after how many year society can go for redevelop for building

A housing society can consider redevelopment when the building becomes old, unsafe, structurally weak, or uneconomical to repair. There is **no single fixed number of years** that applies everywhere. Commonly: - Many societies start considering redevelopment after **25–30 years**. - If the building has major structural issues, it may be taken up **earlier**. - The decision is usually based on a **structural audit/report**, repair cost, municipal rules, and approval by society members. So, age alone is not the only factor—**building condition and feasibility** matter most. **Professional review recommended:** Check your state’s cooperative housing and municipal redevelopment rules, and get a structural audit before proceeding.