Basement Construction Cost Calculator

Inputs

Results update as you type.

Basement (outside size)
m
m
m
mm
mm
m
Your rates (examples: use local prices)
/m³
/m³
/m²
/m²
Basement section: digging, walls and slabBasement 44,566ground3 mmyconstructioncalculator.comNot to scale
Diagram updates as you type.

Results

Check the working before you order.

Estimated basement cost
44,566
Excavation (324.58 m³)4,869
Concrete (38.25 m³)9,563
Waterproofing (188.0 m²)3,760
Interior finishing (71.3 m²)21,375
Other items5,000
Usable floor area inside the walls71.3 m²
Cost per m² of usable floor625
Concrete: walls + slab26.25 + 12.00 m³
Excavation (bank volume)324.6 m³

Budget estimate from your rates. Ground water, rock, shoring and design fees can add a lot: get a site survey and quotes.

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Working
  1. Excavation = (L + 2 × space) × (W + 2 × space) × (depth + slab) = 324.58 m³
  2. Walls = (2(L + W) − 4t) × depth × t; slab = L × W × slab thickness; concrete = 38.25 m³
  3. Waterproofing = outside of the walls + floor = 2(L + W) × depth + L × W = 188.0 m²
  4. Excavation: 324.58 m³ × 15.00 = 4,869
  5. Concrete: 38.25 m³ × 250.00 = 9,563
  6. Waterproofing: 188.00 m² × 20.00 = 3,760
  7. Interior finishing: 71.25 m² × 300.00 = 21,375
  8. Total = 39,566 + other 5,000 = 44,566

Results are estimates for planning and material ordering only. They are not a substitute for structural design or approval by a qualified engineer. Read the full disclaimer.

Basement Construction Cost Calculator byMy Construction Calculator: free construction calculators with the working shown.