ICF vs Stick Built Cost Calculator

How to use this calculator (without fooling yourself)

This calculator answers one specific question: over a 25-year mortgage, does the ICF premium pay back? The number it spits out depends on three things you control — house size, design complexity, and your own assumptions about energy prices — plus a few things the market controls (concrete pricing, insurance rates, and how cold the winter actually turns out to be).

It's not a quote. It's a directional answer based on real Ontario data. Treat it like a flashlight, not a contract.

What this calculator uses (and why)

• $375/sq.ft. base stick-built cost. Mid-market Ontario custom home, 2026 pricing. GTA and waterfront work runs $420–$575+/sq.ft. easily; rural Simcoe County tends to land closer to the middle of that range.
• 5–15% ICF premium. The premium scales with design complexity. Simple rectangles are the small premium; curved walls and feature ceilings are the big one. This isn’t marketing — it’s actual labour-hour math.
• 42% ICF energy savings (Zone 5–6). Based on cold-climate studies for Southern Ontario’s heating-dominated regions. Your specific savings depend on glazing, mechanical, and how religiously you set the thermostat back at night.
• 5%/year energy cost inflation. Ontario hydro rose 30%+ in late 2025. Enbridge Gas raised rates 5.8–11.3% in January 2026. A 5% long-run assumption is conservative.
• 10% insurance discount + $350/year maintenance savings. Many Ontario insurers discount ICF for fire and mould resistance. Ask your broker. Maintenance savings come from no exterior wall rot, no termite issues, and longer paint/siding cycles.

What this calculator doesn’t do

• It doesn’t cost out your wall package — for the project-specific wall number, use the ICF cost calculator.
• It doesn’t handle site work (excavation, drainage, well, septic), permits, or finishes. Those scale independently of wall system.
• It doesn’t price your specific contractor’s overhead and profit (typically 15–20%).
• It doesn’t tell you whether your specific 25-year story will play out exactly like the model. Energy prices, occupancy patterns, and weather will all wobble.

Where the 25-year math gets interesting

For a typical 2,000 sq.ft. Ontario custom home with average complexity, the ICF premium usually lands in the $40,000–$60,000 range. The annual savings (energy + insurance + maintenance) typically run $2,500–$4,000/year. That puts the break-even between year 10 and year 18 for most builds — well inside a 25-year ownership window.

What moves it faster:

• Bigger homes (more wall area, more energy savings)
• Exposed sites with high heating loads (waterfront, escarpment, open prairie lots)
• Higher energy cost inflation (which has been the actual trend since 2022)
• Pairing ICF with radiant + heat pump (the envelope lets you size mechanical smaller)

What moves it slower:

• Smaller homes (fixed-cost line items don’t shrink proportionally)
• High design complexity (the ICF premium grows faster than wood-frame premium)
• Plans to sell within 5–10 years (you may not recover the premium personally)

The honest 25-year math for most Ontario long-term homeowners: ICF pays back, often comfortably. But run it for your numbers, not generic ones. That’s what this tool is for.