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Baseline Reference: Estimates are calibrated for a standard residential construction of 700–800 sq ft in the Coimbatore region. Larger areas, complex plans, multi-storey, or commercial projects will be proportionally higher. These are indicative figures only.
Project Parameters
Estimate Summary
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i3D Studio Envelope — Architectural Intelligence
Full project engagement through the i3d Studio Envelope — six specialist engines, two refinement gates, and final drawings delivered via SmartLock portal. Select a specific service below to begin, or explore the Envelope packages if you are ready for the full project.
i3D · Envelope
Starter
Brief · Climate · Landscape
₹15,000–25,000
·
Standard ★
6 engines · R2 · BOQ
₹45,000–75,000
·
Complete
D1 · D2 · D3 · 3D
₹1,20,000+
Not ready for full engagement? Select specific services below — starting rates, no commitment. Many clients begin here and step into the Envelope as their project develops.
Note: Fees shown are starting rates for standard residential projects (700–800 sq ft). Complex plans, multi-storey, renovation, and commercial projects may be quoted higher after review.
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Knowledge Library
Expert-curated construction guides — free overview for all. Unlock the comprehensive Pro guide for detailed analysis, cost comparisons, and material recommendations.
📚 Library Pro — Complete Materials Guide
Unlock a comprehensive PDF covering pros & cons of every material choice, Coimbatore market rates per sqft, soil-specific foundation recommendations, masonry selection guide, superstructure comparisons, termite & damp proofing with product specs and warranties. Curated by a registered architect with 25+ years of experience. PDF delivered via WhatsApp.
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🏗 Foundations Soil Type · Selection · Overview
🪨
Firm / Stable Soil
Isolated Footing
Most common for residential. Economical, fast, suitable for hard laterite and firm sandy clay.
Parameter
Value
Suitable Soil
Hard laterite, firm sandy clay
Bearing Capacity
>100 kN/m²
Depth
1.2m–1.8m below GL
Cost Range
₹8,000–₹18,000 per column
✓ Recommended for most Coimbatore residential sites with firm ground.
Not sure which foundation suits your site? Ask the Architect → Foundation Advisory ₹9,500
🌊
Weak / Clay / High Water Table
Pile Foundation
For soft clay, expansive black cotton soil, or high water table. Transfers load to deeper stable strata.
Parameter
Value
Suitable Soil
Soft clay, loose sand, black cotton
Pile Depth
6m–20m to hard strata
Pile Dia
300mm–450mm (bored cast-in-situ)
Cost Range
₹3,500–₹6,000 per running metre
⚠ Always require a soil bore report before specifying pile foundation.
Uncertain about your soil type? Get a Foundation Advisory → ₹9,500
🛡
Weak Soil / Large Footprint
Raft / Mat Foundation
Spreads load across entire footprint. Used when soil bearing is low or differential settlement is a concern.
Parameter
Value
Best For
Soft soil, G+2 and above
Thickness
200mm–400mm RCC slab
Cost vs Isolated
30–50% higher material cost
Advantage
Eliminates differential settlement
⚠ Requires structural engineer's design — do not attempt without calculations.
Need a full structural feasibility study? → ₹18,000
⚡
Latest Technology
Pen Foundation (Screw Pile)
Fast installation, minimal excavation. Ideal for confined sites, poor access, or time-critical projects.
Parameter
Value
Installation
Screwed in — no curing wait
Speed
3–4× faster than conventional
Best For
Confined sites, extensions
Cost
Higher upfront; saves time & excavation
✓ Emerging tech — consult architect for site suitability before specifying.
Considering this for your project? Ask the Architect → Foundation Advisory ₹9,500
🧱 Masonry Material Selection · Specs · Cost Overview
🏗
Material Comparison
AAC Block vs Red Brick vs Fly Ash Brick
The three most common masonry units in Tamil Nadu compared across weight, thermal performance, strength, and cost.
Parameter
AAC
Red Brick
Fly Ash
Size (mm)
600×200×200
190×90×90
230×110×75
Weight
Light
Heavy
Medium
Thermal
Excellent
Moderate
Good
Strength
3–4 MPa
7–8 MPa
5–6 MPa
Wall cost/sqft
₹65–80
₹55–70
₹50–65
✓ i3D Recommendation: AAC for upper floors, Red Brick for ground floor load-bearing walls.
Need help choosing the right material for your project? → Plan Review ₹3,500
🔩
Structural Choice
RCC Frame vs Load-bearing
Frame structure with plinth beams vs traditional load-bearing masonry — safety, cost, and suitability overview.
Parameter
RCC Frame
Load-bearing
Seismic Safety
High
Low–Moderate
Max Floors
G+4 and beyond
G+1 only
Cost premium
10–15% higher
Base
Flexibility
High
Low
⚠ For Coimbatore (Seismic Zone III), RCC frame strongly recommended even for G+1.
Need a structural feasibility assessment? → ₹18,000
What to fill with, how to compact, and what to strictly avoid to prevent future settlement and dampness.
Aspect
Guideline
Preferred fill
Moorum / gravel in 150mm layers
Avoid
Black cotton soil, clay, organic matter
Compaction
Plate compactor — min 95% Proctor density
DPC
150mm above Finished Ground Level
✓ Never use demolition debris or black cotton soil as fill — a common and costly mistake.
Planning a renovation? Get a scope assessment first → ₹7,500
🐜
Protection Overview
Termite & Damp Proofing
Pre-construction treatment, DPC layer, and waterproofing methods — what's required and when.
Method
When
Cost/sqft
Pre-construction termite
Before PCC
₹8–15
DPC (brick course)
Plinth level
₹20–35
Integral waterproofing
In concrete mix
₹5–10 add
External membrane
Basement/wet areas
₹60–120
⚠ Pre-construction termite treatment must be done before PCC — cannot be retrofitted effectively.
Questions about your specific site? Get a plan review → ₹3,500
More sections coming — Stone Masonry, Roofing, MEP Overview, Superstructure Materials, Interior Finishes. Unlock Library Pro for the complete detailed guide — ₹1,499 →
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