We sold our property through Peter and Nadine and are completely convinced by the entire process. From the first conversation to the final transfer, everything went smoothly. The many valuable tips and the expertise that was provided to us throughout the entire process were particularly helpful. We took advantage of the complete service and therefore did not have to worry about viewings or organizational tasks. Everything was handled reliably, transparently, and with great commitment. You can feel that Peter and Nadine work with a lot of passion, professionalism, and genuine enthusiasm. We felt well taken care of at all times and can wholeheartedly recommend both of them.










The collaboration with Quartett Immobilien and Ms. Gojani is always courteous and efficient. I greatly appreciate this!

















if someone can sell, then only Roberto - sure, experienced with so much patience and passion. The best decision to sell with Roberto. Always happy to do it again. THANK YOU!




We had the pleasure of working with Mr. Frank Meierhofer on the sale of our new construction project in Bülach. He sold the duplex family home extremely professionally and efficiently. We particularly appreciated his clear communication, reliability, and experience in real estate sales. Thanks to his great commitment, the houses were successfully placed in a short time. We felt well advised and supported throughout the entire process. We are very happy to recommend Mr. Meierhofer and look forward to future collaboration.
I am very impressed with the work of Mr. Sead Jakupovic. Thanks to his expertise, my apartment in Zuzwil (St. Gallen) was sold incredibly quickly. The entire process was very swift and smooth. I particularly appreciated that I was kept informed about the current status at all times and always felt "included". Mr. Jakupovic works professionally, reliably, and with great commitment – I can recommend him without reservation!
We got to know Mr. Demir as a warm, friendly, and very accommodating person. He impressed us with his good market knowledge and competence during our first meeting. It was a very easy decision for us to go the route of selling our former apartment with him. The perfect sales exposé, the consistently competent support, the communication up to the efficient conclusion at the notary were simply exemplary. Having such a broker for the management of such a transaction is simply desirable. We hold Mr. Demir in high regard and can recommend him with the best conscience and much joy.
I was accompanied by Edoardo Köppel and Köppel-Legal AG during the sale of my 2.5-room apartment on Rossweid in Sins and was very satisfied with the collaboration. The initial assessment of the apartment and the realistically achievable selling price was understandable, honest, and well-founded. The professional preparation of the sales documents and especially the successful photos made a very good impression. Throughout the entire sales process, Mr. Köppel was reliably reachable, responded quickly, and kept me informed transparently about viewings, feedback, and the next steps. I particularly appreciated his calm and solution-oriented approach with sometimes demanding interested parties, who initially backed out, later agreed again, or tried to significantly lower the price. Mr. Köppel conducted the negotiations consistently and with the necessary sensitivity. Despite these challenges, the apartment was sold at a higher price and without unnecessary complications. I felt well taken care of at all times and can recommend Edoardo Köppel and Köppel-Legal AG without reservation.