Capability Brown cannot be identified as the originator of modern landscaping, yet he created a business that achieved an unrivaled impact, outshining those before, during, and after his lifetime. Whether Brown was a great artist, opinions may differ. However, there is evidence that Brown was an outstandingly successful businessman. From humble origins, Brown ultimately created a business that seized the lion’s share of the landscaping market of Britain’s elite in the second half of the eighteenth century, counting half of the House of Lords as his clients. A study of Brown’s surviving account book, bank ledgers, and personal correspondence provides new insight into the rapid development, vast scale, and nature of his business. This research shows that commissions were not just gained due to his skills in landscaping, but through his exceptional business acumen, his method of operations, organizational structure, focus, work ethic, and ability to develop contacts and win trust with both the aristocracy and ultimately the King of England. What emerges is a picture of Brown as an entrepreneur of considerable skill, enabling him to uniquely build a national landscaping business.