horncastle:thomas is a RIBA Chartered Practice formed in 2011 in the Isle of Man by Karen Horncastle + Martyn Thomas

Both RIBA Chartered Architects: Karen has worked in the Isle of Man for over thirty years; Martyn worked for two leading architectural practices in North West England before returning home in August 2010

Both have experience working on a variety of existing and new building types, including listed and registered buildings and new buildings in conservation areas 

A belief in the value and benefits of good modern design underpins the practice's approach.  Always considering context, our environment, local Island constraints + levels of craft and combining design technology with an understanding of the past, horncastle:thomas retain an aspiration to find quality in the slightest of projects


In addition to the practice's current work, this website illustrates samples of work undertaken for previous employers + collaborators (as credited) 

We work with a great team, currently including Fariba Shaban Poor and Alex Bowers

In recent years we have enjoyed working with Andrew Traynor, Raquel Pueyo, Betty Laurincova, Patricia Tutt, Laura Jones Rania Gomaa + Finbar Samson