Mad Squirrel Brewery is an independent craft brewery based in Hemel Hempstead, England, near the Chiltern Hills. The brewery traces its origins to the mid-2000s and has gradually expanded its operations while maintaining a focus on experimentation and quality brewing. Its beer portfolio includes a core range available year-round as well as limited releases that explore new ingredients and styles. Brewing is carried out by a team that combines traditional brewing knowledge with contemporary techniques. In addition to production, Mad Squirrel operates several taprooms and supplies its beers to pubs, retailers, and hospitality venues, contributing to the broader craft beer landscape in southern England.