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extensions

Adding a First Floor Extension Over an Existing Ground Floor Extension

Advice Centre

Posted on March 31, 2026

Loading a first floor over an existing single-storey extension is feasible in many cases — but the foundation adequacy must be confirmed before design can proceed. Here’s what the investigation involves.

Tags: extensions, supporting

Can a Wall on Strip Foundations Be Used to Retain Ground?

Advice Centre

Posted on March 31, 2026

External walls are not automatically retaining walls. Small retaining walls can sometimes be designed without bespoke engineering — but you need to know the limits and your soil type.

Tags: extensions, supporting

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