How deep should foundation be?

Jason C

Registered User
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Hi

Building a 250 sq feet single storey extension to back of house. How deep should the builders be digging the foundations?

Thanks a mil
J
 
The depth of the foundation depends on several factors -
- the bearing capacity of the soil
- the nature and make up of the soil
- the seasonal depth of the water table
- the severity of the winter soil temperature
- whether there are point loads to be dispersed
- the design of the foundation - strip, pad or raft
This is the Technical Guidance Document to Building Regulation A - Structure.

It offers useful guidance for building within certain parameters.

A competent building professional - preferably an architect or engineer with PI cover - should be retained to design the foundations.


ONQ.

[broken link removed]

All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.
 
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