Spaces with presence. Designed with precision.
Creating refined architecture and interiors for private residences and distinctive commercial spaces internationally.



Material, context and craft
Material as a starting point
Every project begins with a close reading of place, light and material. These conditions shape an interior that feels specific to its setting and natural to inhabit.







Detail-led by design
Joinery, finishes and bespoke elements are developed as part of the architecture, giving each space clarity, character and lasting quality.

From concept to realisation
Design intent is carried through technical development, specialist coordination and construction supervision so the finished space retains the precision of the original idea.

Work that speaks for us

From first sketch to final handover
Listen and define
We establish the brief, read the context and define the priorities that will guide every decision.
Design and develop
Concepts become spatial, material and technical proposals with the detail required to build them well.
Coordinate and deliver
Consultants, makers, suppliers and contractors are coordinated through one clear design direction.
Supervise and hand over
Construction, procurement and installation are supervised through completion, with quality protected at every stage.

A personal practice, international in outlook

As an architect, I have spent many years working across architecture, interior architecture, and interior design. Through roomseventeen, I create considered spaces shaped by context, material, and the people who inhabit them.
Based in Frankfurt and working internationally, I approach residential and commercial projects with the same attention to proportion, atmosphere and use.
From early concept through construction supervision and final handover, I remain closely involved so the original design intent is carried into every detail.
Ariane Mostert


















































