
3 hotels in Markham hold Green Key certification. Each one is audited by an outside body, on a schedule it does not set itself.
Wikimedia CommonsMarriott MarkhamSophisticated upscale hotel in Markham, featuring contemporary design and a professional atmosphere. Offers refined guest rooms, an indoor pool, and cIndependently certified
Wikimedia CommonsHilton Toronto/Markham Suites Conference Centre & SpaLuxury all-suite hotel and conference center in Markham, featuring sophisticated accommodations and a full-service spa. Offers extensive event facilitIndependently 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.