01 Residential
Coastal House
A calm summer house where sea light moves through the rooms all day.
View Project
Interior Architecture Studio — Istanbul
Timeless interiors shaped by simplicity, materiality, and atmosphere.
Defne Kayaş designs interiors where light, proportion, and natural materials meet in quiet balance — simple, honest, and made to grow more beautiful with time.
Studio
Interiors are not only seen; they are felt, lived in, and remembered.
For Defne Kayaş, design begins with the life that unfolds inside a space. Each project takes shape by listening — to how light travels through the day, how a morning begins, how a room brings people together. The result is calm, considered interiors that feel like they belong to those who live in them, and grow more beautiful with time.
About Defne Kayaş →Selected Projects
Spaces designed to be lived in
02 Hospitality
Maden Hotel
A twelve-room boutique stay gathered around a stone courtyard.
View Project
03 Commercial
Atelier Showroom
A showroom that presents a furniture brand's pieces on a quiet stage.
View Project
04 Residential
Pera Apartment
The transformation of a historic apartment into a contemporary family home.
View ProjectApproach
Every detail, chosen to support the way people live.
People are at the centre of our work. Design decisions are grounded in comfort, proportion, and the honesty of materials.
- 01
Human Comfort
Design begins with the human body and its daily movements. Proportion, height, and distance make comfort quietly possible.
- 02
Material Sensitivity
Each material is used honestly, with its own character. Tactile, natural surfaces that grow more beautiful over time are preferred.
- 03
Spatial Balance
The balance between full and empty, light and shadow, movement and pause determines the calm of a space.
- 04
Timeless Character
Permanence is sought over fashion. A well-made space keeps its freshness and meaning as the years pass.
- 05
Emotional Atmosphere
A space is remembered by how it makes you feel. Light, scent, sound, and texture together build its emotion.
Services
From concept to final touch
A complete design process for residential, hospitality, and commercial interiors.
All ServicesStories
Notes on design
Simplicity Is Not Absence
A simple space is not making do with less; it is bringing the right things together in the right measure.
Read More
Stone, Wood, and the Texture of Time
We choose a material not only for how it looks on the first day but for how it will look in ten years.
Read More
The Generosity of Small Spaces
A well-considered small space is often more generous than a large but scattered one.
Read MoreContact
Let's shape a space with intention.
A new project, the reinterpretation of a space, or simply an idea — the conversation can begin here.
Contact Defne Kayaş