About Us

Atellior is a master planning, architecture and interior design studio with extensive international experience in the luxury residential and hospitality sectors. Our expertise includes designing contemporary yet timeless and elegant interiors that combined with our wealth of architectural and technical knowledge, provides a complete design service.

Our residential projects are located within some of the most desirable London real-estate, including penthouses at One Blackfriars, One Tower Bridge, Chelsea Creek, Fulham Reach, London Dock and Royal Arsenal Riverside. We also work with a number of listed properties and period buildings within conservation areas in prime locations including Hyde Park and Sloane Square, within Royal Borough of Kensington and Chelsea. Our experience with the leading residential developers Berkeley Homes and St George span 20 years. We are also proud to work with other highly reputable developers including Cadogan Estate, Cheval Collection, and APML Estates. From the design of base-build interior specifications, to design and dressing of penthouses and sales & marketing suites we get involved in all aspects of interior design, dressing and styling. 

At Atellior, our expertise goes beyond architecture and interior design—we also design bespoke furniture and lighting, a key part of our creative process that we’ve passionately cultivated over the past decade. Recently, we’ve taken this passion a step further by launching our first range, A Lifestyle Collection. This carefully curated furniture line features key pieces that embody a relaxed, effortless Mediterranean style, offering an elevated yet laid-back aesthetic that reflects our design philosophy to suit both residential and hospitality projects.

At Atellior we understand hospitality and the operation of hotels. We understand luxury and we understand brands. Our wide hospitality experience includes successful interior design and architecture projects with major brands including Four Seasons, Hilton, Kerzner, Marriott, InterContinental Hotel Group, Cheval Collection, Radisson Hotel Group, Eagle Hills, Investment Corporation of Dubai, Hyatt and Accor, to name a few. Our current projects are widespread across Europe (United Kingdom, Germany, Austria, Croatia, Serbia, Bosnia and Herzegovina, and Montenegro to Morocco) and range from 5-star luxury resorts, to boutique non-branded hotels which are part of The Leading Hotels of the World, Iconic Luxury Hotels and Small Luxury Hotels of the World.

Each project is approached from scratch, drawing inspiration from current and historical site context. Our ultimate goal is to bear in mind both client requirements and end-user experience throughout our design process.

Una Barac

Executive Director
BA (Hons) DipArch RIBA

Una Barac is the Founder and Executive Director of Atellior, architecture and interior design studio.

Atellior’s recent projects include the Radisson RED hotels in Berlin and Belgrade, AC by Marriott, Palazzo Rainis Hotel & Spa (part of ‘Small Luxury Hotels of The World’), Ikador Luxury Boutique Hotel & Spa (a member of ‘The Leading Hotels of the World’), The Apartments at 11 Cadogan Gardens in London (part of ‘Iconic Luxury Hotels’), and the SIRO by Kerzner hotel brand development in Montenegro. Some notable work in the UK includes the restoration of the historic Cheval Hyde Park Gate building and the iconic Hilton hotel in Brighton, as well as Marriott projects in Manchester and Split, Croatia. Additionally, Atellior has worked on several InterContinental projects in Reading and at Manchester Airport, as well as Sales & Marketing Suites at Camden Goods Yard, Silkstream, Stephenson Street, and Trent Park in London.

Una started her career at Foster + Partners where she worked for seven years. Prior to founding Atellior Una had worked for fourteen years in hospitality and residential interiors. She headed up the Hospitality Sector and led the London and Croatian teams to design and deliver a number of successful projects. She led design and delivery of interior design at Hilton Bournemouth, funded by the founder of Ted Baker. Una also ran a number of high profile schemes for Berkeley Homes, including Chelsea Bridge Wharf, Goodman's Fields, 250 City Road, South Quay Plaza as well as The Corniche for St James. 

Una led award-winning design projects for Hampton by Hilton Park Royal which was shortlisted in Hotel Public Space Design category at SBID International Design Awards and Atellior's residential project Saffron Wharf at London Dock which won the Gold Award for Best Interior Design at the 2021 WhatHouse? The project was also shortlisted at British Homes Awards 2022, alongside Royal Arsenal Riverside luxury apartment. Additionally, Le Meridien Lav hotel won the award for Best Hotel Suite Interior at the European Property Awards 2023-2024.

Una leads the creative design process within Atellior and is currently working on a large number of luxury residential and hospitality schemes across the UK and Europe, ranging from the refurbishment and restoration of existing listed buildings to the design, fit out and dressing of spectacular new builds.

Ante Marić

Managing Director
BA (Hons) DipArch

Ante Marić is the Managing Director at Atellior. His expertise includes all aspects of feasibility, architecture and interior design through to overlooking the production of construction information.

Ante’s rich experience includes a number of high-profile hospitality projects in the Adriatic region, as well as branded hotels across Europe. This includes the 5* Boutique Hotel Ikador in Opatija, Croatia, completed in 2019, which is still recognized by guests, design, and business media as the most luxurious hotel in Croatia.

Having completed the art'otel in Zagreb, Ante is now in charge of a number of resorts and hospitality projects across the Mediterranean. These projects include the soon-to-be-completed holistic and wellness focused SIRO hotel by Kerzner in Montenegro, development of the Marina Resort Cavtat near Dubrovnik, Croatia, which features a 5* well-being hotel, 10 villas and more than 130 apartments, and The Bristol Luxury Hotels & Resorts in Tangier, Morocco, for Eagle Hills.

With 20 years of experience and a pragmatic, client-focused approach to design, Ante ensures that projects are smoothly developed and delivered, and takes care that technical knowledge and hospitality standards are set across both Atellior studios.