About raumwert plus
raumwert plus specialises in architecture and construction. Its core services include architecture, project optimisation, owner's construction advisory, and providing second opinions.
Simon Käslin
Architect SIA and founder
With over 16 years of professional experience in the construction industry, I have built up comprehensive expertise in development, planning, and execution. From my beginnings as a structural draftsman to my position as managing director of a 15-person architectural firm, I have become familiar with all facets of the construction industry and successfully completed numerous projects.
My strength lies in reconciling the individual needs of the owner with economic efficiency. As a certified architect (SIA) , I develop tailor-made solutions through dialogue that are both functional and offer a high quality of living, while also being economically sound.
With raumwert plus, I have been forging a new path since 2025. As the founder of this specialised architectural firm, I guarantee my owners my full attention and direct, personal commitment to their construction project.
Our vision
Our vision is to unlock the full potential of every construction project, making living spaces more livable and simultaneously increasing property value and quality of life. We support owners through all phases and help them gain clarity with our expertise.
Why raumwert plus
raumwert plus represents a more nuanced view of architecture: analytical, inquisitive, and results-oriented. Ultimately, it focuses on what truly matters: spaces that enrich people and shape their everyday lives for decades to come.
Langjährige Erfahrung
In über 16 Jahren in der Bau und Architekturbranche hat raumwert plus Gründer Simon Käslin duzende Projekte von A bis Z entwickelt und betreut. Dieser Erfahrungsschatz kommt unseren Kunden zu gute.
Ganzheitliches Betrachtung
Our clients receive solutions precisely tailored to their project situation. We combine architectural expertise with an analytical approach. Our approach views architecture not only as an aesthetic concept, but also as an economic and functional system.
Consultation on equal terms
We advise building owners, property developers and investors on an equal footing. We establish long-term partnerships and work together with our owners and partners to find the perfect path to your goal.
5-star feedback
Here's what our customers say
The following feedback demonstrates how collaboration leads to sustainable project success. Read more Google reviews of raumwert plus GmbH.
Simon Käslin has supported me on several construction projects. He always does so with great professional expertise and an open, approachable manner.
Lorenz L., Zurich
The collaboration with raumwert+ was a complete success. [...] Thanks to their optimisations, we were able to gain more usable space, reduce construction costs, and increase quality – all without compromising the concept. A definite recommendation for anyone who wants to realise the full potential of their project.
Mark S., Thurgau
Simon reviewed the project for accuracy, clearly explained the key points, and drafted an objection. The construction plans were subsequently revised and adjusted. His assessment was thorough, clear, and very helpful. Highly recommended if you are looking for an independent and expert second opinion.
Balz K., St. Gallen
We first used raumwert plus's free basic screening to have our project reviewed from a fresh perspective. Even then, Simon clearly showed us where there was still untapped potential: especially in space utilization and construction costs. After that, the 360° project optimization went into much greater detail with tangible results: more usable space, smarter structures, and reduced costs. [...] For us , a clear win, both in terms of content and finances.
Franziska S., Zurich
