Tamil Nadu HACA Planning Permission Guide (2026): Revised Rules for Hill Areas

Introduction

Tamil Nadu HACA Planning Permission has been revised under G.O. (Ms.) No. 46 dated 24.02.2026. These revised guidelines simplify approvals for Change of Land Use, Layout Approval, and Building Permission in HACA-covered hill areas. The Hill Areas Conservation Authority (HACA) was originally constituted to regulate development across 43 taluks. Subsequently, its jurisdiction was revised to a village-wise classification, covering 597 revenue villages in 16 districts, replacing the earlier taluk-based system.

To make the planning approval process more efficient, the Government of Tamil Nadu reviewed the existing HACA procedures and introduced significant reforms through G.O. (Ms.) No. 46, dated 24.02.2026. The revised guidelines streamline approvals for Change of Land Use, Layout Applications, and Building Permissions by reducing unnecessary approvals, introducing clear eligibility criteria, and eliminating duplicate No Objection Certificates (NOCs).

As part of these reforms, certain powers of HACA have been delegated to the Directorate of Town and Country Planning (DTCP), applicants are no longer required to obtain an NOC from the Agricultural Engineering Department since the necessary technical parameters are verified by the Geology & Mining Department, and the Revenue Divisional Officer (RDO) NOC has been exempted for all notified Hill Areas, as revenue details are now available through online government records. These measures are intended to simplify the approval process, reduce delays, and ensure faster, more transparent planning permissions while maintaining environmental and planning safeguards.

Revised Procedures for Planning Permission in HACA Areas

A. Sites Located in Hill Stations (Villages Annexed)

1. Change of Land Use

• Up to 2 hectares (urban) and up to 4 hectares (rural) → Processed with the same procedure followed in non-HACA areas.
• Above these limits → Must necessarily be placed before the HACA Committee through the Director of Town and Country Planning.
• NOC required from the Forest Department and the Geology & Mines Department for all change of land use proposals (no area-based exemption for these NOCs).

2. Layout Applications

• Layout applications need not be placed before the HACA Committee for prior clearance.
• NOC required from the Forest Department and the Geology & Mines Department for developments that conform to the land use permissible in the approved Master Plan, and similarly for developments intended in a non-plan area.
• Wherever NOCs have already been obtained at the change-of-land-use stage, they need not be obtained again for layout development.

3. Building Permission

• NOC required from the Forest Department and the Geology & Mines Department for developments that conform to the land use permissible in the approved Master Plan, and similarly for developments intended in a non-plan area.
• NOC from the Forest Department and the Geology & Mines Department is not required if the development is proposed within an already-approved layout.
• Wherever NOCs have already been obtained at the change-of-land-use stage, they need not be obtained again for building development.

B. Sites Located in Areas Other Than Hill Stations (but under HACA jurisdiction)

1. Change of Land Use

• Up to 2 hectares (urban) and up to 4 hectares (rural) → Processed with the same procedure followed in non-HACA areas.
• Above these limits → Must necessarily be placed before the HACA Committee through the Director of Town and Country Planning.
• NOC from the Geology & Mines Department: Not required.
• NOC from the Forest Department: Required for all change of land use proposals.

2. Layout Applications

• Layout applications need not be placed before the HACA Committee for prior clearance.
• NOC from the Geology & Mines Department: Not required.
• NOC from the Forest Department: Required for developments that conform to the land use permissible in the approved Master Plan, and similarly for developments in a non-plan area.
• Wherever NOCs have already been obtained for change of land use, they need not be obtained again for layout development.

3. Building Permission

• NOC from the Geology & Mines Department: Not required.
• NOC from the Forest Department: Required for developments that conform to the land use permissible in the approved Master Plan, and similarly for developments in a non-plan area.
• NOC from the Forest Department is not required if the proposed site falls within an approved layout.
• Wherever NOCs have already been obtained for change of land use, they need not be obtained again for building development.

Applicability

• The revised procedure applies to the notified hill stations listed in the Annexure to G.O. (Ms.) No. 46.
• It also applies to the areas falling under the jurisdiction of the local bodies listed in Column (4) of the Annexure (covering Coimbatore, Dindigul, Tirupattur, Nilgiris, Salem, Tirunelveli, and Theni districts).
• The Director of Town and Country Planning has been directed to implement the order accordingly.

Key Simplifications Introduced

• RDO NOC exempted for all notified Hill Areas.
• Layout applications no longer require prior clearance from the HACA Committee, in either hill-station or non-hill-station HACA areas.
• Geology & Mines Department NOC dispensed with entirely for areas other than hill stations.
• NOC from the Forest and/or Geology & Mines Departments waived where the development is within an already-approved layout.
• Clear area thresholds (2 ha urban / 4 ha rural) for change-of-land-use proposals to be processed like non-HACA areas.
• Avoidance of duplicate NOCs — once obtained at the land-use stage, the same NOC need not be sought again for layout or building permission.

Conclusion

The revised HACA procedures under G.O. (Ms.) No. 46 mark a significant step toward simplifying development approvals in hill and HACA areas. With exemptions such as the removal of the RDO NOC, reduced HACA Committee involvement for layout approvals, and clearer, location-specific NOC requirements, applicants can now navigate the approval process with greater clarity and efficiency. Understanding these revised provisions is essential for ensuring faster approvals and full compliance with the latest planning regulations.