For four decades, the Sonnenbau Group, based in Diepoldsau, has been successfully active in the real estate market in the Rhine Valley and neighbouring regions, and our 35 employees will provide you with competent advice on all your real estate needs.

Our task is to achieve the best possible price for your property on the market. To this end, we have the necessary expertise and respond individually to your needs and concerns. As a regionally anchored company, we have a broad network and access to current market data and comparative values.

Thanks to our many years of management and administration experience, we can assist you with the initial leasing of your new property, the re-leasing of your flat or your office or commercial space.

Management and administration
We currently manage around 700 flats and over 140,000 m2 of office and commercial space. We also manage 60 condominium owners’ associations. In addition to day-to-day business, technical management is an essential part of our work. We develop renovation, conversion or refurbishment concepts and always keep an eye on long-term value retention and returns. We also advise and support our clients in the establishment of condominiums.

Real estate evaluation
Our proven experts have the knowledge and skills to professionally accompany properties in every phase of their life cycle. Whether for a building plot, your single-family or multi-family house, a business property or even a special property – we have the know-how and the experience to prepare a well-founded appraisal.

Construction services
Our proven experts have the knowledge and skills to professionally accompany properties in every phase of their life cycle. We support you in the development of your building project, the conversion of existing properties in the residential and commercial sectors as well as in the overbuilding of your building land parcel.

Real estate investment
CasaInvest Rheintal AG, the leading real estate investment company in the Rhine Valley, is also based under the umbrella of the Sonnenbau Group. It owns and manages a real estate portfolio of around CHF 300 million and currently offers indirect real estate investment opportunities to around 500 shareholders.

Our know-how is your benefit. Since 1980.

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