
13 hotels in Helsinki hold Green Key certification. Each one is audited by an outside body, on a schedule it does not set itself.
Wikimedia CommonsSolo Sokos Hotel HelsinkiSolo Sokos Hotel Helsinki is a hotel in Kluuvi, Southern Finland, Finlândia. The name does not clearly indicate a major chain, and the listing includeIndependently certified
Wikimedia CommonsSolo Sokos Hotel Torni HelsinkiSolo Sokos Hotel Torni Helsinki is a hotel in Kluuvi, Southern Finland, Finlândia. The name does not clearly indicate a major chain, and the listing iIndependently certified
Wikimedia CommonsHotel HelkaHotel Helka is a hotel in Finnland, Südfinnland, Finnland. The name does not clearly indicate a major chain, and the listing includes links for onlineIndependently certified
Wikimedia CommonsRadisson Blu Plaza HotelRadisson Blu Plaza Hotel is a hotel in Norwegen, Bezirk Oslo, Norwegen. The name suggests the Radisson brand, and the listing includes links for onlinIndependently certified
Wikimedia CommonsOriginal Sokos Hotel Vaakuna HelsinkiOriginal Sokos Hotel Vaakuna Helsinki is a hotel in Finlande-Méridionale, Kluuvi, Finlande. The name does not clearly indicate a major chain, and the Independently certified
Wikimedia CommonsOriginal Sokos Hotel PresidenttiOriginal Sokos Hotel Presidentti is a hotel in Kamppi, Südfinnland. The name does not clearly indicate a major chain, and the listing includes links fIndependently certified
Wikimedia CommonsRadisson Blu Aleksanteri HotelRadisson Blu Aleksanteri Hotel is a hotel in Kamppi, Südfinnland. The name suggests the Radisson brand, and the listing includes links for online bookIndependently certified
Wikimedia CommonsHotel KatajanokkaHotel Katajanokka is a hotel in Finnland, Südfinnland, Finnland. The name does not clearly indicate a major chain, and the listing includes links for Independently certifiedGreen Key audits a hotel against roughly 100 criteria, some mandatory and some scored, covering water and energy use, waste separation, cleaning chemicals, food sourcing and staff training. A hotel applies, documents each criterion, and is then visited on site. Certification runs for one year, so a hotel keeps it only by re-submitting evidence and passing another visit. It is the largest scheme in this catalogue and the one you will meet most often across Europe.
Green Key measures management practice, not carbon. A large hotel with a pool and air conditioning can hold the certificate while using far more energy per guest than an uncertified guesthouse down the road — it is being judged on whether it manages its resources deliberately, not on the size of its footprint. The scoring is also weighted towards documentation, so a hotel with good records can outscore one that quietly does better.