G.O.(Ms).No. 154, Amendments to the Tamil Nadu Combined Development and Building Rules, 2019
The Governor of Tamil Nadu, through the Housing and Urban Development [UD4(1)] Department, issued G.O.(Ms).No. 154 dated 7 October 2025, amending the Tamil Nadu Combined Development and Building Rules, 2019. The amendments classify industries as White, Green, Orange or Red and reduce the minimum road width for White and Green industries in Peri-urban Village Panchayat and Village Panchayat areas from 7 metres to 6 metres.
What the amendment does
G.O.(Ms).No. 154 dated 7 October 2025, issued by the Housing and Urban Development [UD4(1)] Department, changes the planning standards and industry categories 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 amendment replaces references to cottage industries with White industries in rule 35 and in the industrial parking provisions of Annexure IV. It also replaces the planning parameters in rule 36 and substitutes the industry lists in Annexures V, VI, VII and VIII.
Who may be affected
The amended Tamil Nadu Combined Development and Building Rules, 2019 affect owners, buyers, developers and businesses dealing with land or buildings intended for White, Green, Orange or Red industries. The location of the property matters because minimum road width differs between urban local body areas and village panchayat areas.
The industry categories in the annexures remain subject to categorisation orders issued from time to time by the Environment, Climate Change and Forests Department or the Tamil Nadu Pollution Control Board.
Main planning standards
Key provisions include:
- In Corporation, Municipality and Town Panchayat areas, the minimum road width is 7 metres for all four industry categories.
- In Peri-urban Village Panchayat and Village Panchayat areas, the minimum road width is 6 metres for White and Green industries, and 7 metres for Orange and Red industries.
- The maximum building height is 18.30 metres for all four categories.
- The normally permissible Floor Space Index is 2 for all four categories.
- The table prescribes front, side and rear setbacks according to the industry category and, for some front setbacks, the width of the adjoining road.
- There is no restriction on plot coverage.
- Parking must comply with Annexure IV, and rainwater harvesting must comply with Annexure XXII.
- Land reservation for parks or playgrounds must follow rule 41.
Additional structures and height
The amended rule allows gate pillars, servant rooms, watchman booths, cycle stands and toilets within prescribed setback spaces. Their height must not exceed 4 metres, and they must not occupy more than one-third of the length of any one side of the site.
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.
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Common questions
Can a White industry in a Village Panchayat be approached by a 6 metre road?
Yes. In a Peri-urban Village Panchayat or Village Panchayat area, the minimum road width for a White industry is 6 metres.
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 are the permitted height and Floor Space Index for industrial buildings?
For White, Green, Orange and Red industries, the maximum building height is 18.30 metres and the normally permissible Floor Space Index is 2.
Are industry classifications fixed permanently by this amendment?
No. The categories listed 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.
