SBCA approval covers whether your building fits the plot. It does not cover whether your building is too tall for the airspace above it. That is a separate clearance, from a separate federal authority, and it is one of the most commonly missed steps on multi-storey and high-rise projects near Jinnah International Airport.
The Rule: A 15km Radius Around the Airport
The Civil Aviation Authority (CAA) requires a No Objection Certificate before construction of high-rise buildings within 15 kilometres of an airport, a condition that applies in Karachi, Islamabad, Lahore, Peshawar and Multan. The requirement covers the height of the proposed structure, along with any rooftop installations, towers, antennas, or equipment that would add to the effective height, since these can intrude into the same protected airspace even on a building whose main structure would otherwise clear it.
A 15km radius from Jinnah International Airport covers a substantial portion of Karachi's built-up area. If you are planning anything beyond a standard two- or three-storey residential build, particularly a commercial, institutional or apartment project, checking your distance from the airport belongs on the same pre-design checklist as confirming your SBCA setback bracket, not as an afterthought raised after drawings are finished.
How This Connects to SBCA's Own Regulations
This is not only a federal-versus-provincial technicality. SBCA's own regulations acknowledge the same airspace constraint directly. The Karachi Building and Town Planning Regulations include an explicit note that where a plot falls within a designated height-restricted area or flying-gap funnel area, the standard setback requirement is waived for plots of 3,000 sq yd and above, because the controlling constraint in that zone is the height limit itself, not the ground-level setback. Our SBCA setback and FAR table sets out the standard figures this exception modifies.
In practice, this means a large plot inside a flight-path funnel zone is not evaluated purely against the SBCA bulk-standards table. Its permissible height is set by the aeronautical constraint, and the building's footprint and layout are designed around that ceiling rather than around the setback figures that apply elsewhere in the city.
Applying for CAA Height Clearance
The application for height clearance is addressed to the Director General, Civil Aviation Authority, at CAA Headquarters, Terminal-1, Jinnah International Airport, Karachi. Applicants are required to provide full details of the proposed structure's height, along with the height of any tools, equipment, or towers to be installed on the roof, since these are assessed as part of the same obstruction analysis. For certain locations, the Pakistan Air Force is also involved in reviewing proposed construction, reflecting military as well as civil aviation airspace interests.
The CAA has stated plainly that companies and developers are bound to provide complete information on request, and that non-compliance is subject to strict enforcement action. This is not a discretionary courtesy notification; it is treated as a mandatory clearance for qualifying structures.
What Getting This Wrong Actually Costs You
For most standard residential builds on typical Karachi plot sizes, height stays well within limits that would trigger this review, and the practical exposure is low. It becomes a real consideration on:
Multi-storey apartment and commercial buildings. Anything approaching or exceeding the height thresholds that draw CAA's attention needs this checked at the concept stage, before a structural design is finalised around a height that may not clear the airspace review. Our commercial construction service and apartment building construction service both factor this into early project planning for qualifying sites.
Rooftop installations on otherwise compliant buildings. A building whose main structure is within height limits can still trigger a review because of a water tank tower, telecom equipment, or a rooftop structure that adds effective height. This is the detail most easily missed, because the building itself looks compliant and the addition gets treated as a minor afterthought.
Plots already inside an SBCA-designated funnel zone. Where SBCA's own regulations flag a plot as sitting in a height-restricted or flying-gap area, that is a strong signal the CAA clearance question needs to be resolved before, not alongside, the SBCA building plan submission.
Sequencing This Correctly
The costliest way to encounter this requirement is after structural drawings are complete and a height has been committed to across every floor plan. Confirming your plot's distance from the airport and, where relevant, obtaining CAA clearance in principle belongs at the same stage as confirming your SBCA setback bracket: before an architect finalises a design around a height that later has to be cut back. A height reduction discovered late does not just shave a floor off a drawing; it can change the whole structural and mechanical design, because floor-to-floor heights, lift travel, and services routing are all designed around a target height from the outset.
Frequently Asked Questions
Do I need CAA clearance for a standard two-storey house in Karachi? Generally no. Standard residential heights on typical Karachi plot sizes fall well under the thresholds that trigger CAA's height-clearance review. The requirement becomes relevant for multi-storey, commercial, institutional or high-rise projects, and for any rooftop installation that adds effective height.
How far from Jinnah International Airport does the CAA height rule apply? Within a 15km radius of the airport, a No Objection Certificate is required before construction of a high-rise building, covering the structure's height and any rooftop equipment or towers.
Who do I apply to for CAA height clearance in Karachi? The application is addressed to the Director General, Civil Aviation Authority, at CAA Headquarters, Terminal-1, Jinnah International Airport, Karachi, with full details of the proposed height and any rooftop installations.
Does the Pakistan Air Force get involved in this process? For certain locations, yes, the Pakistan Air Force is also involved in reviewing proposed construction alongside the CAA, reflecting shared civil and military airspace interests.
How does this relate to SBCA's height-restricted or funnel zone provisions? SBCA's own regulations recognise designated height-restricted and flying-gap funnel areas, and specifically waive the standard ground-level setback requirement for plots of 3,000 sq yd and above within them, because height, not setback, is the controlling constraint in those zones.
What happens if I build without CAA clearance in a zone that requires it? The CAA has stated that non-compliance is subject to strict enforcement action. Beyond the regulatory risk, an unresolved height or obstruction issue discovered late in a project is far more expensive to correct than a clearance sought before design finalisation, since it can force changes to structural and mechanical design that was built around a now-noncompliant height.
Does a rooftop water tank or antenna count toward my building's height for this purpose? Yes. The clearance requirement explicitly includes the height of tools, equipment and towers installed on the roof, not only the main structure. A building that is otherwise compliant can still require review because of what sits on top of it.
Where in Karachi is most likely to fall within the 15km radius? A 15km radius from Jinnah International Airport covers a large share of Karachi's built-up area. Rather than assuming your plot is inside or outside this radius, confirm the distance for your specific site, particularly for any project beyond standard low-rise residential height.
Plan for Airspace Clearance Before You Design
Naffees & Sons factors CAA height considerations into planning for multi-storey and commercial projects from the concept stage, not after drawings are finalised. If you are planning a project that may fall within Karachi's height-restricted zones, get this checked early.
Talk to Us Before You Finalise Your Design →
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