About Arch Design

Design, Construction & Beyond

Arch Design SL Ltd is an Architecture, Project Management and Construction firm founded in 2015.

With an arsenal of architects, engineers, lawyers and project managers at our disposal; and a wealth of experience – having undertaken projects in Sierra Leone, The Gambia, Germany, Guinea and across the globe,  we are your one stop for all design and building needs, providing turn-key solutions from architectural design to construction to interior design to final fittings.

Quality Construction, Honest service, Great value!

Driven by a commitment to excellence and a penchant for innovation, Arch Design SL works towards creating distinctive architectural projects rich in both character and functionality.

Far from simply regurgitating existing designs, our designs reflect the process of history while adapting to modern contexts, conveying a meaningfully distinct sense of architectural continuity – a presence that draws on both historic precedence and the influence of modern design.

Above all, we seek to build that which adds meaning to our changing lives, placing the desires and experiences of individuals as occupants, visitors and even passers-by at the heart of our architectural compositions. Seamlessly blending the old and the new,


Building the future… today.


B.Eng. Architecture

M.A Process Architecture – Architecture and Resources

Project Management, Project Development

Kathleen Jah is the co-founder and creative director of Arch Design (SL) Ltd. 

She is an architect with German-Sierra Leonean roots.

Kathleen studied Architecture at the University of Applied Sciences Mittelhessen and the Alanus University of Applied Sciences in Germany.

She holds a Bachelors Degree of Engineering in Architecture and a Master’s Degree in Architecture, Project Management and Project Development.

She is also a lecturer in the Architecture Department of the Fourah Bay College , University of Sierra Leone.



+232 78 86 16 72
+232 77 26 35 29
+232 30 71 54 12

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