I’m trying to calculate an estimate of how much the build of a 3 bedroom, 300 square meters, home would cost. I excluded the cost of land since it varies greatly depending on the location. My dream home would look like this: https://i.pinimg.com/736x/ba/78/59/ba7859ff2a4379a61ee51cc2b2c8b663--townhouse-exterior-modern-townhouse.jpg
Electricity/telephone: £10,000
Water/sewers: £5,000
Drainage: £10,000
Gas: £3,000
Foundation: 300 square meters*£150= £45,000
Columns: 300 square meters= 40 columns*£400= £16,000
Cladding: £5,000
Bricks: £1,000
Blocks: £10,000
Plastering: £5,000
Flooring: 300*£12= £5,000
Electricity: £10,000
Plumbing: £20,000
Heating: £5,000
Carpentry: £5,000
Tiling: £3,000
Roof: £5,000
Total: £160,000
Is this correct? Have I calculated some of the costs wrong? Have I missed any other major costs?