The question we hear most often from clients in Delhi-NCR is simple: “Should I build RCC or go prefab?” The answer, until now, has been clouded by assumptions, vague claims, and supplier bias. This report cuts through that.
We modelled a real G+1 residence — 2,540 sqft, four bedrooms, Delhi-NCR location in Seismic Zone IV — using both conventional RCC construction and our MS+CFS hybrid prefab system. Every item is line-by-line costed: excavation, concrete mix grades, steel reinforcement, formwork, labour, plastering, waterproofing. Nothing estimated in bulk.
“The MS+CFS hybrid system saves ₹8.02 Lakh on a 2,540 sqft home — and completes in 18–22 weeks instead of 12–15 months.”
01 — Summary
The headline numbers
At the structure level — foundation through roof slab, including plastering and waterproofing for RCC — the total cost difference is unambiguous.
| Cost Head | Conventional RCC | MS+CFS Hybrid Prefab |
|---|---|---|
| Foundation | ₹8.22 Lakh | ₹7.52 Lakh |
| Superstructure | ₹34.04 Lakh | ₹33.21 Lakh |
| Plastering & Finishing | ₹6.49 Lakh | Included above |
| Grand Total | ₹48.75 Lakh | ₹40.73 Lakh |
| Cost per sqft | ₹1,919/sqft | ₹1,604/sqft |
| Saving with Prefab | ₹8.02 Lakh (16% less) |
The prefab system is ₹315 per sqft cheaper — before any consideration of faster occupancy, lower finance costs, or the thermal and seismic advantages covered later in this report.
02 — Foundation
Why the foundation costs less with prefab
Conventional RCC buildings use continuous strip footings — a perimeter-wide concrete trench running under every external and most internal walls. For a 2,540 sqft G+1, that means ~53 linear metres of trench, excavation of 48 cubic metres, and over 2,500 kg of steel reinforcement in the foundation alone.
The MS hybrid prefab system uses isolated pad footings — 750×750×400mm pads under each of the 20 MS column positions only. Result: 16.8 cubic metres of excavation instead of 48. Less than half the concrete. Less than half the steel.
Foundation is complete in 3–4 weeks with the prefab system versus 6–8 weeks for RCC. After that, no more concrete is poured — the entire superstructure is dry construction.
03 — Material Efficiency
The material quantity difference is dramatic
A direct comparison of key materials shows just how resource-intensive conventional wet construction is versus a factory-built dry system.
Concrete (cubic metres)
Steel reinforcement (kg)
Water consumption (litres)
Labour (man-days)
45,000 bricks are entirely eliminated. Formwork reduces from 520 sqm to 40 sqm — a 92% reduction in a cost item that produces no permanent structure. River sand usage drops by 93%.
04 — Construction Timeline
The hidden cost of waiting: 8 extra months in RCC
Every major concrete pour requires 28 days of curing before the next phase can begin. In a G+1 building, there are four major pour stages — foundation, GF columns/beams, GF slab, FF structure. That is up to 16 weeks of mandatory waiting, during which the project site is idle but your EMI clock is running.
| Phase | Conventional RCC | MS+CFS Hybrid Prefab |
|---|---|---|
| Foundation | 6–8 weeks | 3–4 weeks |
| GF structure | 10–12 weeks | 2–3 weeks (factory-fab) |
| FF structure | 10–12 weeks | 2–3 weeks |
| Brick walls | 6–8 weeks | 1–2 weeks (CFS+board) |
| Plastering | 8–10 weeks | Not required (dry finish) |
| Curing delays | 12–16 weeks cumulative | None after foundation |
| Total timeline | 52–66 weeks (12–15 months) | 18–22 weeks (4–5 months) |
“Financing at 9% per annum, 8 extra months on a ₹48 Lakh project adds ₹2.88 Lakh in interest alone — before accounting for delayed occupancy.”
05 — Performance
Cost is only part of the story
The prefab system outperforms RCC on every measurable technical parameter for a residential building in Delhi-NCR’s climate and seismic context.
| Factor | Conventional RCC | MS+CFS Hybrid Prefab |
|---|---|---|
| Seismic safety | Heavy mass amplifies seismic force. Skilled ductile joint detailing required. | 60% lighter = 60% less seismic force. Steel ductile by nature. Bolted connections dissipate energy. |
| Thermal insulation | 230mm brick = U-value ~2.0 W/m²K. High AC load in Delhi summers. | CFS + 75mm Rockwool = U-value ~0.4 W/m²K. 5× better. 30–40% lower AC bills. |
| Construction waste | 15–20% material waste. Brick cutting, concrete spillage, plaster waste. | 2–5% waste. Factory precision. Steel 100% recyclable. |
| Quality control | Site-dependent. Honeycombing in concrete common. Weather affects pours. | Factory-fabricated to mm precision. No weather dependency for superstructure. |
| Future changes | Very difficult. Wall removal needs structural approval and creates debris. | CFS partitions relocatable. Steel frame allows extensions by bolting on. |
| Residual value | Near zero. Demolition costs ₹200–400/sqft. Rubble is a liability. | Steel frame scrap value ₹35–40/kg. CFS panels can be dismantled and reused. |
06 — Analysis
Three reasons RCC costs more than it should
1. Formwork is dead money. Formwork accounts for ₹4.55 Lakh in the RCC estimate — nearly 13% of the total structural cost. This material and labour produces no permanent structure. In the prefab system there is no formwork for the superstructure because steel members are factory-fabricated and bolted on site.
2. Dead load drives up everything. RCC uses concrete and brick for walls — heavy materials that carry no structural load in a residential building. All that dead weight must be supported by the foundation, which must therefore be larger, deeper, and more expensive. In the prefab system, lightweight CFS wall panels carry only their own weight; the MS frame handles all structural loads independently.
3. Labour intensity across 12+ months. Conventional RCC requires skilled masons, bar-benders, formwork carpenters, plasterers, and labourers simultaneously across a 12-month programme. The hybrid prefab system needs welders and fitters for 4–5 months. Total labour cost in RCC is 40–50% higher due to both the longer programme and larger workforce.
Our recommendation: MS+CFS Hybrid Prefab
The MS+CFS hybrid system saves ₹8.02 Lakh and completes 8–10 months faster — while delivering superior seismic safety, 5× better thermal insulation, and near-zero construction waste. For a G+1 residence in Delhi-NCR, the case for conventional RCC rests on familiarity alone, not performance or value.
Get a site-specific quotation →This report is prepared for informational purposes. All rates are indicative for Delhi-NCR as of Q1 2026 and may vary by site conditions, soil type, and specification changes. A structural engineer should be engaged before construction commencement. Photos: Pexels (CC0 licence).