Mumbai Air Funnel Zones: Building Height Restrictions
AAI
Overview
Mumbai airport funnel zone restrictions are among the most consequential in India. The color coded zoning map for Mumbai and Navi Mumbai, published by AAI under Gazette of India Statutory Rules (GSR) 751(E), 2015 and updated in June 2016, governs permissible building height across a 20 km radius of Chhatrapati Shivaji Maharaj International Airport. The airport sits in Vile Parle East at 14 m above mean sea level (AMSL) and operates two intersecting runways: the primary runway 09/27 (3,445 m) and the secondary runway 14/32 (2,871 m). At 4 km from the airport, buildings above just 17.87 m require AAI approval, the lowest threshold of any major Indian city.
Why Mumbai's Colour Coded Zoning Map (CCZM) Bites Harder Than Any Other Indian City's
Mumbai is the sharpest example of what happens when an airport is embedded inside a dense urban core. The funnel zone has been in place since 1928, virtually covering 50% of suburban Mumbai, including Vile Parle, Andheri, Kurla, and Santacruz. In Navi Mumbai, 65% of the area, including Ulwe, Chinchpada, Khandeshwar, and Mansarovar, falls inside the funnel zone of the upcoming Navi Mumbai International Airport (IATA: NMI, ICAO: VANM), which commenced commercial operations on 25 December 2025.
Permitted Building Heights by Funnel Zone Surface
The table below shows how permitted building height thresholds in Mumbai compare to the funnel zone structure across the key obstacle limitation surfaces around runway 09/27.
Approach / Funnel Surface
Distance from CSIA Runway
Along runway 09/27 axis, up to ~9 km
Mumbai Height Threshold
2% of distance from runway edge
AAI NOC Required?
Mandatory in all cases
Inner Horizontal Surface
Distance from CSIA Runway
Within ~4 km of runway ends
Mumbai Height Threshold
17.87 m (approx. 5–6 floors)
AAI NOC Required?
Yes, above this threshold
Conical Surface
Distance from CSIA Runway
4–15 km from Aerodrome Reference Point (ARP)
Mumbai Height Threshold
Rises gradually; varies by grid
AAI NOC Required?
Depends on CCZM grid colour
Outer Zone
Distance from CSIA Runway
15–20 km from ARP
Mumbai Height Threshold
More permissive; local MCGM bylaws
AAI NOC Required?
Required only if building exceeds CCZM PTE
Zone Type
Distance from CSIA Runway
Mumbai Height Threshold
AAI NOC Required?
Approach / Funnel Surface
Along runway 09/27 axis, up to ~9 km
2% of distance from runway edge
Mandatory in all cases
Inner Horizontal Surface
Within ~4 km of runway ends
17.87 m (approx. 5–6 floors)
Yes, above this threshold
Conical Surface
4–15 km from Aerodrome Reference Point (ARP)
Rises gradually; varies by grid
Depends on CCZM grid colour
Outer Zone
15–20 km from ARP
More permissive; local MCGM bylaws
Required only if building exceeds CCZM PTE
The 17.87 m threshold at 4 km is the number every buyer must carry. In Vijayawada, the same distance from the airport allows buildings up to 42.14 m before AAI approval is needed. In Mumbai, a five- to six-story building triggers a mandatory NOC. The old AAI ATC tower at CSIA itself was demolished in 2014 because it penetrated runway 14/32's transitional obstacle limitation surfaces by over 50 meters. If AAI acted against its own infrastructure for a height violation, it will act against yours. Confirm the CCZM grid color and permitted top elevation for your plot before you approach any lender or sign any agreement.
Santacruz to Ulwe: Where Mumbai's Funnel Zone Suppresses Value and Where It Creates Opportunity
Mumbai's funnel zone is not a uniform constraint. It creates a specific set of winners and losers depending on where you are and what you intend to build. The Maharashtra government's April 2025 amendment to DCPR-2034 introduced Transferable Development Rights (TDR) for funnel zone redevelopment, reported to affect an estimated 6,000 buildings and 3.5 lakh tenants (figures cited in media coverage of the amendment; primary notification text does not cite specific building counts) in Vile Parle, Santacruz, Kurla, and Ghatkopar.
The table below maps key Mumbai and Navi Mumbai corridors against their funnel zone constraint profile.
Vile Parle / Santacruz
Airport Distance
0-3 km (immediate vicinity, CSIA)
Constraint Level
Very High (approach funnel)
Growth Driver
Metro Line 3 access; established residential demand
Key Risk
Height cap at ~17.87 m; redevelopment relies on TDR under DCPR-2034
Andheri / Kurla
Airport Distance
2-6 km (CSIA zone)
Constraint Level
High
Growth Driver
BKC adjacency; commercial corridor
Key Risk
AAI towers in Andheri under relocation; check individual grid before buying
Ghatkopar
Airport Distance
~8-10 km (southeast of CSIA)
Constraint Level
Moderate
Growth Driver
Metro Line 1 hub; eastern suburbs growth
Key Risk
Conical surface zone; Floor Space Index (FSI) up to 2.7 but TDR may be needed for full utilisation
Ulwe / Panvel
Airport Distance
0-5 km (NMIA approach, runway 08/26)
Constraint Level
Very High (new airport, northeast-southwest approach)
Growth Driver
NMIA opened December 2025; Atal Setu / MTHL connectivity
Key Risk
CCZM for NMIA not yet aligned with full build-out; verify plot-level grid before committing
Khandeshwar / Mansarovar (Navi Mumbai)
Airport Distance
5-12 km (NMIA zone)
Constraint Level
Moderate to High
Growth Driver
Affordable entry point; Harbour Line access
Key Risk
65% of Navi Mumbai area within NMIA funnel zone; no historical CCZM precedent for this airport
Corridor / Locality
Airport Distance
Constraint Level
Growth Driver
Key Risk
Vile Parle / Santacruz
0-3 km (immediate vicinity, CSIA)
Very High (approach funnel)
Metro Line 3 access; established residential demand
Height cap at ~17.87 m; redevelopment relies on TDR under DCPR-2034
Andheri / Kurla
2-6 km (CSIA zone)
High
BKC adjacency; commercial corridor
AAI towers in Andheri under relocation; check individual grid before buying
Ghatkopar
~8-10 km (southeast of CSIA)
Moderate
Metro Line 1 hub; eastern suburbs growth
Conical surface zone; Floor Space Index (FSI) up to 2.7 but TDR may be needed for full utilisation
Ulwe / Panvel
0-5 km (NMIA approach, runway 08/26)
Very High (new airport, northeast-southwest approach)
NMIA opened December 2025; Atal Setu / MTHL connectivity
CCZM for NMIA not yet aligned with full build-out; verify plot-level grid before committing
Khandeshwar / Mansarovar (Navi Mumbai)
5-12 km (NMIA zone)
Moderate to High
Affordable entry point; Harbour Line access
65% of Navi Mumbai area within NMIA funnel zone; no historical CCZM precedent for this airport
The most consequential corridor right now is Ulwe and the surrounding Navi Mumbai nodes within 5 km of NMIA. The airport opened for commercial operations on 25 December 2025. Its single runway 08/26 is oriented northeast-southwest, meaning the approach funnel cuts across a different axis from the CSIA funnel. AAI restricted 150 approved projects in Navi Mumbai to just 55 m height during the pre-operational planning period, and that ceiling covered developments from Nerul to Panvel. Buyers purchasing land near NMIA today without checking the current CCZM grid face the same regulatory surprise that CSIA buyers encountered for decades.
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
Vector (GeoJSON) + Raster Tiles
Last Verified
April 2026
Status
Active