Home Renovation Cost Calculator
Calculate total home renovation costs for old apartments, villas, and independent houses. Estimate civil work, tiling, kitchen dismantling, electrical rewiring, and painting.
About This Calculator
Calculate total home renovation costs for old apartments, villas, and independent houses. Estimate civil work, tiling, kitchen dismantling, electrical rewiring, and painting.
Applies scope-based structural markup to baseline cabinetry and finishes.
How the Calculation Works
Applies a 1.15x renovation scope multiplier to the subtotal of all enabled areas, plus 18% GST and 10% contingency.
Variable Definitions
- Renovation Multiplier
- 1.15x markup for structural corrections and masonry
Step-by-Step Example
Full Flat Renovation (1000 sq ft) in Kolkata - Economy Quality
- 1
Total Area: 1000 sqft
- 2
Scope: Renovation (1.15x)
- 3
Recommended Budget with GST and Contingency: ₹8,20,000
Accuracy & Editorial Standards
Bharath Ravindran
Founder & Platform Architect
Product Strategist — 16+ years in technology consulting
Formula Sources
- CREDAI housing reports
Data Sources
- Renovation contractor surveys 2025-2026
Last updated: 2026-06-30. All results are estimates for informational purposes only and do not constitute professional financial, medical, or legal advice.
Frequently Asked Questions
How much does it cost to renovate an old flat in India?
Renovation ranges from ₹800–1,500/sqft for basic cosmetic changes and modular kitchen upgrades, and ₹1,800–3,500/sqft for complete layout modification and civil work.
Why are renovation costs higher than new interior projects?
Renovation includes labor-intensive tasks like demolition, debris disposal, surface leveling, and modifying plumbing/electrical lines.
What is the cost of tiling and flooring during renovation?
Flooring tiles cost ₹50–120/sqft, and labor for laying costs ₹30–60/sqft. Premium Italian marble or wooden flooring can range from ₹300–1,200/sqft.
Does the calculator apply a renovation complexity markup?
Yes, the Renovation scope has a 1.15x multiplier to account for civil modifications and alignment works.
How much contingency budget should I keep for renovation?
We recommend keeping at least a 10% to 15% contingency buffer, as renovation projects often reveal hidden wiring or plumbing issues.
Disclaimer: The Home Renovation Cost Calculator on NexProTools is provided for informational and educational purposes only. All calculations are performed entirely in your browser — no data is sent to our servers. Results are based on the inputs you provide and the standard mathematical formulas described above. For decisions involving significant financial, medical, legal, or other matters, please consult a qualified professional. NexProTools assumes no liability for decisions made based on calculator outputs.