The Scottish Tourist Board assessment is on quality of self-catering accommodation in Scotland, rather than on the size or range of facilities on offer.
VisitScotland, previously known as the Scottish Tourist Board, has a star system to assess standards for tourists and visitors to Scotland. 5 star is the top level of excellence. You can view Visit Scotland.com for further tourist board grading information.
The assessment of self-catering holiday accommodation gives an indication of cleanliness, hospitality, service, ambience and accommodation standard. There is a scale of 1-5 Stars, and gives reassurance about the quality you can expect before you arrive at your Scottish holiday accommodation. Many cottages have been graded by the STB, it is not a criteria for being listed on this site, but you may find it helpful and reassuring to note the following;
Visit Scotland also access self-catering properties for those with mobility impairment requiring disabled access.