Airport NOC Survey Delhi NCR — IGI Height Clearance & Zone Survey

Delhi NCR is one of the most heavily regulated regions in India for building height, and it’s also one of the most misunderstood. A large share of developers in Noida, Gurugram, Faridabad, and Ghaziabad assume that because 2020’s rule changes shrank the red zone around Indira Gandhi International (IGI) Airport, height restrictions have relaxed across the board. They haven’t. This page covers what an Airport NOC survey Delhi NCR project actually needs to account for — IGI’s red zone, the funnel zone, the wider Colour Coded Zone Map, and the added complexity of a region with more than one regulated aerodrome.

Why Delhi NCR Is a Complicated NOC Region

Most Indian cities deal with a single civil airport’s zoning. Delhi NCR deals with several overlapping layers at once:

• IGI Airport (Delhi) — the primary civil airport driving the region’s Colour Coded Zone Map, red zone, and funnel restrictions
• Hindon Airport (Ghaziabad) — a civil enclave operating out of an Indian Air Force station, meaning nearby sites can fall under both AAI’s civil process and a separate defence clearance requirement
• Noida International Airport (Jewar) — the upcoming airport already influencing height and land-use planning across Greater Noida and the wider Yamuna Expressway corridor

If your project sits in Ghaziabad near Hindon, don’t assume an AAI NOC alone covers you — sites close to the civil enclave may also fall under Indian Air Force jurisdiction, which follows a completely different application process (see our Defence IAF height clearance NOC page for how that works).

IGI’s Red Zone: What Actually Changed in 2020

Two distinct restrictions operate around IGI, and confusing them is the single most expensive mistake buyers and developers make. Until 2020, the red zone under the CCZM covered 129 sq km around IGI, within which no structure above 18 m could be built without a mandatory AAI NOC. Following the 2020 rule changes, the red zone area was reduced to 60 sq km, but the 18 m ceiling inside it remains unchanged. In other words: the area covered by the strictest rule shrank, but inside whatever area is still covered, the height cap didn’t move. A plot that fell outside the red zone after 2020 isn’t automatically free of restrictions either — it simply falls under a different CCZM grid with its own permissible top elevation, not zero restriction.

The Approach Funnel — Delhi NCR’s Strictest Zone

The funnel zone is more severe than the red zone, and it applies directly along the runway approach and departure paths rather than as a flat radius. In the funnel, permitted height equals 2% of the distance from the runway edge — a plot 1,000 m from the runway edge is capped at just 20 m. This isn’t theoretical: AAI directed the Delhi Development Authority to halt construction at nearly 100 plots in Dwarka Sector 8 after determining the buildings fell inside the runway approach paths. That single case is the clearest example on record of a funnel restriction stopping a project after purchase, at a location many buyers assumed was already cleared.

How the CCZM Applies Across Delhi NCR

The Colour Coded Zone Map divides the full 20 km radius around IGI into colour-coded grids, each carrying a Permissible Top Elevation (PTE) measured in metres above mean sea level (AMSL). Vasant Kunj is a good example of how this gets misread: eased 2020 norms shrank the red zone and simplified NOCAS approvals, but every plot in Vasant Kunj still sits within a CCZM grid with its own PTE figure, and the lowest applicable surface restriction governs. The same logic applies across the wider NCR — Noida, Greater Noida, Gurugram, Faridabad, and Ghaziabad each sit at varying distances from IGI (and, in Ghaziabad’s case, from Hindon too), so the permissible height at your exact coordinates has to be checked against the current CCZM rather than assumed from a neighbouring project.

Do You Need an AAI NOC for Your Delhi NCR Project?

Under GSR 751(E), no construction or planting is allowed within a 20 km radius of an airport’s Aerodrome Reference Point without a prior NOC from AAI, irrespective of the height or type of structure — the requirement to check applies regardless of how tall your building is. Whether a full application is actually needed comes down to your surveyed coordinates and elevation against the CCZM: sites where the proposed structure’s top elevation is below the CCZM’s permitted top elevation may be auto-settled by the system without a full manual review, but you only know that after the site is surveyed and checked.

How an Airport NOC Survey Works in Delhi NCR

1. Zone identification — Confirm which zone your plot falls in — red zone, funnel, or a standard CCZM grid — and, for Ghaziabad-area sites, whether Hindon’s defence jurisdiction also applies.
2. Site elevation and coordinate survey — A site elevation survey captures WGS-84 coordinates and AMSL elevation across the plot, meeting AAI’s 0.5 m elevation and 3 m position accuracy requirements.
3. PTE comparison — Surveyed elevation is checked against the CCZM’s Permissible Top Elevation for that specific grid, since PTE varies plot to plot across the region, not by area alone.
4. Documentation — Certificates, ownership proof, and structure drawings are compiled per AAI’s NOCAS documentation requirements.
5. NOCAS filing — The application is submitted online, or, for grids already cleared under CCZM, routed through the local municipal body without a separate AAI referral.
6. NOC issuance or auto-settlement letter — Depending on the zone, you’ll receive either a formal NOC or a system-generated auto-settlement confirming no NOC was required.

Which Structures Need This in Delhi NCR

This isn’t only a concern for high-rise residential and commercial buildings. The same building height clearance requirement applies to solar power projects being developed in the outer NCR belt, wind and hybrid renewable installations, telecom towers, and industrial structures anywhere within the notified radius — the Dwarka funnel case shows that even structures that seem well clear of an obvious “airport zone” can still fall inside a regulated corridor.

Why Get Your Delhi NCR Airport NOC Survey Done by Surveying India

• In-house DGPS and Total Station teams delivering WGS-84 coordinates and AMSL elevation to AAI’s exact accuracy requirements across Delhi, Noida, Gurugram, Faridabad, and Ghaziabad
• Direct familiarity with IGI’s red zone, funnel zone, and CCZM grid structure, so we check the right restriction for your exact plot rather than assuming a flat rule
• Clear guidance on the Hindon civil-enclave overlap for Ghaziabad-area sites, where both AAI and defence clearance can apply
• Documentation prepared to AAI’s exact NOCAS format, cutting down the remarks and resubmissions that stall projects region-wide
• Over a decade of survey delivery for government bodies, PSUs, and private developers across airport-regulated zones in India, alongside our teams working in Jaipur, Lucknow, Chandigarh, Ahmedabad, Kota, and Bhopal

Planning a project anywhere in Delhi NCR? Share your plot location and we’ll confirm which zone applies, what your realistic permissible height looks like, and whether Hindon’s defence jurisdiction is a factor before you commit to a layout.

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Frequently Asked Questions

Did height restrictions around IGI Airport end after the 2020 rule changes? No. The red zone’s area shrank from 129 sq km to 60 sq km, but the 18 m height cap inside that zone is unchanged, and every plot in the wider 20 km radius still falls under its own CCZM permissible top elevation.

What is the funnel zone, and how is height calculated inside it? The funnel is the approach and departure corridor aligned with the runway ends. Permitted height equals 2% of the distance from the runway edge — for example, a plot 1,000 m from the runway edge is capped at 20 m.

Do I need a separate NOC for sites near Hindon Airport in Ghaziabad? Possibly. Hindon operates as a civil enclave at an Indian Air Force station, so sites nearby can require both an AAI civil NOC and a separate defence clearance, depending on the exact zone.

Is every construction project within 20 km of IGI required to apply for an NOC? The requirement to check applies to any structure within the 20 km radius regardless of height, but whether a full manual NOC application is needed depends on whether the surveyed elevation exceeds the CCZM’s permitted top elevation for that grid — some cases are auto-settled by the system.

Why did construction stop on plots in Dwarka Sector 8 that seemed outside the main airport zone? Those plots fell inside the runway approach funnel rather than the red zone, which most buyers don’t check separately — it’s a clear example of why zone identification needs a proper survey rather than assumption.

Regulatory reference: Height clearance rules for Delhi NCR are governed by Gazette Notification GSR 751(E), 2015, and the Colour Coded Zone Map maintained by the Airports Authority of India on the official AAI NOCAS portal. Always verify the current PTE and zone classification for your specific coordinates before finalising a project.