to Orange and Red Industries?
No. Orange and Red Industries require a minimum road width of 7 metres in Peri urban Village Panchayat and Village Panchayat areas.
What is the maximum industrial building height under the amendment?
The maximum building height is 18.30 metres. Certain water tanks, chimneys and architectural or ornamental features not intended for human habitation may be permitted up to 30.50 metres from ground level.
Are the White, Green, Orange and Red classifications fixed permanently?
No. The industrial categories in Annexures V, VI, VII and VIII are subject to orders issued from time to time by the Environment, Climate Change and Forests Department or the Tamil Nadu Pollution Control Board.
