Our Work

Find out what we do

Sewer Buildover Approvals


As space continues to become a premium Walsh are finding that more and more developments are being commissioned over, or near to, existing sewers. Therefore, we have developed a specific service to guide clients through the complex process of approvals and gain those required with minimal delay.

We are able to provide a full service from initial assessment, options appraisals and value engineering, right through to detailed design and construction drawings. Our strong relationships with Thames Water and other statutory undertakers means we are often able to provide an early assessment of a site and obtain tacit approvals swiftly. This is particularly important in ‘de-risking’ a development site, especially during the due diligence process, allowing these types of project to move forward confidently.

Key Contact

Full Profile

Sewer Buildover Approvals Projects

St James Theatre

A constrained site, requiring complicated engineering design at basement level. This site had two main in-ground constraints, a brick culverted...

Read more

Indescon Court, Millharbour

A two-phase project in the London docklands which required our expertise in planning permissions and our assessment of structural complexities to...

Read more

Camden Lock Village, London

Using our expertise in modern methods of construction (MMC), Walsh are helping this high profile regeneration project to provide commercial, retail,...

Read more

Woolwich Central, London

This versatile concrete frame development is a significant step forward in the regeneration of Woolwich and demonstrated the difference that value...

Read more

St John Bosco College, South London

Using our expertise in steel structures the Walsh team developed a new purpose built school and two residential blocks in Battersea, London, within a...

Read more

Southwater Village, West Sussex

A complex infrastructure project on a large scale, focusing on improving the water output systems and resolving local flooding for the...

Read more