Gattahalli Lake Guide: Lake-Side Living off Sarjapur Road, Bengaluru

Gattahalli Lake is a small lake in Gattahalli village, on Rayasandra Road off Sarjapur Road, in Bengaluru 560099. Adarsh Welkin Park Apartments sits beside it, and the developer bills the project as lake-facing. This guide covers where the lake is, what lake-side living is like, and the buffer rules every buyer should check as of September 2026.

Where Gattahalli Lake sits

Gattahalli is a village in Sarjapur hobli, Anekal taluk, in Bengaluru Urban district. It lies in the southeast of the city, between Sarjapur Road and Hosa Road.

The lake sits beside Rayasandra Road, which runs from the Hosa Road side towards Sarjapur Road. Map services place it near Rayasandra, Chikkanayakanahalli and Choodasandra. The PIN code for the area is 560099.

Here is how the lake relates to the project and the nearby roads.

The developer’s location map also marks Rayasandra Lake in the same belt. You can see the map and the site’s roads on the location section of our homepage.

What we know, and what we could not verify

We tried to find official data on the lake as of September 2026. Here is an honest summary.

We could confirm the lake’s name and place on public maps. We could confirm that local reports describe it as key to the area’s ground water. Some local listings also mention encroachment concerns around it, which is common for Bengaluru lakes.

We could not verify 3 things. The first is the lake’s exact area in acres. The second is which Bengaluru body manages Gattahalli Lake today. The third is whether it has a restoration plan after 2020. Many Bengaluru lakes fall under the city corporation, the Karnataka Tank Conservation and Development Authority or the Minor Irrigation department. The owner can differ from lake to lake.

So ask the sales team for the lake’s survey number and area. Ask which authority controls it. These answers matter more after the 2025 change in buffer rules, covered below.

What lake-side living is like

A lake next door changes daily life in about 5 ways. Some are gains, and some need care, as the table below shows.

The gains. Gattahalli Lake gives an open view that no one can build on, as long as the lake stays protected. Upper floors of a G+25 tower can look far across the water. Mornings bring birds, and evenings bring a cool breeze. Open water also keeps the air around it a little cooler than a dense street.

The trade-offs. Lakes in Bengaluru draw mosquitoes, most of all after the monsoon. Some lakes also receive sewage, which can bring smell and foam. The land close to a lake can flood in heavy rain if silt or waste blocks the drains. And a view is only as good as the lake’s upkeep.

The Welkin Park specifications list UPVC sliding windows and balcony doors with mosquito mesh. See the full list on the specifications section.

Other lakes on the Sarjapur Road belt

Gattahalli Lake is one of many lakes in southeast Bengaluru. The city grew around a chain of old tanks, built to store rain for farms. Many still survive, though in mixed health.

Bellandur Lake became known across India for foam and fires about a decade ago. It also led to the 2016 NGT case on buffer zones, covered below. That history shows why buyers near any Bengaluru lake should ask about sewage inflow and upkeep.

Kaikondrahalli Lake, on the main Sarjapur Road, shows the other side. Residents often use it for morning walks. A lake with active care and a walking path adds more to daily life than one behind a locked fence.

For Gattahalli Lake, ask local residents how the lake looks across the year. People who walk Rayasandra Road each morning know it better than any map.

Sunrise, sunset and choosing your floor

Most buyers at Welkin Park pay for a lake view. So check what you will see from your own balcony.

Ask the sales team which of the towers and wings face Gattahalli Lake. Ask which side faces east for sunrise and which faces west for sunset. A west-facing flat gets the evening glow but also the harsh afternoon sun, from about 2 pm to 5 pm.

Height helps, but not always in a straight line. From the 20th floor, you see more water than from the 5th floor. But you also see more of the land beyond, where new towers may rise in 5 or 10 years.

The Phase II blocks give many floor choices. Block 6 runs to the 25th floor in its main wings. Read our Phase 2 guide for the unit ranges. If you are weighing a ground-level home instead, our villas vs apartments guide compares the two views.

Lake buffer rules in Bengaluru, as of September 2026

A buffer zone is a strip of land around a lake where no one may build. In Bengaluru, it protects the lake’s edge, its inflows and the ground water. For buyers, it also protects the view.

Here is how the rules have moved over the past 10 years.

Under the amended law, as reported, small lakes get smaller buffers than large ones. A water body up to 1 acre gets 3 m. One of 1 to 10 acres gets 6 m. One of 10 to 25 acres gets 12 m. Only lakes above 100 acres keep the full 30 m.

Environment groups in Bengaluru have opposed the change. They argue that thin buffers can harm water quality and ground water recharge. The rule may face further review or a court case in 2026 or later. Treat it as open to change.

What does this mean for a lake-side buyer in Bengaluru? Two things. First, a 3 m or 6 m buffer may let new buildings come up close to a small lake. The old 30 m rule kept them further back. That can affect a view that looks open today. Second, a project approved under the older 30 m rule should already sit outside that line.

Checks before you buy near Gattahalli Lake

Use these 6 checks on your site visit.

1. Ask for the lake’s survey number and area in acres. Under the 2025 amendment, the area shapes the buffer width.
2. Ask to see the buffer line on the approved site plan. Check that none of the Welkin Park towers sits inside it.
3. Check the storm-water drains, called rajakaluves, near the site. Bengaluru drains have their own buffer rules.
4. Search both phase numbers on the Karnataka RERA portal. Read the approved layout for Phase I and Phase II.
5. Visit twice: once in the dry months of March to May, and once after heavy rain in September or October.
6. Ask what land lies between Gattahalli Lake and your tower. Ask who owns it and what the zoning allows on it.

The Welkin Park master plan also lists a shallow water body, a floating walkway and viewing decks. These sit inside the project and are separate from Gattahalli Lake. See them on the master plan section.

A lake view is a real gain for daily life, more than most amenities on a brochure. You use a view each day, from the balcony and the living room. Compare that with a gym you may visit 3 times a week. So weigh a lake view against extra amenities with care. But it is only as safe as the rules and the upkeep behind it. Ask questions, read the plans and walk the Gattahalli Lake edge before you decide. For more Sarjapur Road area guides, visit the blog.

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Published by IamHere Realty, authorised channel partner for Adarsh Welkin Park. Project details are from the developer’s official material; verify every detail with the sales team before you decide.