Structural Design Studio Ltd is a design led Structural and Civil Engineering Consultancy based in London.  SDS was established in 2017 by founding directors Tim Botfield and Sarah Wadley.


Passion and innovation are central to the work ethic at SDS, driving us to deliver creative and practical engineering solutions with a hands-on approach. We pride ourselves on providing a prompt service with cost effective and buildable designs.  As a young and modern practice, adaptability is key to meeting the demands of the evolving construction industry; our flexible design led approach provides an excellent service to Clients, Architects and contractors alike.   


The breadth of experience at SDS ranges from large new-build developments to complicated refurbishments. Our work also covers smaller projects including domestic loft conversions, rear extensions and building surveys.





MEng (Hons) CEng MIStructE

Sarah studied Civil and Architectural Engineering at the University of Bath graduating with a First Class Honours degree. She is a fully chartered member of the IStructE and has over 10 years of design experience at Elliott Wood Ltd.


She has extensive experience in leading engineering teams for projects across residential, commercial and mixed-use building sectors delivering projects up to £50 million both nationally and abroad. Amongst other key skills Sarah is an expert in subterranean engineering – specifically in the design of complex basement constructions beneath buildings in Central London including Listed properties.




MEng (Hons) CEng MIStructE

Tim studied Structural Engineering at the University of Sheffield graduating with a First Class Honours degree. He is a chartered member of the IStructE and has over 10 years of experience in the construction industry.


He has a vast range of experience in Structural Engineering and has delivered projects across all sectors. He also has experience in contracting having worked as a senior design manager for the tier 1 contractors Wates successfully delivering large scale residential developments including high rise structures. Tim’s broad knowledge of construction techniques along with his technical ability gives him a unique vantage point.






MEng (Hons) CEng MIStructE

Adam studied Civil and Structural Engineering at Swansea University graduating with a First Class Honours degree. He is a fully chartered member of the IStructE and has over 10 years of design experience.


He has worked on projects across all sectors including residential, commercial, education and healthcare and has been the lead design engineer responsible for delivering numerous projects ranging from high-end residential refurbishments to mass housing developments up to £40m.  His experience includes the structural design of many basements, school buildings and residential apartment buildings; and has allowed him to gain a vast knowledge of the practical solutions available to create efficient, economic structures.



Ed davenport

BEng (Hons)

Ed studied civil Engineering at Kingston University and graduated with a First Class Honours degree, after spending 12 years working in the financial sector. He joined SDS in 2019 and has 7 years structural design experience predominantly in the high-end residential and education sectors.


He has had involvement in the delivery of a broad range of projects, from the refurbishment of existing buildings and houses, to the design of new-build school developments and construction of basement extensions beneath existing properties in Central London.




MSc BEng (Hons)

Taha studied her Bachelors of Civil Engineering at the Nottingham Trent University and her Masters Degree at Kingston University. She is currently a graduate member of the IStructE working towards her chartership. Taha has over 6 years of postgraduate experience in structural engineering in London and has worked on both new built and refurbishment residential projects.


Her experience includes structural design of loft conversions, extensions, basements and small to medium sized new build structures. She has been involved in projects from concept to construction stages, working closely with architects to meet client’s requirements.


Taha has joined SDS in 2020 with extensive experience in residential refurbishments



Bianca-Alexandra Tripsa

MSc BEng (Hons)

Bianca studied her Bachelors of Civil Engineering and Masters Degree of Structural Engineering at the Technical University of Cluj-Napoca. She is currently a graduate member of the IStructE, with over 5 years of design experience in London, working towards her chartership.


She has worked in the residential, commercial and mixed-use building sectors and has delivered projects up to £6 million nationally. The projects have been both refurbishments and new-builds and she has been involved in the projects in all stages, especially the construction stage, which has allowed her to gain a clear understanding of finding suitable solutions for unforeseen circumstances on site.


Michael Mbomena

PG Dip, BSc (Hons)

Michael is a professional and versatile Structural Engineer with strong working knowledge of key engineering theories and practices developed through extensive experience in building structures.

He graduated from London South Bank University with a BSc(Hons) in Architectural Engineering and a Post Graduate Diploma in Structural Engineering. The mixture of the two disciplines enables Michael to bring together the creativity of building design, the precision of engineering analysis and the skills of construction, management, and finance.


Michael has over five years’ experience working on various domestic properties including new builds and renovations. He also has considerable expertise in the design of historic properties.