Bengaluru Air Funnel Zones: Building Height Restrictions

The table below shows the three Obstacle Limitation Surfaces that govern height around every Bengaluru aerodrome.

Before signing any sale agreement for a plot or apartment in Bengaluru's airport corridors, demand the NOCAS-issued NOC, not just the builder's elevation certificate. The AAI's own NOC letter states plainly that it does not authenticate the site coordinates and AMSL figures provided by the applicant; if those figures are later proved wrong, the NOC is cancelled and the structure faces demolition at the owner's cost.

Not all of North Bengaluru's hottest corridors sit inside the same restriction surface, and that distinction drives real differences in what you can build and at what price.

Devanahalli, the closest locality to KIAL's runway, is largely within the Outer Conical Surface. Plot rates in 2026 range between Rs 6,000 and Rs 10,000 per sq ft, driven by airport expansion, Special Investment Region status, and STRR connectivity. Heights here are manageable for low-rise and villa developments, but any multi-storey project needs BIAAPA approval plus an AAI NOC. The Yelahanka belt sits roughly 16 km from KIAL but within 5 km of Yelahanka Defence Aerodrome, which imposes its own NOC radius of 9.26 km (5 nautical miles). Buildings in Yelahanka that appear to be outside KIAL's Inner Horizontal Surface can still fall inside Yelahanka aerodrome's Inner Horizontal Surface.

The corridor most consistently misread is Yelahanka-Jakkur. Buyers and developers focus on KIAL's distance and miss that structures in this belt may need separate NOCs from GFTS Jakkur and Yelahanka Defence Aerodrome in addition to AAI. Each aerodrome has a different ARP elevation and a different NOC-issuing authority. Bundling them into a single NOCAS application without checking each surface is the most common approval error in this belt.