How tall can you build near an airport, at this exact spot
Drop a pin and get the height a building may rise to under the airport height rules, from both the state airport NOC map and the AAI colour coded zoning map. The lower limit governs, the ground level is taken off, and you see the answer in metres and rough floors.
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- Airport
- Chennai
- Permissible top elevation
- 66 m above sea level
- Ground at the spot
- 7.5 m
- Rough floors
- About 19
Freeevery run
What we need
One thing at a time. Fill it in and press Run.
The answer
From the register, with its date and source.
Nothing run yet. The answer appears here with everything this mini adds:
- Both limits shown and the lower one named as the governing figure
- A rough floor count at three metres a floor, so the cap reads in storeys
- Whether an AAI no-objection certificate is needed at this point
Airport height limits, briefly
The permissible top elevation is the highest point a structure may reach, measured from mean sea level, not from the ground; the buildable height is that figure minus the ground level at the site.
- Two maps read
- Lower one governs
The state airport NOC layer and the AAI colour coded zoning map are both read at the pin. The lower limit is the one that counts.
- Measured from
- Mean sea level
Airport limits are top elevations above the sea, so the ground at the site is taken off to give the height you can build.
- Floors
- About 3 m each
The floor count is the buildable height divided by about three metres, a planning rule of thumb, not a figure from the map.
How to check the airport height limit for a plot
- 1
Place the pin
Tap the plot on the map, paste a Google Maps link, or use your location while you stand there.
- 2
Add your planned height
Optional. Type the height in metres and the answer says whether it clears and whether an AAI NOC is needed.
- 3
Press Run
You get the buildable height, the airport, the map that governs, the ground level used and a rough floor count.
When it helps with land
Before buying for a tall building
A plot near the approach path can cap the storeys a developer can sell. Know the cap before the price.
Before the architect draws
Start the design inside the height the maps clear, and know early whether an AAI NOC is part of the file.
Checking a planned height
Type the proposed height and see whether it complies, with the reason when it does not.
This models what the zoning maps allow at a pin, and the Airports Authority fixes the final figure in its NOC. See what it has actually granted nearby with the issued clearances mini, and confirm with the authority before you build.
Questions people ask
How do I check the airport height restriction for my plot?
Drop a pin on the plot above, or paste a Google Maps link, and press Run. You get the height you can build there in metres, the map it comes from and a rough floor count. Add your planned height to see whether it clears.
Which limit applies?
The lower of the two maps. The answer names the one that governs, and lists both.
Why is the height less than the figure on the map?
The map gives a permissible top elevation above mean sea level. Your land already stands some metres above the sea, so the ground level is taken off to give the height you can actually build.
Do I need an AAI NOC?
The answer says so, with the reason. Where the zoning map colour says a NOC is to be obtained from AAI, no height is cleared without one. Elsewhere the local authority can approve up to the map's height, and a NOC is needed above it. In the CMDA area, practice asks for one for buildings of 30.5 m or more, or above 10 floors.
Is the floor count exact?
No. It is the buildable height divided by about three metres a floor, a planning rule of thumb.
It says no airport zone reaches my pin.
None of the zones we hold for Tamil Nadu covers that spot, so the building rules alone set the height. A tall building in the CMDA area may still be asked for an AAI NOC.
Is this free?
Yes.