Reykjavik is one of the few capital cities where the electricity in your room and the hot water in your shower are already almost entirely renewable. Iceland's national grid runs on roughly 100% renewable power — about 70% hydropower and 30% geothermal in 2025 — and around 90% of buildings in the capital region are heated by geothermal district heating. That means a Reykjavik stay starts from a remarkably low-carbon baseline before a hotel does anything at all. The real question for travellers is which properties go further, and how to tell a verified eco-hotel from a marketing claim. This guide covers the energy context, the two certifications that matter most here — the Nordic Swan Ecolabel and Vakinn — and the practical signals of a genuinely low-carbon stay.
By the IMPT Hotels editorial team · Updated 2026-05-29
Iceland's electricity system is unusual on a global scale. National data for 2025 shows renewables supplying close to 100% of generation, split roughly 70.5% hydropower and 29.4% geothermal, with only about 0.1% from fossil fuels. For a hotel guest, that means lighting, lifts, kitchens and heating systems draw on a grid that is effectively decarbonised at source — a stark contrast to most destinations, where a hotel's electricity footprint depends heavily on a fossil-leaning national grid.
Heating is where Reykjavik is genuinely distinctive. The municipal utility Veitur runs a district-heating network supplied by geothermal fields and cogeneration plants at Hellisheiði and Nesjavellir, delivering naturally heated water to more than 200,000 residents in the capital region. Around 90% of buildings in Iceland are heated this way, with the remainder using electricity that itself comes from hydro and geothermal sources. So the hot water and space heating in most Reykjavik hotels are low-carbon by default.
This matters because, across the global hotel industry, energy use for heating, cooling and electricity is typically the single largest driver of a property's carbon footprint. In Reykjavik, that dominant factor is already largely clean — which shifts the sustainability conversation toward the things a hotel actually controls: water use, waste, food sourcing, chemicals, construction and how it handles the emissions it can't yet eliminate.
Two labels carry the most weight for accommodation in Reykjavik, and both involve independent verification rather than self-declaration.
The Nordic Swan Ecolabel is the official environmental label of the Nordic countries and one of the more demanding hotel certifications in Europe. Its hotel criteria include 44 mandatory requirements: properties must meet limit values for energy use per square metre, water consumption and unsorted waste; they cannot heat with fossil oil or gas; they must use eco-labelled cleaning, laundry and dishwashing products; and they must serve a minimum share of organic food and cut single-use disposables. Certification involves on-site inspection, and licensed hotels face annual follow-ups and staff training to keep the label.
Vakinn is Iceland's own official quality and environmental certification, run by the Icelandic Tourist Board. Its criteria span four areas — information, management and human resources, safety and hygiene, and environment — and the scheme was built drawing on ISO standards, Hotelstars.eu, the Adventure Travel Trade Association and the Global Sustainable Tourism Council (GSTC). Vakinn-certified businesses are audited once a year, and the environmental track comes with an action-plan checklist that maps a company's progress toward more sustainable operations.
It helps to understand where GSTC fits. The Global Sustainable Tourism Council does not certify hotels directly; it accredits the certification bodies and recognises standards that meet its baseline. Its hotel framework is organised around four themes: sustainability management, social and economic benefits to local communities, cultural heritage, and environmental impact. When a label is described as 'GSTC-recognised', it means the standard has been benchmarked against that internationally agreed framework — a useful credibility check for any eco-claim.
Beyond the certifications, a handful of operational signals separate a substantively sustainable hotel from a greenwashed one. Use these as a checklist when comparing properties.
Because Reykjavik's energy is already clean, the most meaningful differences often lie in water and waste. Geothermal hot water is abundant, but it is still a managed resource, and certified hotels track consumption against benchmarks. Look for towel-and-linen reuse schemes that are genuinely optional rather than coercive, visible waste-sorting for guests, and a stated policy on cutting single-use plastics in rooms and at breakfast.
Food is a large and often overlooked share of a stay's footprint. Properties that source local Icelandic produce, fish and lamb, offer plant-forward options, and have routines to prevent food waste are doing something concrete — and the Nordic Swan explicitly rewards organic sourcing and waste-prevention routines.
A small number of Reykjavik properties hold recognised labels and can be verified through their certifying bodies. The Grand Hotel Reykjavík was the first hotel in the Icelandair Hotels group to earn the Nordic Swan Ecolabel, conforming to the Nordic Ecolabel's hotel criteria. Among budget and mid-range options, three Reykjavík hostels — Reykjavík City Hostel, Loft and Reykjavík Downtown Hostel — also carry the Nordic Swan, showing that verified sustainability is not limited to upper-tier properties.
Rather than relying on a hotel's own website wording, confirm a current licence directly. The Nordic Swan Ecolabel maintains a public register of licensed products and services, and Vakinn lists its certified companies through the Icelandic Tourist Board. If a property's claim cannot be matched to an entry in one of these registers, treat the eco-label as UN-backed marketing.
One area that demands extra scrutiny is carbon offsetting. Iceland's government and tourist board have set a goal of making the country carbon neutral by 2040, and many tour operators and some hotels offer offsets — frequently via tree-planting schemes. Quality varies sharply. Independent reporting has noted that Iceland's long-standing afforestation fund Kolviður does not hold formally certified carbon credits against core international frameworks, whereas newer Icelandic afforestation work is being developed under the Verra Verified Carbon Standard. If offsetting is part of a hotel's pitch, the credible question is simple: which registered standard backs these credits?
The biggest single lever for a Reykjavik trip is usually the flight, not the hotel — air travel typically dwarfs the on-the-ground footprint of a stay heated by geothermal water and powered by hydro. That makes it worth pairing a longer, well-chosen stay with deliberate emissions handling rather than a string of short hops.
On the ground, the lowest-impact choices are unglamorous but effective: stay central and walk Reykjavik's compact core, use the city bus network, and favour group transfers over private cars to the Blue Lagoon or Golden Circle. Reusable water bottles make sense here for a practical reason as well as an environmental one — Reykjavik's cold tap water is glacial and high quality, so bottled water is rarely necessary.
For the booking itself, choosing a certified property is the most reliable way to ensure your money supports verified environmental practice. Platforms can add a further layer: IMPT Hotels (impthotels.com) is a carbon-neutral booking platform where rates match booking direct, and a portion of each booking funds climate projects certified to standards such as the Verra Verified Carbon Standard and the Gold Standard. The most useful habit, whatever you book through, is to confirm the certification, check the register, and ask what standard backs any offset.
Same price as booking direct — and a share of your booking funds verified climate projects (Verra VCS & Gold Standard).
Find carbon-neutral hotels →Largely yes. Iceland's national grid runs on close to 100% renewable power — about 70% hydropower and 30% geothermal in 2025, with only around 0.1% from fossil fuels. So a hotel's electricity in Reykjavik comes from an effectively decarbonised grid. The bigger differentiators between hotels are water use, waste, food sourcing and how they handle remaining emissions.
The Nordic Swan is the official environmental label of the Nordic countries, with 44 mandatory hotel requirements covering energy, water, waste, chemicals and food, verified by on-site inspection and annual follow-ups. Vakinn is Iceland's own quality-and-environmental certification, run by the Icelandic Tourist Board, audited yearly and built on ISO, Hotelstars.eu, ATTA and GSTC guidance. Both involve independent checks rather than self-declaration.
Don't rely on the hotel's own wording. The Nordic Swan Ecolabel publishes a register of licensed products and services, and Vakinn lists certified companies via the Icelandic Tourist Board. If a property's claimed label cannot be matched to a current entry in one of those registers, treat the eco-claim as UN-backed marketing.
It depends on the standard behind them. Iceland aims to be carbon neutral by 2040, and many operators offer offsets, often via tree planting. Quality varies: reporting has noted that the long-standing Kolviður fund does not hold formally certified credits against core international frameworks, while newer Icelandic afforestation is being developed under the Verra Verified Carbon Standard. Always ask which registered standard the credits meet.
The accommodation part starts very low-carbon thanks to geothermal heating and a renewable grid, but the flight to Iceland is usually the largest part of a trip's footprint. To keep the overall impact low, choose a certified property, stay central and use public transport or group transfers, and handle flight emissions through credibly certified offsetting.