Wardell Armstrong LLP (WA) was commissioned by Tullie House Museum Trust to prepare a Heritage Impact Assessment in relation to a proposed development at Tullie House Museum, Carlisle, Cumbria. The proposed development has the potential to directly impact on the surviving remains of important sub-surface archaeological deposits within a scheduled area. The loss of such remains would result in a 'major impact' on heritage significance. Historic England have already advised that additional work will be required to assess the impacts on well-preserved waterlogged remains to allow a thorough impact assessment to be undertaken prior to any decision. Scheduled Monument Consent would be required ahead of any works occurring For the designated structures of Tullie House itself and the conservation area, a limited impact on heritage significance as a result of the proposed new building is anticipated. Listed Building and Conservation Area Consent would be required ahead of any works occurring.