About The Sill

The Sill is an iconic new building that harmoniously reflects the distinctiveness of the Northumbrian landscape in both its shape and the materials used in its construction.

Its centrepiece is a beautiful Whin Sill grass roof, planted to replicate the unique natural grasslands of the surrounding area. The Sill’s fully accessible living roof sweeps gently upwards, giving visitors a bird’s eye vantage point across one of the UK’s most magnificent landscapes and the UNESCO World Heritage Site of Hadrian’s Wall.

It’s built on the site of our previous visitor centre and YHA hostel at Once Brewed, and is named after the nearby internationally-renowned geological feature, the Great Whin Sill.

Born and Raised in Northumberland

The Sill rises from the Northumberland landscape with little impact on the environment, perfectly mirroring its inspiration; the unique landscape of the Hadrian’s Wall corridor.

Key Facts

  • 80% of the external walls of the building are finished in local materials including whin stone, sandstone and native larch.
  • 90% of the construction employment has come from within the region.
  • More than 3000 local residents helped to shape the concept of the building.