A few words about us

There is no project too big or too small - Give us a call

Plumb Limited (formerly Bob Laybourn Consulting Engineers), is a structural engineering practice that has been in operation since 1991, and located in Wellington New Zealand.

With 28 years combined experience in the construction industry, our mission is to provide our clients with the best possible structural engineering and project management services.

Our clients in the past have said, 'you listened to what we said and delivered a solution that worked'. Along with high quality documentation we bring a high level of communication to all our projects ensuring that there are no surprises.

At Plumb, we bring to every project the values that we would like to have shown to us. We aim to deliver high quality design solutions unique to your individual engineering and construction projects. We will ensure that the designs and advice we put forward are cost effective and value for money.

If we can not help you - rest assured we will know someone who can.


Bahjat Harach - Director


Bahjat has a Bachelor of Engineering degree from Canterbury University, and 23 years of experience as a structural engineer. He also has a Master’s in Business Administration (MBA) from Victoria University.

His experience has been gained in Wellington, working for small, medium and large engineering consultancies.

Bahjat has worked on a wide range of residential, industrial and commercial projects, ranging from house alterations to multi-storey buildings.

Bahjat previously worked for Plumb Consulting Engineers in 1999 and now returns as Director.