Kochi Air Funnel Zones
AAI
Overview
Kochi Airport height restriction zone rules apply to every plot within 20 km of Cochin International Airport (IATA: COK, ICAO: VOCI), operated by Cochin International Airport Limited (CIAL) at Nedumbassery, about 25 km northeast of downtown Kochi. AAI has published a dedicated Colour Coded Zoning Map (CCZM) for Cochin Airport, prepared under GSR 751(E). Crucially, this CCZM explicitly excludes the jurisdiction of the Naval Airfield, Kochi. That means plots near INS Garuda face a second, independent set of defense authority restrictions on top of the AAI rules.
Why Kochi Has a Dual Jurisdiction Problem That Most Buyers Near Ernakulam Never Hear About
Runway Strip (No-build)
Distance Reference
0–500 m from runway edge
Max Permitted Height
No construction
Approving Authority
N/A
Inner Horizontal Surface
Distance Reference
Up to 4 km from ARP
Max Permitted Height
45 m AGL
Approving Authority
AAI NOC mandatory
Airport Funnel (Approach path)
Distance Reference
Along runway 27/09 approach
Max Permitted Height
2% of distance from runway edge
Approving Authority
AAI NOC mandatory
Conical Surface
Distance Reference
4–8 km approx.
Max Permitted Height
Increases 1 m per 20 m of distance
Approving Authority
AAI NOC mandatory
Outer Horizontal Surface
Distance Reference
Up to 15 km from ARP
Max Permitted Height
Up to 300 m AMSL
Approving Authority
AAI NOC mandatory
Peripheral Zone
Distance Reference
15–20 km
Max Permitted Height
No hard cap, monitored
Approving Authority
AAI NOC mandatory
Naval Airfield Zone (INS Garuda)
Distance Reference
Kochi city area
Max Permitted Height
Separate, not in CCZM
Approving Authority
Defence authorities
Zone
Distance Reference
Max Permitted Height
Approving Authority
Runway Strip (No-build)
0–500 m from runway edge
No construction
N/A
Inner Horizontal Surface
Up to 4 km from ARP
45 m AGL
AAI NOC mandatory
Airport Funnel (Approach path)
Along runway 27/09 approach
2% of distance from runway edge
AAI NOC mandatory
Conical Surface
4–8 km approx.
Increases 1 m per 20 m of distance
AAI NOC mandatory
Outer Horizontal Surface
Up to 15 km from ARP
Up to 300 m AMSL
AAI NOC mandatory
Peripheral Zone
15–20 km
No hard cap, monitored
AAI NOC mandatory
Naval Airfield Zone (INS Garuda)
Kochi city area
Separate, not in CCZM
Defence authorities
The CIAL runway 27/09 is 3,445 m long and oriented east-west. Its funnel zones extend toward Angamaly and Sreemoolanagaram in one direction and toward Kanjoor in the other. If your plot sits along either of those corridors, the funnel zone ceiling is the binding constraint, not the inner horizontal surface limit.
Nedumbassery, Angamaly and the Athani Corridor: Where the AAI Ceiling Bites Hardest and Where Metro Access Is Shifting Values
Nedumbassery
Approx. Distance from CIAL ARP
0-2 km
Primary Zone Risk
Inner horizontal surface / funnel zone
Key Demand Driver
Airport employment, CIAL Aerotropolis
Sreemoolanagaram / Kanjoor
Approx. Distance from CIAL ARP
Adjacent to runway
Primary Zone Risk
Funnel zone: extreme restriction
Key Demand Driver
Runway panchayat areas
Angamaly
Approx. Distance from CIAL ARP
4-6 km
Primary Zone Risk
Conical surface / funnel overlap
Key Demand Driver
NH 544 connectivity, railway station
Aluva
Approx. Distance from CIAL ARP
10-12 km
Primary Zone Risk
Outer horizontal surface
Key Demand Driver
Kochi Metro terminus, industrial base
Athani
Approx. Distance from CIAL ARP
8-10 km
Primary Zone Risk
Outer horizontal surface
Key Demand Driver
Kochi Metro Phase III corridor 1
Corridor / Locality
Approx. Distance from CIAL ARP
Primary Zone Risk
Key Demand Driver
Nedumbassery
0-2 km
Inner horizontal surface / funnel zone
Airport employment, CIAL Aerotropolis
Sreemoolanagaram / Kanjoor
Adjacent to runway
Funnel zone: extreme restriction
Runway panchayat areas
Angamaly
4-6 km
Conical surface / funnel overlap
NH 544 connectivity, railway station
Aluva
10-12 km
Outer horizontal surface
Kochi Metro terminus, industrial base
Athani
8-10 km
Outer horizontal surface
Kochi Metro Phase III corridor 1
The most misread corridor is Athani. Kochi Metro Phase III proposes two corridors: Aluva to Kochi Airport via Athani (Corridor 1) and Athani to Angamaly (Corridor 2), with CIAL expected to fund part of a 3 km underground link at Nedumbassery. Brokers pitch Athani as a pure metro-appreciation play. It still sits within the 20 km NOC radius. Verify your CCZM grid and get the Permissible Top Elevation for the exact survey number before paying the advance.
One more factor specific to Kochi: CIAL is actively developing the aerotropolis on 202 hectares in Nedumbassery and nearby villages, including a Special Economic Zone, an IT Park, and an Aero City phase. The first phase of CIAL Aero Park was inaugurated in February 2026. Any commercial plot marketed near that zone carries both the premium of the aerotropolis narrative and the hard ceiling of AAI's funnel zone. The two do not cancel each other out.
Frequently Asked Questions
Do I need an AAI NOC to build near the Kochi airport?
Yes. Every structure within 20 km of CIAL's Aerodrome Reference Point requires an AAI height clearance NOC under GSR 751E before construction. No exemptions exist for plot size or structure type.
Does Kochi Airport have an official AAI Colour Coded Zoning Map?
Yes. AAI has published a CCZM for Cochin airport under GSR 751(E). The map explicitly states it covers only CIAL's obstacle limitation surfaces and excludes the Naval Airfield Kochi jurisdiction entirely.
Does the Naval Airfield Kochi create additional height restrictions beyond the AAI CCZM?
Yes. INS Garuda is a separate airfield. The AAI CCZM for Cochin does not cover its jurisdiction. For plots near Kochi city within INS Garuda's zone, you need a separate NOC from defense authorities.
What is the airport funnel zone, and how does it affect Angamaly and Nedumbassery plots?
The funnel zone runs along runway 27/09 approach and departure paths, covering Angamaly, Sreemoolanagaram, and Kanjoor corridors. Permitted height equals 2% of the plot's distance from the runway edge.
How is the permitted building height calculated for a plot near Cochin airport?
AAI measures height in AMSL. Subtract your site's ground elevation from the CCZM Permissible Top Elevation to get the AGL ceiling. Apply online via NOCAS at nocas2.aai.aero using WGS84 plot coordinates.
What happens if a building near Kochi airport violates the AAI height restriction?
Violation of GSR 751E can result in denial of Occupancy Certificate, AAI show-cause notices, and court-ordered demolition of non-compliant floors. The buyer inherits the legal and financial liability after registry.
Can I build a multi-floor apartment near Kochi Metro Phase III Athani corridor?
Only after verifying your CCZM grid through NOCAS. Athani falls within the 20 km NOC radius of CIAL. Metro connectivity does not override AAI's OLS height ceiling, which is fixed by your survey number's AMSL elevation.
How do I apply for the height NOC for a plot near Cochin International Airport?
Apply through NOCAS at nocas2.aai.aero. Submit WGS84 coordinates and your certified site elevation in AMSL. AAI's designated NOC office processes the application; the NOC remains valid for eight years once issued.
Disclaimer
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Data Source & Verification
Source
Official Airports Authority of India (AAI) / Directorate General of Civil Aviation (DGCA) documents
Official Website
aai.aero
Coordinate Reference System
EPSG:4326 (WGS 84)
Geometry Type
Polygon / MultiPolygon
Data Format
Raster Tiles (from GeoTIFF)
Last Verified
2026
Status
Active