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Interior Spaces

Gwennan Josh is a creative, commercial interior design studio based in the Brecon Beacons, serving Wales and the South West of England.​

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Visions aren't just shaped here - they are brought to life. We design concept packages via means of mood boards, space planning and 3D sketches or CGIs, turning ideas into something real and tangible for our clients, we also provide early-stage ideas for project tenders, bids, pitches.

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We work directly with clients, fit-out companies or contractors on small, medium and large workplace and hospitality projects, and throughout the process, we stay flexible, communicative and hands-on to keep everything, transparent and enjoyable.

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Explore our site and get a feel for what we could create for you...

Residential Interior

About

Hi, I'm Rhiannon Thomas, a commercial interior architect with 18 years of shaping the aesthetics of businesses of all sizes. I'm driven by one simple belief: a great space should feel right the moment you step into it... and it should work even better than it looks.

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I blend practicality with imagination, turning complex briefs into environments that are enjoyable to be in and aligned with how a business really works. Clients often tell me I bring calm, collaborative energy and a knack for spotting opportunities they hadn't considered.

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I'm endlessly curious about how people move, connect and experience a space - and yes, I'm absolutely the person who walks into a space and immediately starts thinking about personality, flow, and atmosphere.

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If you're looking for a design that's thoughtful, creative and purposeful, you're in the right place...

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GJ_RT_Portfolio pic B&W.jpg

Gallery

I design commercial spaces that feel good the moment you walk in. Workplaces, cafés, bars, restaurants - you name it, I love creating environments that are full of character and effortless to be in. With 18 years of real-world experience and a bold dash of creativity, I help businesses build spaces that flow beautifully, spark connection and make people say, "I love it here".

Services

Shaping spaces with style, story & soul

Consultation

Every great space begins with a conversation

My consultations are open, relaxed and genuinely collaborative, whether it's a one-to-one chat or a workshop with key-stakeholders. This is where I listen to your goals, challenges and aspirations, then help you clarify the brief, explore possibilities and set a clear direction for your workplace or hospitality project. No pressure, no jargon, just honest, transparent guidance to get your project off to a strong start.

Concept Building

Where ideas come to life

Drawing on 18 years of experience in commercial interiors, I develop concepts that balance creativity with practicality. Every concept is tailored to your brand and your people, whether that's expressed through 3D sketches, mood boards, or polished CGIs. I'm with you throughout, openly sharing the thinking as it unfolds so you always feel informed, involved and inspired. The package typically includes:

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  • Space plans

  • Mood boards

  • Sketched visuals or CGIs

Design Intent

Bridging imagination and reality

Translating concepts into clear, detailed drawing packages:

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  • Finishes plans

  • Elevations

  • Furniture, Lighting & Finishes schedules

Paul Barr | Abil Office Solutions, Slough

“Working with Rhiannon was fantastic from start to finish. We were in direct competition with another contractor, and we firmly believe that Rhiannon’s interpretation of the client’s brief is what secured us the business. She transformed our ideas into a standout, compelling design concept that elevated our entire submission. Her creativity, communication, and collaborative approach made the process smooth and genuinely enjoyable. We’re incredibly grateful for her contribution and look forward to working with Rhiannon again soon".

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