No Objection Certificate Application System

An online system for Height clearance for buildings and structures around civil airports by Airports Authority of India

Your Application Status


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NOC Applicant Registration

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NOC Committee Member Registration

Attention Applicant: Common Reasons for Rejection – Click Here!

Scheduled system maintenance on 13th July 2024 (Saturday) between 10 AM to 8 PM. NOCAS system will be down for maintenance Kindly plan your activities accordingly. New Guidelines for plot size greater than 5000 sqm and conjoint building w.e.f 27.06.2024. No cheque/demand draft shall be accepted for any payment. Applicants must make payment through NEFT/RTGS only in the AAI Bank Account for offline appeal. Click Here for Account details. The Dashboard Change request shall be applied through NOCAS w.e.f. 02.03.2023 Applicants shall file NOC Revalidation Application through NOCAS w.e.f. 06.03.2023 Guidelines for processing requests for change in Appeal Applications shall be effective from 01.12.2022 NOC for height beyond 55.10 m AMSL and upto 150 m above aerodrome elevation in respect of Navi Mumbai International Airport has been resumed. After applying appeal online, kindly send the original documents to GM (ATM-DoAS), Airports Authority of India, Corporate Head Quarter, Rajiv Gandhi Bhawan, Safdarjung Airport, New Delhi, Pin-110003.

It is mandatory to get your site or structure surveyed from any :-

  1. Licensed Surveyor(s) approved by Local Bodies.
  2. Private Surveyor(s) empanelled and authorised by AAI at the prescribed rates.
  3. Airport Operators at the prescribed rates (From 1st April , 2020)

Prepare the supporting documents as per the
Document Guidelines

Colour Coded Zoning Map (CCZM)

NOC from AAI is not required for a structure below the CCZM height. CCZM of major airports can be accessed in the below formats

Interactive MapView PDF

Approximate Permissible Top Elevation (AMSL)

Before applying for NOC, you may check approximate top elevation (AMSL) of the Proposed Structure

Check Approximate Permissible Top Elevation

Autosettled NOCs

The purposed structures so located, that NOC is not required from AAI, will be auto settled by the system. System gentarted letter, stating the reason of auto settle, will be issued.

Reason of Auto Settle:-

  1. The location of the proposed structure is beyond 20KM from VFR airports or beyond 56 KM from the IFR airports and requested height of proposed structure is equal to or less than 150m above ground level(AGL).
  2. For airports /cities where Colour Coded Zoning Map (CCZM) have been issued, the proposed structure top elevation (AMSL), is below the CCZM permitted top elevation. Permitted height of the structure = CCZM permitted top elevation - Site Elevation.
  3. For the SACFA Mast upto 100m and beyond 20km from the Aerodrome Reference Point (ARP) of IFR airports or beyond 10km from VFR airports.

Issued NOCs

Any member of the public, airport operator and the Local Bodies/ Municipal Corporations can view NOC issued by AAI without Login.

Review, Appeal & Revalidation

if the applicant is not satisfied with the NOC height then he can apply for reveiw/appeal and if the issued noc is going to expired then he can apply to revalidation.

Read About Process

Requirement of Documents

Applying for NOC is a paperless process. However, you have to upload scanned copies of some documents while applying online. To get the requirements, please select the type of structure, you wish to apply the NOC for, from the list below.

  • Buildings

  • Chimneys

  • Flyovers

  • Cranes

  • Bill Boards

  • Wind Turbines

  • Power Transmission Lines

  • SACFA Wireless Comm. Mast

Requirements for - Buildings

Requirements for - Chimneys

Requirements for - Flyovers

Requirements for - Cranes

Requirements for - Bill Boards

Requirements for - Wind Turbines

Requirements for - Power Transmission Lines

Requirements for - SACFA Wireless Communication Mast

NOCAS is an online application system for height clearance of buildings & structures in-and-around airports by Airports Authority of India.

Applicant has to register first & then login to apply. Please go through sections below to know details about the application procedure & requirements.

  • How to apply
  • Document Guidelines
  • Check Before Applying
  • Track Application Status
  • FAQs
  • Public Information

Latest Updates