East Side Plaza Portsmouth

1 Gunwharf Quays, also known as East Side Plaza Tower or the Gunwharf Tower Building, is a tall residential building with 29 floors, located at the Gunwharf Quays shopping complex in Portsmouth, Hampshire, England. It is commonly referred to as The Lipstick because of its shape, and was completed in 2008. It has a Brasserie Blanc restaurant at its base. As of 2025 it is the second-tallest structure in Portsmouth, after the tall Spinnaker Tower.
The tower was the flagship of a three-part project that consisted of The Blue Building, The Crescent and The East Size Plaza tower. The £50 million project was completed in 2010.
The building also won Best Urban Regeneration Housing Scheme in 2004.