Construction Cost Estimator

A square-foot number is the fastest way to sanity-check a building budget, but the honest answer is "it depends" — on quality, on location, and on how much finishing you pile on. The Construction Cost Estimator starts from a base cost per square foot for your chosen build tier, multiplies it by a city or country cost index, and spreads the result across the real phases of construction so you can see where the money goes.

Enter the built-up area, pick a quality tier and a location multiplier, set a contingency, and the tool returns the total build cost, the effective cost per square foot, and a phase breakdown from foundation through finishes. It is a planning estimate — pair it with a bill of quantities and contractor quotes before you sign.

• Area-based estimate: Enter built-up area in square feet (or square metres, shown alongside).
• Quality tiers: Basic, Standard, Premium and Luxury base rates per ft².
• City / country index: Location multipliers from rural to high-cost international markets.
• Phase breakdown: Foundation, structure, envelope, MEP, finishes and overhead, each as a share of cost.
• Contingency control: 0–25% buffer so the total reflects real risk.
• Effective rate: The blended cost per ft² after quality and location adjustments.
• Report & export: Copy or download the estimate as text, CSV or JSON.
• Learning guide: Cost-per-ft² tables by city and country plus where budgets leak.

1. Enter the area. Total built-up area in sq ft (m² shown side by side).
2. Pick the quality tier. Basic through Luxury sets the base rate per ft².
3. Choose a location. A city/country cost index that reflects local labour and material pricing.
4. Set contingency. 10% standard, more for complex or custom work.
5. Read the result. Total, effective $/ft² and the phase split appear instantly.
6. Export. Copy or download as text, CSV or JSON for budgeting.

Example 1 — Suburban standard home. 2,000 ft² × $120 base × 1.0 index = $240,000 build, about $264,000 with 10% contingency (~$132/ft²).

Example 2 — Metro premium. Same 2,000 ft² at $180 base × 1.35 metro index = $486,000 before contingency (~$267/ft² effective).

Example 3 — Rural basic. 1,500 ft² × $80 × 0.85 rural = $102,000, ~$113,900 with 10% contingency.

Example 4 — Luxury international. 3,500 ft² × $280 × 1.8 = $1.764M before contingency — location alone adds over $1M versus a suburb.

Example 5 — Phase view. On a $300k build, structure (~30%) is ~$90k and finishes (~20%) ~$60k; contingency is the line that saves the project when surprises appear.

• Screen locations fast: Compare building the same home in a suburb versus a metro before you buy land.
• Right-size quality: See how tier choice moves the total and the $/ft².
• See the split: Foundation to finishes, so no phase is a mystery.
• Build in risk: Contingency is explicit, not hopeful.
• Plan, then quote: A defensible budget number to take to architects and builders.
• Private: No account, nothing uploaded.