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House construction · Construction agreement checks before you sign

Foundation extras cannot be open-ended

By the Kolo house construction team · Updated

Why — act while you have leverage

Foundation depth is the one cost nobody can fix before digging - which is exactly why it gets written as an uncapped extra. Several agreements charged for depth beyond a stated figure with no rate, no baseline measurement and no soil test anywhere in the scope.

What — examine the details

What to look at

  • A soil test in the scope, before foundation pricing
  • A rate per unit depth for anything beyond the assumed founding level
  • Who measures the extra, and how it is recorded
How

How to check it yourself

If the agreement fixes a founding depth and charges beyond it, insist on three things: a soil test before the price is agreed, a stated rate for the extra depth, and a measurement method for how the extra is calculated. A depth fixed without a soil test is a guess that you are paying to correct.

Where this comes from: IS 1904 - Code of practice for design and construction of foundations (indian standard or building code)

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