You should act on this in a practical + legal way simultaneously. Short guidance:
1. Immediate Practical Steps
Send a final written notice (WhatsApp + email + speed post) to:
First floor owner
Builder (if within defect period or common defect issue)
Clearly mention:
Seepage causing damage
Prior complaints ignored
Demand repair within 7–15 days
2. Legal Position (important)
Under nuisance + property law principles, an upper floor owner cannot allow leakage causing damage below.
You can rely on:
Law of private nuisance
Civil suit for injunction + damages
If builder defect (common issue in all floors):
File case under Real Estate (Regulation and Development) Act, 2016 (RERA) for structural defects (within 5 years)
Or consumer complaint for deficiency in service
3. Strong Legal Options
(A) Legal Notice
Send through advocate demanding:
Immediate repair
Compensation for damage
Warning of legal action
(B) Civil Suit
File suit for:
Mandatory injunction → repair leakage
Permanent injunction → stop further damage
Damages → repair cost + mental harassment
(C) Consumer Complaint (if builder issue)
If multiple flats affected → strong case against builder.
4. Evidence (very important)
Keep ready:
Photos/videos (already done ✔️)
WhatsApp chats / notices
Any society complaints
Repair estimates
5. Practical Shortcut (often effective)
Get local plumber/engineer inspection report
Share report + cost estimate in final notice
→ This increases pressure and helps court case
6. If urgency (serious damage)
You can directly file:
Injunction application for urgent repair order
Suggested Strategy (best in your case)
Since all floors affected, this looks like builder defect: ➡️ Send joint notice (if possible with other owners)
➡️ Then go for consumer/RERA case (stronger & faster).