Getting Building Plan Approval First
Before breaking ground, you need a building plan approval from the local body (municipality or panchayat) based on DTCP/CMDA approval norms.
For DTCP-approved plots in panchayat areas: submit plan to the relevant Taluk/Panchayat Union office. Requirements: plot ownership documents, site plan, floor plan, structural drawings, and FSI (Floor Space Index) calculation.
For CMDA areas: plan approval from the ward's local body per CMDA master plan norms.
Plan approval typically takes 3–6 weeks. Don't start construction without approval — unapproved construction can face demolition orders and creates problems at resale.
Realistic Construction Costs (Chennai, 2025)
**Basic construction (brick + cement mortar, tiled flooring, basic fixtures):** ₹1,600–2,000 per sq ft built area.
**Mid-range (concrete structure, vitrified tiles, standard electrical, decent kitchen/bathroom):** ₹2,000–2,800 per sq ft.
**Premium (imported tiles, modular kitchen, premium sanitary, ceiling work):** ₹3,000–5,000 per sq ft.
**Labour + materials split:** approximately 40% labour, 60% materials at today's prices. Material costs (steel, cement, sand) fluctuate — budget 10% contingency on materials.
Example: 1,000 sq ft House on 1,200 sq ft Plot (Ponneri)
Plot cost: ₹12 lakhs (₹1,000/sq ft). Building plan approval + legal: ₹30,000. Construction (mid-range, 1,000 sq ft built-up): ₹22–25 lakhs. Boundary wall + gate: ₹1.5 lakhs. Total investment: ₹36–40 lakhs.
Equivalent completed property market value at Ponneri in 3 years (projected): ₹45–55 lakhs. That's a potential 12–50% premium on total investment — while having lived in or rented the house.
Contractor Selection: The Most Important Decision
Good contractors are rare; bad ones are everywhere. Selection process:
1. Get 3 quotes for the same specification 2. Visit at least one completed project of each contractor 3. Speak to the homeowner (not arranged by contractor) about experience 4. Check GSTIN registration and contractor license 5. Sign a written agreement with milestone payments (not lump-sum advance) 6. Never pay more than 10% advance before work starts
Payment structure best practice: 20% on foundation completion, 30% on structure completion, 30% on brick/plastering completion, 15% on finishing work, 5% retention for 3 months after handover.