The Government of Karnataka on February 21, 2026, issued the Karnataka Municipal Corporations Model Building (Amendment) Bye Laws, 2026, further to amend the Karnataka Municipal Corporations Model Building Bye-Laws, 2017.
The following has been amended, namely:
• The key amendment mandates that all new constructions and expansions with a built-up area exceeding 5,000 sq. m. shall install onsite Sewage Treatment Plants (STPs) with 100% wastewater treatment capacity, ensure tertiary treatment, and implement dual plumbing systems for reuse of treated water. Discharge of untreated sewage into stormwater drains or water bodies is strictly prohibited, and treated water shall meet prescribed environmental norms.
• The amendment also requires onsite solid waste management systems, composting facilities where necessary, metering of wastewater and treated water, proper sludge disposal as per standards, and certification of STP adequacy for larger projects.
• Overall, the amendment strengthens wastewater recycling, solid waste management, and sustainable building practices in urban areas of Karnataka.
[Notification no. - UDD/138/MYAP/2023]
