STUDIO DUFFY
STUDIO DUFFY
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Studio
Studio

Shaping Environments for 30 Years

Founded in Dublin in 1994 by DIT-trained architect John Duffy, Studio Duffy (formerly John Duffy Design Group – JDDG) has spent three decades designing environments across a wide range of sectors. To mark our 30th anniversary and the evolution of our leadership team, the practice was renamed Studio Duffy to reflect our broader expertise and collaborative approach.

Our practice thrives on the interplay of ideas across diverse sectors—from the dynamic demands of hospitality and the comfort of residential spaces to the innovation required in public and exhibition design. We use our collective experience in architecture and interiors to inform every project, crafting thoughtful, integrated solutions that are tailored to client needs, whether in the public or private sector.

John Duffy's legacy in hospitality laid a strong foundation, but today, supported by a new leadership team, we are committed to design excellence across all sectors. Our collaborative approach ensures each project balances creativity with practical considerations such as sustainability, budget, and long-term value. We take pride in uncovering opportunities beyond the obvious and providing solutions to challenges clients hadn’t anticipated.

Our Services
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Architecture
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Assigned Certifier
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Design Certifier
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Disability Access Certificates (DAC)
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Expert Witness Services
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Feasibility Studies
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Fire Safety
+
Interior design
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Opinion on compliance
+
PSDP (Project Supervisor for the Design Process)
+
Planning Application Management
Our Team
Brendan Bolger
MRIAI
Managing Director
Brendan leads the day-to-day running of the practice and supports the team across all projects. Known for his approachable style and strong people skills, Brendan focuses on building a collaborative studio environment where clear communication and teamwork are central to the way the practice operates. He is committed to maintaining high standards of design and delivery while strengthening relationships with clients and project partners.
Gaye Kane
Accounts Manager
Gaye Kane has been essential to Studio Duffy's financial operations for over 10 years, managing accounts, payroll, invoicing, and supplier relationships. Her dedication to accuracy and efficiency ensures the firm's financial health and stability. Gaye's meticulous attention to detail and reliability have earned her the respect of the entire team.
Jayne Underhill
BA (Hons) Int. Arch.
Senior Interior Designer
Jayne Underhill, Senior Interior Designer at Studio Duffy, has over 20 years of hospitality design experience, including international projects. She specialises in creating functional, creative spaces for top Dublin gastro pubs and restaurants. Jayne excels at translating client visions into exceptional interiors with attention to detail.
Jennifer Spac
BA (Hons) Int. Arch.
Interior Architect
Jennifer is an Interior Architect at Studio Duffy, known for her creative approach to hospitality and residential interiors. Inspired by nature and sustainability, she creates functional, beautiful spaces that reflect client needs. Jennifer’s technical expertise and collaboration make her a key contributor to the firm’s reputation for high-quality design.
John Duffy
FRIAI
Consultant
John founded Studio Duffy over 30 years ago, establishing a practice known for thoughtful design and long-standing client relationships. Under his leadership, the studio grew into one of Ireland’s respected design firms. While no longer involved in the day-to-day running of the practice, John continues to support the studio in a consultancy capacity, offering guidance and perspective drawn from decades of experience.
Kathy Ryan
BA (Hons) Int. Arch.
Director of Interiors
With over 20 years of experience, including 10 years at Studio Duffy, Kathy oversees hospitality projects like hotels, resorts, and restaurants, both internationally and in Ireland. She values client collaboration, operational efficiency, and optimizing guest experience. Kathy’s leadership and expertise have been key in maintaining Studio Duffy’s reputation for exceptional hospitality design.
Marta Piotrowska
MRIAI
Architect
Marta plays an important role in supporting projects across the practice. Known for her organised and collaborative approach, Marta works closely with the team to develop and deliver design solutions through all stages of the process. She is committed to maintaining the studio’s high standards while contributing positively to the teamwork that underpins every project.
Naomi Murphy
MRIAI RIBA
Studio Director
Naomi Murphy, Studio Director at Studio Duffy, brings over 25 years of global architecture and design experience, specializing in hospitality for brands like Rosewood, Ritz-Carlton, and Waldorf Astoria. She excels in balancing luxury, functionality, and sustainability while fostering strong client relationships. Naomi’s leadership drives innovation and creativity, ensuring Studio Duffy’s projects exceed expectations.
Peter Adlard
BAS - BArch PrArch
Architect
Peter has over 20 years’ experience as a registered architect in South Africa, with an international career spanning the UK, US, Australia, South Africa and Ireland. He specialises in high-quality residential design, including bespoke homes, luxury hotels and conservation projects. Peter is known for delivering thoughtful, well-crafted architecture that balances context, sustainability and enduring design quality.

Shaping Environments for 30 Years

Founded in Dublin in 1994 by DIT-trained architect John Duffy, Studio Duffy (formerly John Duffy Design Group – JDDG) has spent three decades designing environments across a wide range of sectors. To mark our 30th anniversary and the evolution of our leadership team, the practice was renamed Studio Duffy to reflect our broader expertise and collaborative approach.

Our practice thrives on the interplay of ideas across diverse sectors—from the dynamic demands of hospitality and the comfort of residential spaces to the innovation required in public and exhibition design. We use our collective experience in architecture and interiors to inform every project, crafting thoughtful, integrated solutions that are tailored to client needs, whether in the public or private sector.

John Duffy's legacy in hospitality laid a strong foundation, but today, supported by a new leadership team, we are committed to design excellence across all sectors. Our collaborative approach ensures each project balances creativity with practical considerations such as sustainability, budget, and long-term value. We take pride in uncovering opportunities beyond the obvious and providing solutions to challenges clients hadn’t anticipated.

Our Services
+
Architecture
+
Assigned Certifier
+
Design Certifier
+
Disability Access Certificates (DAC)
+
Expert Witness Services
+
Feasibility Studies
+
Fire Safety
+
Interior design
+
M&E
+
Opinion on compliance
+
PSDP (Project Supervisor for the Design Process)
+
Planning Application Management
+
Project Management
Our Team
Brendan Bolger
MRIAI
Managing Director
Brendan leads the day-to-day running of the practice and supports the team across all projects. Known for his approachable style and strong people skills, Brendan focuses on building a collaborative studio environment where clear communication and teamwork are central to the way the practice operates. He is committed to maintaining high standards of design and delivery while strengthening relationships with clients and project partners.
Gaye Kane
Accounts Manager
Gaye Kane has been essential to Studio Duffy's financial operations for over 10 years, managing accounts, payroll, invoicing, and supplier relationships. Her dedication to accuracy and efficiency ensures the firm's financial health and stability. Gaye's meticulous attention to detail and reliability have earned her the respect of the entire team.
Jayne Underhill
BA (Hons) Int. Arch.
Senior Interior Designer
Jayne Underhill, Senior Interior Designer at Studio Duffy, has over 20 years of hospitality design experience, including international projects. She specialises in creating functional, creative spaces for top Dublin gastro pubs and restaurants. Jayne excels at translating client visions into exceptional interiors with attention to detail.
Jennifer Spac
BA (Hons) Int. Arch.
Interior Architect
Jennifer is an Interior Architect at Studio Duffy, known for her creative approach to hospitality and residential interiors. Inspired by nature and sustainability, she creates functional, beautiful spaces that reflect client needs. Jennifer’s technical expertise and collaboration make her a key contributor to the firm’s reputation for high-quality design.
John Duffy
FRIAI
Consultant
John founded Studio Duffy over 30 years ago, establishing a practice known for thoughtful design and long-standing client relationships. Under his leadership, the studio grew into one of Ireland’s respected design firms. While no longer involved in the day-to-day running of the practice, John continues to support the studio in a consultancy capacity, offering guidance and perspective drawn from decades of experience.
Kathy Ryan
BA (Hons) Int. Arch.
Director of Interiors
With over 20 years of experience, including 10 years at Studio Duffy, Kathy oversees hospitality projects like hotels, resorts, and restaurants, both internationally and in Ireland. She values client collaboration, operational efficiency, and optimizing guest experience. Kathy’s leadership and expertise have been key in maintaining Studio Duffy’s reputation for exceptional hospitality design.
Marta Piotrowska
MRIAI
Architect
Marta plays an important role in supporting projects across the practice. Known for her organised and collaborative approach, Marta works closely with the team to develop and deliver design solutions through all stages of the process. She is committed to maintaining the studio’s high standards while contributing positively to the teamwork that underpins every project.
Naomi Murphy
MRIAI RIBA
Studio Director
Naomi Murphy, Studio Director at Studio Duffy, brings over 25 years of global architecture and design experience, specializing in hospitality for brands like Rosewood, Ritz-Carlton, and Waldorf Astoria. She excels in balancing luxury, functionality, and sustainability while fostering strong client relationships. Naomi’s leadership drives innovation and creativity, ensuring Studio Duffy’s projects exceed expectations.
Peter Adlard
BAS - BArch PrArch
Architect
Peter has over 20 years’ experience as a registered architect in South Africa, with an international career spanning the UK, US, Australia, South Africa and Ireland. He specialises in high-quality residential design, including bespoke homes, luxury hotels and conservation projects. Peter is known for delivering thoughtful, well-crafted architecture that balances context, sustainability and enduring design quality.
STUDIO DUFFY
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Studio
InteriorsArchitecture