A summer house (also spelt summerhouse) is a small covered building in a garden, mostly used in the summer.

Summerhouse or summer house may also refer to:

• Summerhouse, County Durham, England
• Summerhouse, a brick structure located on the United States Capitol grounds
• Summerhouse Hill, Folkestone Downs, Kent, England
• Derby Summer House, building in Danver, Massachusetts, United States
• Fictional estate, setting of British crime drama, Top Boy

• "The Summerhouse", a song by the band The Divine Comedy
• Summer House (album), a 2010 album by Gold Motel
• The Summer House Sessions, a 2021 album by Don Cherry

• Summer House (2006 TV series), American sports TV series

• Summer House (2017 TV series), American reality TV series
• Summer House: Martha's Vineyard, American reality TV series
• Summer House Rules, tenth episode of American reality TV series Vanderpump Rules

• The Summer House, a 2018 French drama

• Summerhouse (video game), a sandbox city building video game