New research by accountants PwC shows the outlook for London remains positive but will slow to growth of 0.4% this year and 0.3% next year thanks to a combination of week demand and increased room supply.
Global hotels company STR research shows as many as 9,000 rooms could open in London in 2018, more than the 8,000 that opened in preparation for 2012.
Average daily rate (ADR) growth will also be down to 0.2% this year, considerably less than the 4.3% seen last year.
It will take the average daily room rate to £149 in 2018 while better growth of 1.6% in 2019 will see it rise by 1.6% to £151.