Patna Air Funnel Zones

The table below shows how permitted building height works across the key obstacle limitation surfaces around Patna airport's runway 07/25.

Permitted height in the CCZM is stated as AMSL, not above ground level. Your actual allowable floors equal the CCZM elevation minus your site elevation. A plot at 54 m AMSL with a CCZM ceiling of 64 m AMSL allows only 10 m of building height, roughly three floors. Patna airport's runway 07/25 is oriented east-west, so the funnel zone bites hardest along the eastern and western axes: areas toward Phulwari Sharif on the west and Patna City on the east sit directly under approach paths. The Patna Secretariat's clock tower was formally flagged by AAI for violating approach surface limits, with a 17.5-metre height reduction requested. That is not an abstract regulatory concern; it is the practical reality of building anywhere near the Patna airport height restriction corridor.

The funnel zone is not uniformly bad for buyers. Its restrictions on building density suppress overcrowding in some corridors, keeping land prices lower than their connectivity would otherwise justify. The question is whether your plot sits in a suppressed-price zone that will stay suppressed or one with genuine upside once the regulatory picture clears.

The table below maps key Patna corridors against their airport constraint profile.

Bihta is the most misunderstood corridor. The Airports Authority of India awarded a ₹459.99 crore contract for the civil enclave at Bihta Air Force Station, with construction beginning April 2025. Land within 5 km of the proposed terminal has attracted investor interest, but no CCZM for Bihta has yet been published. Buying land close to the Bihta terminal site before that map is released carries the same regulatory opacity that Patna city buyers have faced for decades at Jay Prakash Narayan Airport.