Services useful links Forms Contact information Error retrieving bulletins Downtown Hosting Kantakaupungin Isännöinti Oy has operated for almost 30 years in the heart of Helsinki and the surrounding areas. Our company's customers are about 100 residential and commercial properties. The challenging different ages and versatility of our customer base, combined with the demanding environment, have also required us to develop our skills accordingly. Kantakaupungin Isännöinti Oy's success factors are reliability, solid professionalism and know-how. Contact information location on map Kantakaupungin Isännöinti Oy Note. The office on Kluuvikatu has changed on 31 August 2016 and the new address is Vuorikatu 5 A, 2nd floor, 00100 Helsinki phone (09) 668 9340 Office open: Mon-Fri 8.30-16.00 During the summer from June 6 to August 13: Mon-Thu 8.30-16.00 Fri 8.30-15.00 CURRENT AFFAIRS Error retrieving bulletins