Cleaning service is one of the fast growing sectors. Maid service, cleaning service, office cleaning and commercial cleaning service are other terms increasingly describing a specialist external service offering a specific, targeted service to people, companies, organisations and other residential properties. There has been a significant growth in the number of cleaning companies over recent years. A further expansion is expected as companies realise the benefits of hiring outside experts. The growing number of cleaning companies offers the opportunity to increase the range of services, whilst simultaneously reducing costs.