Tamil Nadu raises height limit for low‑rise buildings to 19.5 metres

Tamil Nadu has raised the permissible height for non‑high‑rise buildings from 18.3 metres to 19.5 metres, after amending the 2019 Combined Development and Building Rules. The change removes the previous trigger that classified any structure above 18.3 metres as high‑rise, which required stricter construction norms. Builders had struggled to obtain completion certificates for homes that fell just above the old limit, so the higher ceiling is expected to ease approvals and improve ventilation and aesthetics. The amendment also revises road‑width criteria for commercial zoning. In the Chennai Metropolitan Area, sites that open onto roads at least 12 metres wide are now treated as commercial zones, while in the rest of the state a 9‑metre road width suffices. Minimum road widths are set at 12 metres for conference halls, multi‑storey parking and single‑screen air‑conditioned cinemas; 15 metres for exhibition and community halls and kalyana mandapams in municipal corporations, with a 12‑metre requirement in town and village panchayats; and 18 metres for star hotels, multiplexes or malls. The qualifying road must run continuously for 100 metres on one side of the plot or combined on both sides, excluding the plot frontage. If no road intersection occurs within that stretch, the road must extend for at least 3,250 metres in Chennai and municipal corporation areas, or 100 metres elsewhere. The stretch may be straight, curved or zigzag. The amendment also updates rules for swimming pools, though details were not disclosed.

Context

Raising the height limit aligns Tamil Nadu’s building norms with market demand for taller ceilings, while the road‑width provisions aim to ensure adequate access and safety for larger commercial projects.