MEP Basics for Homeowners: Electrical, HVAC and Plumbing Explained
Why the invisible systems in your home decide comfort, safety and running cost more than any finish …
A pre-renovation checklist that prevents the three most expensive surprises — seepage, wiring and society permissions.
Renovation goes wrong in the first week, not the last. Run this checklist before demolition.
- Seepage survey. Check shared walls, bathroom slabs and terrace during or right after rain.
- Wiring age. Anything above 20 years usually needs full rewiring, not extension boards.
- Society NOC and timings. Most societies restrict working hours and material lifts.
- Structural walls. Never remove a wall without confirming it is not load bearing.
- Plumbing chase routes. Know where lines run before cutting a wall.
- Waterproofing scope. Bathrooms and terraces need it redone, not touched up.
- Material storage space. On-site storage decides whether work stalls.
- Debris removal plan. It is a real cost and a real permission issue.
- Live-in or vacate. Living in during work adds roughly 15–20% to timeline.
- Written stage-wise payment schedule. Tie payments to completed stages, not dates.