13. Support structures
This section includes construction of retaining walls and small pipe support structures for water only on private land.
More details
For large retaining wall removal, please see section 1.5. Removal of structures (exemption 50).
This also includes small pipe supporting structures on private land for water only.
The table below shows the exemptions included in this section and the professional you will need to hire.
| Description* | Exemption | Is an authorised professional legally required? | Who can provide professional advice? | |
|---|---|---|---|---|
| 13.1 | Structures supporting water pipe | 28B | No | Chartered Professional Engineer |
| 13.2 | Retaining walls not exceeding 1.5 metres depth of ground without surcharge | 20 | No | Licensed Building Practitioner or Chartered Professional Engineer |
| 13.3 | Retaining walls not exceeding 3 metres depth of ground (Chartered Professional Engineer) | 41 | Yes, for both construction and demolition | Chartered Professional Engineer |
*Owners must look at the relevant section of guidance to identify under which detailed conditions the building work qualifies for the exemption.