St James's House offers a total floor area of 107,150sq.ft (9,950sq.m) with an on-site secure car park for 287 vehicles. The individual floor space comprises of 12,520sq.ft (1,163sq.m) split into front and rear wings of 7,960sq.ft (740sq.m) and 4,560sq.ft (424sq.m) respectively. Space is also usually available within these floor areas for smaller leased office units ranging from 1,400 sq ft up to 7,960sq.ft (739.5sq.m).

Within the building there are a number of small suites available which range from a 1-2 person office from 125 sq ft, up to corporate clusters offering suites to accommodate 10 persons in the Managed Office floor space. These floors offer an opportunity to develop your business within St James's House before moving into leased accommodation.