About Φ

Phi Studio is a Cyprus-based group of architects, established in 2014 in Nicosia by Yiannos Tsiolis and Joanna Theodosiou, who are interested in the fields of architecture, interior design, landscape and product design.

Our name is inspired by the mathematical symbol Φ (phi). The golden ratio which serves as the foundation for the Fibonacci sequence, a mathematical series used to "decode" natural forms. This unique proportion has fascinated architects, mathematicians, artists and biologists for centuries.

Philosophy

At Φ Studio, we believe that architecture is more than just designing buildings—it’s about creating spaces that elevate the human experience. As a small studio, we cultivate a close, collaborative relationship with our clients, ensuring that each project is a shared journey. Every space we design, regardless of scale, tells a unique story, whether we are crafting a home, a commercial environment, or a product, we approach each design with thoughtfulness and precision, balancing functionality with aesthetics and sustainability.

Vision

At Φ Studio, we believe architecture should do more than just serve a purpose — it should create spaces that people connect with. We look beyond traditional ideas to explore new ways of designing environments that are both inspiring and practical. Our goal is to shape places that support well-being, reflect their surroundings, and feel meaningful to the people who use them. By integrating innovation with tradition, we strive to create architectural solutions that are timeless, environmentally responsible, and thoughtfully tailored to the unique needs of the people and places they serve.

Our Services

Our core focus is architecture—crafting personalized spaces that inspire and reflect the unique character of each project.

Architecture

We approach architecture as a thoughtful dialogue between context, function, and form. Each project is a response to its surroundings and the people it serves—designed to be enduring, efficient, and expressive. At Φ Studio, architecture is not just about building; it’s about shaping experiences and creating spaces that resonate on both a practical and emotional level.

Interior Design

Our interior design philosophy centers on clarity, materiality, and the subtle interplay between space and atmosphere. Whether integrated into our architectural projects or developed in collaboration, our interiors are crafted to reflect the character of their inhabitants while enhancing the overall spatial narrative.

Landscape Design

We see landscape as an essential extension of architecture—an active layer that connects built form with nature. Our designs aim to soften boundaries, support sustainability, and create outdoor spaces that feel intuitive, engaging, and rooted in their environment.

Computational Design

Harnessing digital tools and parametric thinking, our computational design approach enables us to explore complex geometries, optimize performance, and tailor solutions with precision. It enhances creativity and control, allowing us to push design boundaries while remaining responsive to real-world constraints.

Years

350

Projects

Team

290

Clients

Meet our team

Yiannos Tsiolis

Architect / Director

B.A. (Hons), University of Portsmouth, UK | 1996–1999
Diploma in Architectural Design, Aristotle University of Thessaloniki | 1999–2001

Yiannos Tsiolis is one of the co-founders of Φ Studio. After completing his studies, he returned to Cyprus, where he worked in various architectural firms, gaining valuable experience on complex and large-scale projects. In 2014, he founded his own practice, laying the foundation for what would become Φ Studio.

Joanna Theodosiou

Architect / Director

B.Sc. in Architecture, University of Cyprus | 2006–2010
Diploma of Architect Engineer, University of Cyprus | 2010–2011
M.Arch. Graduate Architectural Design, The Bartlett School of Architecture (UCL) | 2012–2013

Joanna Theodosiou is the second co-founder of Φ Studio. Following her studies, she worked in several architectural firms in Cyprus, further developing her design skills before establishing her own practice along with Yiannos.

Stavros Demetriou

Junior Architect

M. Arch., University of Cyprus| 2019–2024

Stavros Demetriou during his studies, he gained practical experience through internships at architectural and construction firms. He joined Φ Studio as an intern in July 2024 and is currently working as a Junior Architect.

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Charithea Hadjicosti

Office Admnistration

Diploma in Executive Secretarial Studies, Global College | 2019–2020

Certificate in Secretarial and Office Administration Studies, Global College | 2018–2019

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Charithea has received her education in Secretarial Studies from Global College and since June 2025 works as an office administrator at Φ Studio.

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Let’s make your dream a reality!

Get in touch with us today and begin your journey!

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