Question 1

What is the Patna airport funnel zone and does it affect my plot?

Accepted Answer

Yes, it can. The funnel zone runs along runway 07/25's east-west axis and caps building height at 2% of the distance from the runway edge. Every plot within 20 km of Jay Prakash Narayan Airport's ARP falls under AAI's CCZM and requires a height check via the NOCAS portal.

Question 2

Do I need an AAI NOC to build near Patna airport?

Accepted Answer

Yes, if your proposed building's top elevation in AMSL exceeds the CCZM grid's Permitted Top Elevation, or if your grid is marked red. Below the ceiling, Patna Municipal Corporation can approve directly. Above it, apply through AAI's NOCAS portal before beginning any construction.

Question 3

How is AMSL height calculated for a plot near Patna airport?

Accepted Answer

Subtract your plot's ground elevation in metres AMSL from the CCZM Permitted Top Elevation for your grid square. The result is your maximum above ground level building height. Get site elevation certified by a licensed surveyor; the NOCAS system then calculates the PTE comparison automatically.

Question 4

What is the maximum building height within 4 km of Patna airport?

Accepted Answer

Within the inner horizontal surface, roughly 4 km from runway ends, the cap is approximately 45 m AGL. In the approach funnel directly east or west of runway 07/25, permitted height equals 2% of distance from the runway edge: 1,000 m away allows only 20 m of height.

Question 5

What happened with the Patna Secretariat clock tower and the airport?

Accepted Answer

AAI formally requested a 17.5 m reduction in the Secretariat's 49.5 m clock tower height because it sits in the airport's approach path. Aircraft descend at a steeper angle than the standard 2.5 degrees because of surrounding obstructions, making this the most visible example of Patna's funnel zone conflict.

Question 6

Does the Bihta airport project create new height restrictions near Patna?

Accepted Answer

Yes, it will. Once AAI publishes a CCZM for the Bihta civil enclave, land near the proposed terminal site will face fresh funnel zone caps. No CCZM for Bihta has been notified yet. Buyers near Bihta should treat this regulatory gap as a material risk before committing to any purchase.

Question 7

Where can I view the official CCZM map for Patna airport?

Accepted Answer

The AAI-certified CCZM for Patna is available on AAI's NOCAS portal. Heights shown are AMSL. Deduct your certified site elevation to calculate your actual permitted building height above ground for any specific survey number or plot location in Patna.

4 Verified lands & plots for sale falling under the Patna Air Funnel Zones.