Karnataka Deputy Chief Minister D. K. Shivakumar met Union Defence Minister Rajnath Singh in New Delhi on April 24 to raise urgent concerns over stringent height restrictions imposed around Bengaluru's defence airports, warning that these curbs are severely hampering urban development across large swathes of India's tech capital. Shivakumar, who also holds the Bengaluru Development Ministry portfolio, submitted a formal letter urging the Centre to strike a balance between aviation safety and the city's explosive growth needs.

What Shivakumar Told the Defence Minister

During the high-level meeting, Shivakumar flagged that authorities issuing No Objection Certificates (NOCs) for construction within a 20-kilometre radius of defence airports in Bengaluru are enforcing restrictions far more stringent than standard norms. He stressed that Bengaluru is among the fastest-growing cities in the world and that such curbs are directly choking development potential in densely populated urban zones.

In his letter to Rajnath Singh, the Deputy Chief Minister specifically highlighted the case of HAL Airport, which is situated in the core urban belt of Bengaluru where demand for residential, commercial, and infrastructure development is at its peak. He noted that previous letters had already been dispatched to the Secretary, Ministry of Civil Aviation; the Secretary, Department of Defence Production; and the Defence Secretary, Ministry of Defence — yet the issue remained unresolved.

The Four Airports Problem and NOC Bottleneck

Bengaluru currently has four operational airports, including the Indian Air Force's Yelahanka Airbase, HAL Airport, and Kempegowda International Airport. Any construction project within the defined radius of these airports requires a mandatory NOC from the respective airport authority before civic permissions can be granted.

The Greater Bengaluru Authority (GBA) had already escalated the matter to the state government, pointing out that defence airport authorities are invoking Rule 5(2) of G.S.R. 751(E), which empowers authorised officers of defence airports to impose additional height restrictions based on their own aeronautical calculations. This has led to a significant backlog in construction approvals and created uncertainty for developers, homebuyers, and infrastructure planners alike.

Meetings were subsequently held between state officials and representatives of all four Bengaluru airports to expedite the NOC clearance process, but a lasting resolution has remained elusive.

Why This Matters for Bengaluru's Future

The implications of unresolved height restrictions extend far beyond individual building permits. Bengaluru is home to India's largest technology and startup ecosystem, and the areas around HAL Airport — including Indiranagar, Domlur, Kodihalli, and Old Airport Road — are among the city's most commercially valuable corridors. Restrictions on vertical construction in these zones force developers to either abandon projects or seek land on the city's periphery, driving up real estate costs and urban sprawl.

Urban planners and civic bodies argue that with Bengaluru's population projected to cross 20 million in the coming decade, the inability to build upward in core zones will intensify housing shortages and infrastructure stress. The conflict between defence aviation safety protocols and metropolitan development imperatives is not unique to Bengaluru — cities like Pune and Hyderabad have faced similar friction with IAF and defence establishment airspace rules, though with varying degrees of resolution.

Background: A Long-Pending Dispute

This is not the first time the Karnataka government has flagged this issue. The state has been writing to the Central government on the matter for several years, reflecting a systemic gap in how defence airspace regulations interact with urban master planning frameworks. The fact that multiple letters to senior bureaucrats — including the Defence Secretary — have yielded no concrete action underscores the institutional inertia at the Centre on this front.

Notably, the Airports Authority of India (AAI) has a defined Obstacle Limitation Surface (OLS) framework for civilian airports, which is relatively transparent and predictable. Defence airports, however, operate under a separate and less publicly accessible regulatory framework, giving their authorised officers wider discretionary powers — a gap that critics argue needs legislative or regulatory reform.

What Happens Next

With Shivakumar directly engaging Rajnath Singh and formally placing the issue on the Defence Ministry's agenda, the Karnataka government is clearly escalating its push for a structured resolution. The Deputy Chief Minister has requested the Defence Minister to direct concerned authorities to take necessary action that serves both flight safety and Bengaluru's development demands.

Stakeholders in the real estate, infrastructure, and urban planning sectors will be closely watching whether the Defence Ministry issues revised guidelines or establishes a joint working group with state authorities. A policy-level intervention — potentially involving the Ministry of Civil Aviation, Ministry of Defence, and Karnataka government — appears to be the only durable path forward. Any meaningful reform to the NOC process could unlock billions of rupees in stalled development across Bengaluru's core urban zones.