About Callender Howorth
Callender Howorth offers tailored architectural interior design, build, renovation and project management services to both residential and commercial properties throughout the UK, Europe and North America. Our dedicated team of award-winning interior designers, interior architects, stylists and project managers deliver innovative and bespoke solutions to each of our clients.
Balancing creative design with constructive project planning allows us to focus on delivery in a quality service-led manner. Such an approach has made us one of the most well-known luxury architectural interior designers in the UK.
Our practice has also built a strong reputation in Europe, especially in Paris and the south of France on the Cote d’Azur where an English-speaking build team is working on our projects.
We have recently opened an office in New York and have a full design and build team for all of our assignments there.
Please view our portfolio to see how we can help you to create your perfect home.
Meet the founder
Meet Mark Howorth, an award-winning interior designer, who is considered by many to be one of the best interior designers in London.
Mark started his career living and working in Los Angeles designing high-end residential projects throughout LA and southern California. Callender Howorth has grown since then to design and manage projects throughout the UK, Paris, and the Cote d’Azur, in Manhattan and the Hamptons, and back full circle to his roots in the west coast of California with projects in Laguna Beach and Ojai.
Meet some Clients
Devonshire Mews, London, was a breathtaking project that echoed the inspirations of the clients in their own personal space. Callender Howorth worked with the owners on every-last exquisite detail.
Many visions were fulfilled during the completion of this non-archetypal London abode. The team worked with the clients to provide a sense of a charismatic living quarter. Each client’s wishes are different in every plan, our aim is to bring the client’s idealistic qualities to life, making each result profound and thoughtful.
We project managed this property in order to bring a utopian finish and detailed format to suit the client’s principle conceptions from start to finish.
Coming Soon
Marylebone, London
(Coming soon)
Paris
(Coming soon)
Ojai, California
(Coming soon)
St Georges Wharf
(Coming soon)
Saint Tropez
(Coming soon)
Villefranche-sur-Mer
(Coming soon)
Luxury Interior Designers & Architects in London
Callender Howorth © 1997-2025