
61 hotels in Loire Region hold Green Key certification. Each one is audited by an outside body, on a schedule it does not set itself.
Wikimedia CommonsHOTEL DE LA BRETESCHE, GOLF & SPALuxury destination resort in Missillac, featuring a magnificent 15th-century castle and a championship golf course. Offers upscale accommodations, a fIndependently certified
Wikimedia CommonsMERCURE NANTES CENTRE GAREUpscale hotel located in the heart of Nantes, featuring contemporary guest rooms and extensive event facilities. Ideally situated near the main train 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.