Slum area check by location or survey number

In law, a slum area is an area the Government has declared to be one by notification under section 3 of the Tamil Nadu Slum Areas (Improvement and Clearance) Act, 1971. The declaration matters for what follows it: under section 5(1) the authority can bar anyone from erecting a building in a slum area without its written permission, section 29 bars suing for or executing the eviction of an occupant without the authority's written permission, section 11 provides for clearance areas, section 17 for acquisition, and section 20 fixes compensation at the market value on the date of the notice. The state board concerned is now the Tamil Nadu Urban Habitat Development Board, renamed from the Tamil Nadu Slum Clearance Board in 2021.

No, and this page never says so. The check reads the state GIS slum boundary map, which is not the list of areas notified under section 3 of the 1971 Act, so the two need not match. "No mapped slum boundary here" means only that none of the boundaries on that map meets your point or parcel. It is not a clearance. Confirm with the Tamil Nadu Urban Habitat Development Board and the corporation before you rely on it.

Five municipal corporations: Chennai (1,195 mapped slum areas), Coimbatore (397), Madurai (350), Tiruppur (92) and Erode (88), 2,122 in all. Only the Chennai areas carry names, together with their ward and zone (15 zones and 184 wards). For a location outside the limits of those five corporations the answer is "not assessed", because the map says nothing about it either way.

Only with great care. DT Next reported on 26 February 2025 that the Tamil Nadu Urban Habitat Development Board had not issued sale deeds in 143 settlements, 77 of the 399 in Chennai, and that units which allottees had sold to third parties were made ineligible for sale deeds. Before paying anything, ask the board in writing whether a sale deed has been issued for that unit and in whose name, and do not rely on an agreement with an allottee alone.

Ask the Tamil Nadu Urban Habitat Development Board (the Tamil Nadu Slum Clearance Board until 2021) whether the area is notified under section 3 of the Tamil Nadu Slum Areas (Improvement and Clearance) Act, 1971, and whether any clearance or acquisition under sections 11 or 17 touches the land. Ask the corporation the same for the ward. Take the survey number, the ward and a map pin, and get the answer in writing. A mapped boundary on this page is a reason to ask, not the answer itself.

For areas declared as slums by the board, yes. The Tamil Nadu Combined Development and Building Rules, 2019 deem those areas to be Economically Weaker Section (EWS) areas, in Rule 16(7) and Rule 30(2), and EWS areas follow different norms, for example a 1 metre passage and a minimum layout plot of 32 square metres. Ask your architect to check the site's status before a plan is drawn to the ordinary norms.

The state GIS slum boundary map records a name, a ward and a zone only for the Chennai areas. In Coimbatore, Madurai, Tiruppur and Erode it draws the boundary and its extent without a name, so a result there says "name not recorded" rather than guessing one.

They are context, not a finding about your land. Every result says how many other mapped slum areas lie within 500 metres and which one is nearest, with its distance. A boundary a few metres from your plot is worth checking on the ground and with the board, because a line on a map is not a surveyed boundary.