G.O.(Ms).No. 155, Amendments to the Tamil Nadu Combined Development and Building Rules, 2019 (2025)
The Housing and Urban Development [UD4(1)] Department, Government of Tamil Nadu, issued G.O.(Ms).No. 155 dated 8 October 2025 to amend the Tamil Nadu Combined Development and Building Rules, 2019. The amendments introduce requirements for in-building telecommunication infrastructure in certain buildings and telecom utility pipes in plotted layouts. The notification was directed to be published in the Tamil Nadu Government Gazette Extraordinary dated 8 October 2025.
What the document changes
G.O.(Ms).No. 155 dated 8 October 2025 inserts rule 62-A into the Tamil Nadu Combined Development and Building Rules, 2019. It also adds definitions for In-Building Solutions and Telecom Service Providers.
In-Building Solutions means telecommunication infrastructure and associated equipment installed inside a building. Its purposes include high-speed data transmission, better signal coverage, adequate signal strength, reduced interference, optimum spectrum use and fewer call drops.
A Telecom Service Provider is an agency authorised by the Department of Telecommunications, Ministry of Communications, Government of India, to install, operate or maintain telecommunications or information technology services within a building.
Who is affected
The requirements affect owners and applicants for buildings with floor areas above 750 square metres. They also affect developers of plotted layouts and authorised Telecom Service Providers using shared infrastructure within buildings.
For developments containing more than one block, every block other than amenity blocks must have a telecom room corresponding to its floor area.
Building requirements
The required telecom room sizes are:
- More than 750 square metres and up to 1,000 square metres: either a shallow room measuring 0.6 m x 2.6 m or a walk-in room measuring 1.3 m x 1.3 m.
- More than 1,000 square metres and up to 2,000 square metres: 3.0 m x 2.4 m.
- More than 2,000 square metres: 3.0 m x 3.4 m.
Installation spaces for In-Building Solutions must:
- Be protected from flooding.
- Be free from exposure to water, moisture, fumes, gases and dust.
- Have sufficient floor loading capacity for the equipment.
- Be located away from vibration sources that could cause equipment to move or become dislodged.
For buildings with a floor area above 2,000 square metres, the owner or applicant must submit a service plan with the required specifications, certified by a qualified telecom-networking consultant. The owner or applicant must also undertake to make the infrastructure available to all Telecom Service Providers.
Plotted layout requirements
Plotted layouts must include empty large Hume pipes or high-density polyethylene pipes, with a minimum diameter of 0.15 m, along the outer edges of layout roads for telecommunication cables. Layout plans must clearly show the telecom line as utility infrastructure.
This summary is generated from the source document to help you find what is relevant. The PDF above is authoritative. For advice on your own property, use LandLens One or speak to a qualified professional.
Common questions
Does a building of exactly 750 square metres need a telecom room under these amendments?
The stated telecom room requirements begin with buildings having a floor area of more than 750 square metres. The source does not include buildings of exactly 750 square metres in that threshold.
What must I submit for a building larger than 2,000 square metres?
The owner or applicant must submit a service plan containing the required specifications, certified by a qualified telecom-networking consultant. A 3.0 m x 3.4 m telecom room is also specified.
Can the in-building telecom infrastructure be reserved for one service provider?
The owner or applicant must give an undertaking that the In-Building Solutions infrastructure will be available for use by all Telecom Service Providers.
What telecom provision is required in a plotted layout?
Empty large Hume pipes or high-density polyethylene pipes with a minimum diameter of 0.15 m must be laid along the outer edges of layout roads. The telecom line must also be shown as utility infrastructure on the layout plan.
