Our Story

STUDIO ROUNDHOUSE is an architectural practice based in Petts Wood, South London, founded in 2025 by Konrad Sienkiewicz. It was established following over 15 years of experience at leading UK firms - including Feilden Clegg Bradley Studios, Scott Brownrigg, jmarchitects, and cre8architecture - whose work has been recognized with RIBA and RIAS Awards, the Stirling Prize, Civic Trust Awards, and World Architecture Festival Awards.

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Konrad has contributed to a wide range of competition-winning and award-recognized projects, from residential extensions and bespoke homes to workplace and science schemes, cultural landmarks, educational buildings and campuses to large-scale masterplans. His experience spans historic city centres, UNESCO heritage sites, dark sky villages, waterfront esplanades, and complex urban plots. Over the years, he has worked with homeowners, developers, local authorities, contractors, cultural institutions, and public agencies, developing a deep understanding of the unique challenges and ambitions behind every project.

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At STUDIO ROUNDHOUSE, this expertise translates into thoughtful, high-quality architecture that balances creativity, functionality, and precision. Committed to inspiring and practical designs shaped around people, the studio approaches each project with deep understanding and meticulous detail, ensuring tailored solutions for unique client needs.