IAF Air Funnel Zones - Ambala & Chandigarh

Two separate rulebooks govern height here, and mixing them up is the single most expensive mistake a buyer can make. Ambala Air Force Station is an active military installation flying Rafale jets under 7 Wing's No. 17 Squadron, and it falls under a 2007 Gazette of India notification that specifically restricts construction around Indian Air Force aerodromes and installations, separate from ordinary civil aviation rules. Chandigarh's airport, by contrast, is a joint civil-military facility governed primarily through AAI's standard Colour Coded Zoning Map process. A plot near Ambala can face both regimes at once; a plot near Chandigarh typically faces one.

The formula matters more than the map color. Under the standard approach-path calculation, a structure gets one metre of permitted height for every 50 metres it sits back from the airport boundary along the flight path, and one metre for every 15 metres sideways from that path. That means two plots an equal straight-line distance from the runway can carry very different height caps depending on whether they sit under the flight path or off to the side.

AAI's own enforcement record backs this up: nationwide, roughly 40 percent of height clearance NOC applications get rejected outright, and buildings that go up without one have faced court-ordered demolition of the offending floors in cities including Lucknow. Always confirm the exact Permissible Top Elevation for a specific survey number through NOCAS before signing any agreement, since CCZM grid boundaries can shift with each AAI revision.

Not every locality inside the 20 km radius carries the same restriction. Some sectors sit directly under a flight path and stay capped for the foreseeable future. Others sit just off to the side and have already been cleared for much taller construction.

Mohali is the clearest illustration of how much this variance matters in practice. A master plan revision by the Punjab government allowed towers up to 100 metres, more than double the old limit, in sectors positioned away from the runway's landing and takeoff path, while sectors still sitting under that path stayed capped around 45 metres. A buyer comparing two plots on a map without checking which side of the flight path each one sits on can end up paying tower-scale prices for a plot that will never legally clear more than a handful of floors. The dispute over relaxing height limits near Chandigarh's Capitol Complex adds a further wrinkle for anyone buying toward Zirakpur: that restriction exists to protect a UNESCO-recognised heritage precinct, and it operates independently of whatever the airport's CCZM grid says for the same plot.