Yes, in certain circumstances, you can legally prevent a neighbour from constructing in a manner that blocks natural light and air (referred to as an "easement of light and air") to your property in Ahmedabad, though this right is not automatic and generally needs to be specifically established, typically through long, uninterrupted enjoyment, rather than existing simply because your property has traditionally received light and air from a particular direction. Under Section 15 of the Indian Easements Act, 1882, an easement of light and air, similar to a right of way, can be acquired through prescription — peaceable, open, and uninterrupted enjoyment of light and air through defined openings (such as windows) for a period of 20 years, ending within two years before the suit is filed, ending with the establishment of a legally enforceable right.

The key distinction courts draw is between a mere expectation or historical pattern of receiving light and air, which does not by itself create an enforceable right, and an actual prescriptive easement genuinely established over the required 20-year period through specific, defined openings that have consistently received light and air without obstruction or objection — general open space around a property, without specific window openings that have historically received light, generally does not qualify for this kind of protection.

Where such a prescriptive easement has been genuinely established, and a neighbour begins construction that would substantially and materially obstruct the light and air previously enjoyed through your qualifying openings, you can seek a court injunction to prevent or limit that construction — courts assess whether the obstruction causes a substantial, material deprivation of light and air (a standard higher than merely a minor reduction), often requiring expert or technical assessment of the actual impact on your property's illumination and ventilation.

The appropriate remedy is a suit for declaration of the easement right under Section 34 of the Specific Relief Act, 1963, combined with a permanent injunction under Section 38 of the same Act to prevent construction that would substantially obstruct the established right, and where construction is imminent or already underway, an urgent interim injunction under Order 39 Rules 1 and 2 CPC can provide immediate protection while the fuller case proceeds, ideally supported by a court Commissioner's inspection under Order 26 Rules 9 and 10 CPC to document the current light and air conditions and the proposed construction's likely impact.

Given how technical the assessment of "substantial" light and air deprivation can be, and how strictly courts require proof of the full 20-year prescriptive period through specific openings, careful case preparation with expert input is genuinely valuable. For representation before Ahmedabad's courts, the Top Property Lawyers in Ahmedabad | Aapka Legal Advice directory can connect you with suitable counsel, and our legal experts at Aapka Legal Advice can help assess whether your situation meets the threshold for a genuine easement claim.

In conclusion, yes, a neighbour can be stopped from blocking natural light and air in Ahmedabad where you can establish a genuine prescriptive easement under Section 15 of the Indian Easements Act, 1882, through 20 years of uninterrupted enjoyment via specific openings, and where the proposed obstruction would cause a substantial, material deprivation — acting promptly once construction threatens this right significantly improves your chances of effective relief.