The phrase "eco-sensitive zone" reaches anyone buying property on the southern reach of Bannerghatta Road sooner or later, 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 among the most confidently misdescribed things in Bengaluru property conversation. 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: those are what this page explains.

About where any particular project falls in relation to the zone we make no claim, in either direction. Nambiar's Beverly Green is included in that. 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

South of the city, across Bengaluru Urban and Ramanagara districts, Bannerghatta covers about 260.51 sq km and was declared a national park in 1974. An isolated patch of woodland it is not: it belongs to a wider forest landscape and holds corridors that elephants use in moving between larger habitats, and that is the ecological reason land use around it is regulated at all.

A distinction worth getting right, since the two names are used interchangeably and are not the same thing. A portion was carved out in 2002 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 the eco-sensitive zone is generated by the national park, not by the zoo.

What an Eco-Sensitive Zone Is

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 — that is what an Eco-Sensitive Zone is. 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. One is that the notification comes with a zonal master plan and a district-level monitoring committee, and it is the zonal master plan that governs what can be built where. The other is that 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

Revision has a documented history at Bannerghatta, and knowing it will save you from arguments in which both sides are quoting real but different numbers.

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

A belt of 100 m to 1 km, and a zone of 168.84 sq km, is what the final notification, dated 11 March 2020, left in place. Conservation groups objected to the reduction at the time, principally on the ground that it 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 boundary is live — and for a buyer that is the consequence which counts. Say that a given site is inside or outside the zone and you are speaking about one particular notification on one particular date, which can change. So 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

Neither a map on a website nor a distance in kilometres will do this. ESZ notifications identify the zone by village name and survey number, together with a boundary description and coordinates. The verification is therefore 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

Proximity to the park cuts neither way on its own. It is not, in itself, a legal problem: very large numbers of people live legitimately in villages and layouts around Bannerghatta, and the ESZ's regulated list is largely about industry, mining, quarrying and resorts rather than ordinary housing. Neither is it automatically an advantage, since living close to forest also brings wildlife movement, seasonal restrictions and, along some stretches, genuine human-wildlife conflict.

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

Where to Go Next

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