Guwahati Air Funnel Zones: Building Height Restrictions

The table below shows how permitted building height works across the key Obstacle Limitation Surfaces around Guwahati airport's runway 02/20.

Guwahati's AAI NOC office is one of only nine designated regional offices in India, meaning all complex height clearance decisions for Northeast India pass through the Borjhar office. AAI takes a median of 25 days to approve NOC applications and approves only 58% of all processed applications nationwide. If your seller or developer has not obtained an AAI height NOC and your plot falls in a red-grid CCZM area, no municipal building permit from Guwahati Metropolitan Development Authority overrides that gap. Confirm the CCZM grid classification before signing anything.

Guwahati's fastest-growing real estate corridors run along the NH27 and NH17 alignments radiating from the city, and the airport's north-south runway orientation means the funnel zone bites hardest directly north and south of Borjhar. Areas east and west of the runway sit under the conical and horizontal surfaces, where height rules are more permissive but still apply.

The table below maps key Guwahati corridors against their funnel zone constraint profile.

Borjhar is the most misunderstood corridor. Brokers marketing plots in Azara and Garal within 2–3 km of the runway ends promote them as airport-facing growth plays without disclosing that the 2% funnel slope formula limits buildings within 1,000 m of the runway edge to just 20 m of height above ground, roughly five to six floors. At 2,000 m from the runway edge, the ceiling rises to 40 m. These are hard limits enforced by GSR 751(E), not municipal discretion.