Construction Cleaning Experts Welcome to Avanti. Our comprehensive cleaning and maintenance services set us apart from other companies in England, and with our company being dedicated to health and safety, with our strong customer service, make choosing Avanti a decision that will give you complete peace of mind. When client engages our services, they receive from us a clear idea of what to expect in terms of continual quality assessment, managerial communication, and health and safety compliance. We value and promote friendly and professional relationships, a proactive culture, and a real spirit of co-operation.