The main challenges stemmed from having to take down and then rebuild the majority of the house around a few original features. This was simply caused by the age and condition of the property (which we knew and planned for in advance) and is a situation we often face.
Given this was an older property there were other works required during the rebuild for example, replacing all downstairs floors due to them being rotten (again this was anticipated in advance). All of the first floor flooring was completely renewed to complete the upgrade. The fact this project required the replacement of the entire roof was also a fair job but one which will pay dividends for years to come and enabled a substantial increase in available space. The property was fully re-wired throughout for the electrics and new internal walls were added (upstairs and downstairs) to accommodate layout changes.
Overall the house also required a full external re-render and paint with new windows and doors being installed throughout. In summary, the main challenge was effectively building a new house in place of the existing house whilst retaining the key features as per the plans.