Anyone buying property on the southern reach of Bannerghatta Road will hear the phrase "eco-sensitive zone" at some point, usually from someone who is either selling to them or warning them off. It is a real legal instrument with real consequences for land use, and it is also one of the most confidently misdescribed things in Bengaluru property conversation. This page explains what the park is, what an ESZ actually does, how the Bannerghatta zone's extent has changed, and — the only part that matters for your own decision — how to establish whether a specific piece of ground falls inside it.

We make no claim, in either direction, about where any particular project falls in relation to the zone. That includes Nambiar Beverly Park. We do not hold the notification map, and the honest position is to tell you how to find out rather than to assert something we cannot evidence.

The Park Itself

Bannerghatta was declared a national park in 1974 and extends to about 260.51 sq km across Bengaluru Urban and Ramanagara districts, south of the city. It is not an isolated patch of woodland: it forms part of a wider forest landscape and contains corridors used by elephants moving between larger habitats, which is the ecological reason the surrounding land use is regulated at all.

A distinction worth getting right, because the two names are used interchangeably and are not the same thing. In 2002 a portion was carved out as the Bannerghatta Biological Park — the zoo, safari and rescue facilities that most visitors mean when they say they have "been to Bannerghatta". The national park proper is the protected forest area, and it is the national park, not the zoo, that generates the eco-sensitive zone.

What an Eco-Sensitive Zone Is

An Eco-Sensitive Zone is an area notified by the Ministry of Environment, Forest and Climate Change around a protected area, national park or wildlife sanctuary, under the Environment (Protection) Act, 1986. Its purpose is to act as a transition belt — a buffer in which activity is graded rather than banned outright, so that land immediately outside a park boundary does not turn into an activity that the park cannot survive next to.

An ESZ notification classifies activities into three categories:

• Prohibited — typically commercial mining, commercial use of firewood, major hydroelectric projects and polluting industry.
• Regulated — activities allowed subject to conditions and clearance, typically including tree felling, commercial extraction of natural water and groundwater, and the establishment of hotels and resorts.
• Permitted — ongoing agriculture and horticulture by local communities, rainwater harvesting, organic farming and similar.

Two features of the mechanism matter to a property buyer. First, the notification is accompanied by a zonal master plan and a monitoring committee at district level, and it is the zonal master plan that governs what can be built where. Second, the zone's width is not uniform. The general guidance contemplates a belt of up to 10 km around a protected area, but the actual figure is set park by park in the notification, and it varies along the boundary.

Why the Extent Is Contested

Bannerghatta's zone has a documented history of revision, and knowing it will save you from arguments in which both sides are quoting real but different numbers.

The 2016 draft notification proposed an ESZ of 268.96 sq km, with a belt varying from 100 m to 4.5 km around the park boundary, covering 77 villages and 17 hamlets.

The final notification, dated 11 March 2020, reduced the zone to 168.84 sq km, with a belt of 100 m to 1 km. Conservation groups objected at the time, principally on the ground that the reduction excluded elephant corridors and ecologically significant patches.

The matter did not end there. In January 2026 the Central Empowered Committee recommended withdrawing the 2020 notification and restoring the 2016 draft boundary, finding that the reduction had excluded three elephant corridors without adequate scientific assessment, and proposing that the re-notification be completed within six months. That recommendation awaits action by the Ministry.

The practical consequence for a buyer is the important one: the boundary is live. A statement about whether a given site is inside or outside the zone is a statement about a specific notification at a specific date, and it can change. Anyone who tells you the position with total confidence, in either direction, should be asked which notification they are relying on.

How to Verify Whether a Specific Site Is Inside

This cannot be done from a map on a website, and it cannot be done from a distance in kilometres. ESZ notifications identify the zone by village name and survey number, together with a boundary description and coordinates. So the verification is a documentary exercise, and it goes like this.

1. Get the exact land identity. The village name, the survey numbers and the hissa numbers of the parcel — from the title documents, the khata and the RTC, not from marketing material. Without survey numbers you cannot check anything.
2. Read the notification's schedule. The ESZ notification published in the Gazette lists the villages included in the zone. Check whether your village appears, and read the accompanying boundary description rather than only the village list, because inclusion can be partial.
3. Ask the authorities that hold the map. The district-level monitoring committee constituted under the notification, the office of the Deputy Commissioner, and the forest department for the division are the bodies that hold the authoritative boundary and the zonal master plan. A written query to them is worth more than any number of opinions.
4. Look at the sanction itself. Ask which authority sanctioned the layout and building plans, on what date, and whether any environmental clearance or no-objection was required and obtained. An approval issued by a competent authority is evidence about the land's regulatory position in a way that a brochure is not.
5. Have your own advocate opine. A land-use and title opinion from an advocate you appoint — not the developer's panel — is the single most useful few thousand rupees you will spend on a purchase of this size.
6. Get the developer's answer in writing. Whatever you are told verbally, ask for it on letterhead. And once a project is registered under the Real Estate (Regulation and Development) Act, the approvals filed on the Karnataka RERA portal become a public record you can check against what you were told.

What Being Near a Park Does and Does Not Mean

Being near Bannerghatta is not, in itself, a legal problem. Very large numbers of people live legitimately in villages and layouts around the park, and much of the ESZ's regulated list concerns industry, mining, quarrying and resorts rather than ordinary housing. Nor is it automatically an advantage — proximity to forest also means wildlife movement, seasonal restrictions and, in some stretches, genuine human-wildlife conflict.

What it does mean is that the regulatory position of a specific parcel is a question with a documentary answer, and that you should get that answer before you commit rather than after. That is true whichever project you are looking at.

Where to Go Next

The locality around the park's northern approach is described in What is Bilwaradahalli, and the project's own corridor position on the location page. Our registration position and how to check it are on the RERA page. Further explainers are indexed on the blog.