Business Details
Luxury Interior Design Services in Sussex & London
Jonathan Sethna Interiors is a luxury interior design company based in Sussex, specialising in transforming residential and commercial spaces across London, Surrey, Mayfair, Chichester, Brighton and Hove. Our approach prioritises client collaboration, blending personal vision with expert craftsmanship to create spaces that reflect individuality and sophistication. With over two decades of experience, we combine honesty, integrity, and technical precision to deliver bespoke design solutions tailored to both modern and heritage properties.Our services span concept design, detailed architectural detailing, and project management, ensuring seamless execution from initial ideas to final styling. Recognised for our ability to harmonise traditional elements with contemporary aesthetics, we serve clients seeking timeless elegance in both private residences and commercial environments.
Services
Residential Interior Design
Commercial Design
Heritage Projects
Office Renovations
Bespoke Joinery
Highlights and features
- We offer 20+ years of expertise in luxury residential and commercial design.
- Our process combines client vision with technical precision for tailored outcomes.
- Specialists in heritage properties, preserving historical integrity with modern functionality.
- Serving London, Surrey, and Sussex with a focus on personal service.
- Award-winning designs featured in prestigious locations like Knightsbridge and Kensington.
What people say
Exceptional professionalism
Creative designs
High-quality results
Attention to detail
Client-focused approach
Services
Residential Interior Design
Crafting bespoke living spaces that reflect personal style while optimising functionality. Our Sussex-based team specialises in luxury homes across London, Surrey, and Brighton. We focus on seamless integration of architectural detailing, lighting, and bespoke joinery to create timeless environments. Projects range from single-room renovations to full mansion transformations, always prioritising client vision and practical needs.
Commercial Design
Creating impactful commercial environments for restaurants, bars, and offices. Our designs enhance brand identity while ensuring operational efficiency. Recent projects include luxury dining venues in Knightsbridge and contemporary workspaces in Chichester. We balance aesthetic appeal with practical considerations like customer flow and staff functionality across London and Surrey locations.
Heritage Projects
Preserving architectural legacy while modernising listed buildings. Our expertise spans Mayfair townhouses and Georgian properties in Surrey. We carefully restore original features like mouldings and timberwork while introducing contemporary elements that meet modern standards, ensuring historical integrity remains intact throughout the transformation process.
Office Renovations
Transforming corporate environments to boost productivity and brand representation. Our Sussex-based team creates functional office spaces in London and Surrey that balance aesthetics with practical needs. Recent projects include heritage office conversions in Holborn and creative workspaces in Chichester, focusing on ergonomic layouts and brand-aligned design elements.
Bespoke Joinery
Crafting unique timber elements tailored to each project's aesthetic. From kitchen cabinetry to feature wall panelling, our joinery enhances both residential and commercial spaces. Each piece is designed to complement the overall scheme while maintaining exceptional craftsmanship, with recent installations in luxury properties across Kensington and Surrey.
People
Jonathan Sethna
Founder & Lead Designer
With over 20 years in luxury interior design, Jonathan combines creative vision with technical expertise. His portfolio spans Grade II listed properties and contemporary London residences, focusing on client collaboration and historical preservation.
Questions
What areas do you serve?
We specialise in Sussex, London, and Surrey, including Mayfair, Brighton and Hove, and Chichester.
Do you handle heritage building projects?
Yes, we specialise in listed buildings, preserving historical details while integrating modern functionality.
What commercial spaces do you design?
We design bars, restaurants, office spaces, and luxury apartment communal areas.
How does your design process work?
Our three-phase process includes concept development, detailed design, and construction management with client collaboration.
Can you manage full property renovations?
Yes, we handle complete renovations from structural changes to final styling for residential and commercial properties.
