Neptune Luxury Resort on the Greek island of Kos has earned certification against Global Sustainable Tourism Council standards following an independent assessment of its environmental, social and economic practices.
The five-star resort in Mastichari was evaluated by RoyalCert, an independent certification body accredited by the Global Sustainable Tourism Council, or GSTC, to certify hotels and tour operators. RoyalCert has held GSTC accreditation since 2023, with its current worldwide scope covering hotel and accommodation certification outside China.
The distinction carries more weight than a self-declared sustainability label. GSTC sets international standards for sustainable tourism, while certification is carried out by accredited third parties assessed for competence and impartiality. Its hotel standard covers four principal areas: effective sustainability management, social and economic benefits for local communities, cultural heritage and reducing environmental impacts.
For Neptune, the certification recognises measures spanning energy and water use, waste and chemicals management, greenhouse gas emissions, biodiversity and cultural heritage, as well as the resort’s relationship with its employees, suppliers and the wider Kos community. The hotel also calculates its carbon footprint annually and monitors sustainability targets across its operations.
“This milestone reflects the commitment of Neptune Luxury Resort’s management and teams to embed sustainability across the resort’s operations, while supporting the environment, culture, local society, and economy,” said Christos Markopoulos, CEO of RoyalCert International Registrars.
Set directly on the coast near Mastichari, about 18 kilometres from Kos Town, Neptune is a substantial tourism operation with 569 rooms, suites and apartments across its resort grounds.
Its sustainability programme extends into the local economy. According to the resort, 98 per cent of its staff are Greek and 60 per cent are from Kos. Neptune also works with local suppliers and promotes local products, culture and traditions as part of its social responsibility programme.
Among those relationships is a partnership with Pandrosia, a family-run, women-led Kos producer making natural care products from ingredients including organically grown aloe, olive oil and herbs.
The collaboration began in 2022 with a welcome gift for returning Neptune guests and has since developed into From the Greek Soil to Your Essence: The Pandrosia Experience, in which guests learn about local natural resources and create their own care product with the Pandrosia team.
Neptune’s latest certification also builds on sustainability programmes already established at the property. The resort has held Travelife Gold certification since 2015 and has participated in the Blue Flag programme since 2003, alongside initiatives involving coastal clean-ups, sustainable procurement and environmental reporting.
“The GSTC certification is an important recognition of the systematic effort we have made as a team,” said Neptune Luxury Resort General Manager Costas Zarikos, who also credited sustainability consultant Maria Valerga for her contribution to the certification.
The certification comes as hotels and other tourism businesses operating in Europe face increasing scrutiny over how environmental credentials are presented to consumers.
New European Union rules aimed at tackling greenwashing will apply from 27 September 2026. The measures strengthen consumer protection against misleading environmental claims and place restrictions on sustainability labels that are not based on qualifying certification schemes or established by public authorities.
For the hospitality industry, the change raises the importance of independently verified standards at a time when terms such as “green”, “eco-friendly” and “sustainable” have become commonplace in tourism marketing.
For a large island resort, sustainability is ultimately measured less by individual gestures than by the way the entire operation functions, from water and energy consumption to procurement, employment, waste, emissions and protection of the surrounding environment.
Neptune’s certification puts those practices through an independent framework, giving the Kos resort an internationally recognised benchmark as expectations around responsible tourism continue to rise.
Photos courtesy of Neptune Luxury Resort Greece
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