CRZ Zone Check

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CRZ Zone Check

Accurate CRZ verification tool for Tamil Nadu. Click anywhere on the map to instantly check if a location falls within CRZ-1A, CRZ-1B, CRZ-2, CRZ-3A, CRZ-3B, CRZ-4A, or CRZ-4B zones. Get precise NDZ distances, zone-specific regulations, and environmental clearance requirements.

Data Source: CRZ boundary datasets including all sub-categories and mangrove buffer zones. Updated as per CRZ Notification 2019.

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Our expert team specializes in obtaining environmental clearances for coastal projects. Get professional assistance with CRZ approvals, documentation, and compliance.

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Click anywhere on the map to check CRZ zone
CRZ Categories
CRZ-I (Ecologically Sensitive)
CRZ-II (Built-up Area)
CRZ-III (Rural Area)
CRZ-IV (Water Area)

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CRZ Zone Status
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CRZ Category -
Zone Type -
Distance to CRZ -
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Complete Guide to Coastal Regulation Zones (CRZ)

What is a Coastal Regulation Zone (CRZ)?

Coastal Regulation Zone (CRZ) refers to the coastal stretches of seas, bays, estuaries, creeks, rivers, and backwaters which are influenced by tidal action up to 500 meters from the High Tide Line (HTL) on the landward side. For tidal influenced water bodies, CRZ extends up to 50-100 meters or width of the creek, whichever is less.

Purpose of CRZ Regulations
  • Protect coastal environment and marine ecology
  • Ensure livelihood security of fishing and local communities
  • Promote sustainable development in coastal areas
  • Conserve and protect coastal stretches and marine areas
Detailed CRZ Categories (As per CRZ Notification 2019)

The coastal areas are classified into four distinct categories based on ecological sensitivity and development:

CRZ-I: Ecologically Sensitive and Important Areas

CRZ-I A: Ecologically Sensitive Areas

  • Mangroves (if area more than 1000 sq.m, buffer of 50m along mangroves)
  • Coral reefs and coral formations
  • Sand dunes
  • Biologically active mudflats
  • Salt marshes
  • Turtle nesting grounds
  • Bird nesting and feeding areas
  • Marine parks and sanctuaries

CRZ-I B: Inter-tidal Zone

  • Area between Low Tide Line (LTL) and High Tide Line (HTL)
  • Most restricted zone for any development
Regulations: No new construction except pipelines, transmission lines, and facilities essential for activities permissible under CRZ-I
CRZ-II: Developed/Built-up Areas

Areas within municipal limits or legally designated urban areas which are substantially built-up (more than 50% developed)

  • Existing authorized structures allowed
  • Construction on landward side of existing roads/buildings permitted
  • No construction on seaward side of existing roads
  • Reconstruction of authorized buildings permitted
FSI/FAR Limits in CRZ-II:
  • Normal Buildings: FSI of 1.5
  • Multi-Storeyed Buildings (MSB)/High-rise: FSI of 2.25
  • As per approved Town Planning schemes
CRZ-III: Rural/Undeveloped Areas

CRZ-III A: Densely Populated Rural Areas

  • Population density > 2161 persons per sq.km (2011 Census)
  • No Development Zone (NDZ): 50 meters from HTL
  • Construction of dwelling units allowed beyond NDZ for traditional communities
  • Land use as per approved CZMP

CRZ-III B: Other Rural Areas

  • Population density ≤ 2161 persons per sq.km
  • No Development Zone (NDZ): 200 meters from HTL
  • In NDZ 0-200m: No construction except for agriculture, horticulture, gardens, pastures, parks, play fields
  • Beyond 200m: Construction permitted with restrictions
  • Tourism projects allowed beyond 200m with conditions
Note: FSI/FAR in CRZ-III areas shall be as per local Town and Country Planning Regulations
CRZ-IV: Water Areas

CRZ-IV A: Territorial Waters (12 nautical miles)

  • Area from Low Tide Line to 12 nautical miles seaward
  • Traditional fishing allowed
  • No untreated sewage/effluent discharge

CRZ-IV B: Water Bodies Influenced by Tidal Action

  • Bays, estuaries, rivers, creeks, backwaters, lagoons
  • No untreated discharge permitted
  • Traditional fishing and related activities allowed
Key Definitions

High Tide Line (HTL): The line on the land up to which the highest water line reaches during the spring tide

Low Tide Line (LTL): The line on the land up to which the lowest water line reaches during the spring tide

No Development Zone (NDZ): Area from HTL where no construction is permitted

FSI/FAR: Floor Space Index/Floor Area Ratio for construction

CZMP: Coastal Zone Management Plan

CZMA: Coastal Zone Management Authority

Need Environmental Clearance?

Before undertaking any development within CRZ areas, it is mandatory to obtain environmental clearance. Our team assists you in complying with all CRZ norms efficiently.

  • Verification of CRZ classification for your plot
  • Documentation & compliance filing
  • Expert consultation with coastal zone management experts
  • Liaison support for faster approvals
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Important Points to Remember
🚫 Prohibited Activities in All CRZ Areas:
  • Setting up new industries and expansion of existing industries
  • Manufacture, handling, storage or disposal of hazardous substances
  • Setting up fish processing units (except in designated areas)
  • Land reclamation and bunding (except for specific purposes)
  • Disposal of plastic and untreated waste/effluents
  • Mining of sand, rocks, and substrata materials
  • Groundwater withdrawal within 200m of HTL (with exceptions)
✅ Permissible Activities (with conditions):
  • Measures for conservation and management of marine environment
  • Construction of trans-harbour sea links and roads on stilts
  • Pipelines and transmission lines crossing CRZ areas
  • Weather radar stations and facilities for disaster management
  • Salt harvesting and desalination plants (with conditions)
  • Storage of non-hazardous cargo at ports
  • Eco-tourism activities (as per guidelines)
Quick Reference Table
CRZ Zone Description NDZ Distance FSI Limit Key Restriction
CRZ-I A Ecologically Sensitive 50m buffer for mangroves Not Applicable No new construction
CRZ-I B Inter-tidal Zone Entire zone Not Applicable Most restricted area
CRZ-II Built-up Urban Existing development line 1.5 (Normal) / 2.25 (MSB) No seaward construction
CRZ-III A Dense Rural 50 meters As per local norms No construction in NDZ
CRZ-III B Sparse Rural 200 meters As per local norms No construction in NDZ
CRZ-IV A Sea Area Not Applicable Not Applicable No untreated discharge
CRZ-IV B Tidal Water Bodies Not Applicable Not Applicable No untreated discharge
Process for CRZ Clearance
  1. Check CRZ Category: Use this tool to identify the CRZ zone of your property
  2. Prepare Project Details: Compile project specifications, site plans, and environmental impact assessment
  3. Apply to CZMA: Submit application to Tamil Nadu Coastal Zone Management Authority
  4. Public Hearing: For projects requiring EIA, public hearing is mandatory
  5. Expert Appraisal: Technical review by Expert Appraisal Committee
  6. Clearance: Final approval from State or Central authority based on project scale
Special Provisions
For Local Communities:
  • Traditional fishing communities have unrestricted rights in all CRZ areas
  • Local inhabitants can reconstruct/repair dwelling units (max 2 floors/9m height)
  • Traditional boat building yards are permitted
  • Community facilities like schools, dispensaries, public rain shelters allowed
How to Use This Tool

Our CRZ Check Tool provides instant verification:

  1. Interactive Map: Click anywhere to check CRZ status
  2. GPS Location: Use current location button for your present position
  3. Search Function: Enter address or coordinates to find specific locations
  4. Detailed Results: Get zone category, NDZ distance, and applicable regulations
  5. Visual Boundaries: See actual CRZ boundary overlays on the map
Accuracy Note: For legal purposes, always verify with the Tamil Nadu Coastal Zone Management Authority (TNCZMA).
Frequently Asked Questions

Yes, but with restrictions: In CRZ-II, construction is allowed on landward side of existing approved roads or structures. In CRZ-III, construction is allowed beyond NDZ (50m for III-A, 200m for III-B). Local communities can reconstruct existing dwelling units with permission.

CRZ-II FSI limits: Normal buildings: 1.5 FSI | Multi-Storeyed Buildings (MSB)/High-rise: 2.25 FSI | Subject to local town planning regulations.

It depends on the CRZ category: CRZ-III A: minimum 50m from HTL | CRZ-III B: minimum 200m from HTL | CRZ-II: depends on existing development | CRZ-I: generally no new construction allowed.
Disclaimer

This CRZ information tool is based on CRZ Notification 2019 guidelines. While we strive for accuracy, official approvals require verification from the Tamil Nadu Coastal Zone Management Authority (TNCZMA). Always consult with TNCZMA and obtain proper clearances before initiating any construction or development activities in coastal areas.