We found no AAI form called height modification. To change the height of an existing AAI NOC, you file a review once with Undertaking 1D, or appeal to the Appellate Committee. This guide shows which route fits, with steps, documents and a worked example. See also AAI NOC validity and revalidation. AAI NOC Height Modification […]
AAI NOC Validity and Revalidation: Rules, Process and Deadlines
An AAI NOC is valid for 8 years from the date of issue and can be extended to a maximum of 12 years from issue under Rule 9A. Revalidation is not automatic: it needs construction to have started and a request made in time. For the full process, see our guide to AAI NOC for […]
Defence NOC or AAI NOC? Decision Flowchart (2026)
Whether you need a defence NOC or an AAI NOC depends on what stands near your site: a civil airport, a military airfield, a defence establishment, or a mix. This decision flowchart gives the answer in just a few minutes. For a detailed side-by-side table, read our defence NOC vs AAI NOC comparison. Quick Answer […]
Wrong Coordinates or Elevation: Why Your NOC Gets Rejected or Void
Wrong coordinates or elevation can get your AAI NOC rejected, or make an issued NOC null and void later. AAI calculates your permitted height from the data you submit, so one error can undo the approval. Here are the common mistakes and fixes, starting with a proper site elevation survey for airport NOC. Quick Answer […]
AAI NOC Objection Reply: Format and Examples (2026)
An AAI NOC objection reply is the written response you file when AAI rejects your application or grants less height than you asked for. Below are the routes (resubmission, review and appeal), ready-to-edit formats and examples. To avoid the problem first, see the common airport NOC rejection reasons. Quick Answer AAI has no single form […]
Do You Need an AAI NOC? 5-Minute Checklist (2026)
You need an AAI NOC only if your site is inside the regulated zone around an airport and your top elevation exceeds the limit permitted for your grid. This 5-minute checklist shows exactly how to check your plot, step by step. New to the topic? Start with our guide on what is AAI NOC and […]
What Is AAI NOC and Who Needs It? (Complete India Guide 2026)
AAI NOC is the No Objection Certificate from the Airports Authority of India that confirms your building, tower or other structure will not obstruct flight paths near an airport. Whether you need one depends on your site’s distance and height, which an airport NOC survey establishes before filing. AAI NOC at a Glance Item Detail […]
Building Height Restriction Near Airport: A Builder’s Guide
A building height restriction near airport applies to any site within 20 km of a VFR airport or 56 km of an IFR airport, measured from the Aerodrome Reference Point (ARP). Your maximum height is the Permissible Top Elevation (PTE) set by AAI minus your site’s ground elevation. You need an AAI NOC before construction […]
AAI NOC vs DGCA Clearance
AAI NOC vs DGCA Clearance — What’s the Difference? Ask ten people involved in construction near an Indian airport what DGCA clearance means, and you will likely get ten different answers. Some call it a separate approval. Others use it interchangeably with the AAI NOC. In reality, neither is fully correct, and this confusion causes […]
What is GSR 751(E)? Complete Guide to Airport NOC Rules in India
What is GSR 751(E)? Complete Guide to Airport NOC Rules in India [IMAGE SUGGESTION 1: Featured image — an aircraft on final approach over a city skyline with a building height clearance overlay graphic. Alt text: “GSR 751(E) airport NOC rules explained — height restriction zones around Indian airports”] Are you building anything taller than […]