Structural Engineer London

SWJ are a Structural Engineering Company serving London and the greater London area. We work with private clients specialising in new builds, and large and complex extensions including loft conversions & basements.

If you have a property in London and are planning any structural alterations to your home, a completely new build, or a complex extension such as a basement  – it is never too early to contact SWJ Consulting and talk about your project.

Increasingly London property owners, in the city and surrounding areas, are now considering basements as a way to increase living space without increasing the footprint of their property. We have the experience and the expertise to advise if a basement would be achievable for your home.

A large percentage of the costs of an extension, or new build, is in the ground. This of course is especially true of basements and swimming pools. We specialise in large and luxury residential projects for private clients to ensure their visions, and their architect’s visions are realised.

By contacting us in the early stages we can complete a feasibility study before you spend money on an architect or planning. Structural Engineers, like SWJ Consulting,  play a vital role in ensuring you can have the extension, annexe, basement or swimming pool you desire and that the plans are correctly implemented.

About SWJ Consulting

We are based in Witney, Oxfordshire – so are conveniently placed down the M40 to serve our London clients.

Contact us and talk to us about your new project. We will work with you, and your architect, to ensure the design you want is achievable. The worst outcome for a client is to fall in love with a design from your architect and then find out you need to compromise on the design because of structural concerns.

How we work

  1. We complete a site visit to identify any potential issues and check over any existing plans
  2. We will then produce initial design ideas for any feedback or questions from you and your architect
  3. Once the design is finalised we will complete detailed drawings for your contractors, architect and warranty provider


Call us today to discuss your project on 01993 225085

Project examples for private London clients

This project was a private residential one-off building built on a flood plain.  We worked with the client’s architects on a design that allowed water to run under the house without affecting the structure but didn’t require the expense of putting the house on stilts.

Basements for London Homes

This basement was designed originally to hold a turn-table for cars. Having been brought onto the project for a second opinion, we were able to alter the plans to provide a better solution that reduced the budget and delivered a large enough basement for the client’s vehicles, without a turntable.

Complex extensions for large homes

This refurbishment, extension and swimming pool project involved a complex cantilevered second-floor kitchen, as well as a swimming pool in the garden. The cantilever created uplift on the back span of the existing house which we resolved for the client.