Apartments in Flood-Risk Zones — Verified by Brickplot
Flood-hotspot and Zone-B classified · BBMP / KSNDMC sourced · Updated 2026
Why flood-zone classification matters
The Central Water Commission and city disaster-management bodies — BBMP and KSNDMC in Bangalore, MCGM in Mumbai, GCC in Chennai — publish locality-level flood advisories every monsoon. Brickplot ingests these advisories and classifies every project we audit as Cat-A (severe, recurring flood history), low-risk (Cat-B, occasional waterlogging), or safe. A documented flood-hotspot classification lowers the Location & Climate axis and withholds a Buy verdict, whatever the project’s total score. Until 10 August 2026 it also capped the total at 5.4; that cap was retired because the axis already carried the penalty. Builders with documented engineered mitigation — stormwater retention, raised plinths, lake-bund reinforcement — can have the restriction lifted with evidence, but the burden of proof is on the builder.
This page lists every project in our database that sits in a Cat-A or Cat-B zone. It is not an Avoid list — many of these projects are otherwise excellent. But buying without seeing this classification is buying blind. Use it to ask the right questions on your site visit.
Frequently Asked Questions
What is a Cat-A flood-risk zone?
Cat-A is the highest tier in the Central Water Commission flood-risk classification — localities with a documented history of severe waterlogging, lake-catchment overflow, or recurring monsoon flooding. In Bangalore this includes Bellandur, HSR low-lying sections, Bommanahalli, parts of Yelahanka and Kasavanahalli. Brickplot scores any project in such a zone lower on the Location & Climate axis and withholds a Buy verdict, unless the builder has documented engineered mitigation.
How does Brickplot classify flood risk?
We use a hardcoded locality lookup built from BBMP and KSNDMC published flood-zone advisories plus 2017 and 2022 post-mortem reports. Each project is classified as cat-a, low-risk (Cat-B), or safe. We never extrapolate flood risk per project — only the locality classification is applied. This is a static classifier; flood-risk profiles are stable on a yearly time horizon and re-audited annually.
Does flood risk automatically make a project an Avoid?
No. Flood-hotspot proximity lowers the Location & Climate axis and withholds a Buy verdict, but it does not by itself force an Avoid. A builder with documented engineered mitigation — raised plinths, stormwater drainage, retention ponds, lake-bund reinforcement — can have the restriction lifted with evidence.
What about projects outside Bangalore?
Our Bangalore flood classifier is the most mature because BBMP and KSNDMC publish granular locality data. For Mumbai, Pune, Hyderabad, Chennai and Gurgaon we rely on CWC basin-level advisories and city civic body flood reports. Where we cannot verify locality-level flood data, we mark the field as null rather than guess. Cross-city expansion is on the 2026 roadmap.
How can I check flood history myself?
Check the BBMP flood hotspot list, the KSNDMC daily flood advisory, your city civic body monsoon preparedness report, and historical news coverage of the 2015, 2017, 2022 monsoon events. Talk to residents who lived through the last two monsoons. Visit during heavy rain if you can. The official portal for Karnataka is ksndmc.org. Mumbai residents should check the MCGM monsoon page. Chennai has the GCC flood advisory portal.