ANSWER = £50,000                                                                                               

 A basic Primary school with 8 classrooms (pre-school + grades 1 - 7)
an administration block with staffroom and offices

School buildings   classrooms are usually built in blocks of 2 or 4 with office and or stockroom between each pair of rooms 
Primary school model
Zimbabwe     Total - Materials    £       38,283.50
classrooms   rooms   Labour+Contingcency    £         8,000.00
preschool  1  £          3,500.00  £          3,500.00    £       46,283.50
grade 1 1  £          3,500.00  £          3,500.00    
grade 2 1  £          3,500.00  £          3,500.00   add labour costs range from about 10% to 15% of the materials cost and a similar congingency value
grade 3 1  £          3,500.00  £          3,500.00  
grade 4 1  £          3,500.00  £          3,500.00  
grade 5 1  £          3,500.00  £          3,500.00  
grade 6 1  £          3,500.00  £          3,500.00  
grade 7 1  £          3,500.00  £          3,500.00  
  8    £        28,000.00  
          Add £7000 for a pair of teachers houses
Offices          
Head 1  £          1,400.00  £          1,400.00    
Deputy 1  £          1,400.00  £          1,400.00    
staffroom 1  £          1,400.00  £          1,400.00    
general office 1  £          1,400.00  £          1,400.00    
general stock room 1  £          1,400.00  £          1,400.00    
       £          7,000.00    
           
Furniture/classrooom          
Teacher chair 1  £              27.00  £              27.00    
Teacher Table 1  £              45.00  £              45.00    
group table 8  £              35.00  £             280.00    
group bench x2  16  £              22.00  £             352.00    
book cupboard 1  £              50.00  £              50.00    
stockroom shelving 1  £              10.00  £              10.00    
       £             764.00    
textbooks/class          
subject number required unit cost      
Maths 15  £                1.50  £              22.50    
Shona  15  £                1.50  £              22.50    
English 15  £                4.00  £              60.00    
Science 15  £                2.50  £              37.50    
price covers teachers copy      £             142.50    
7 grades x 15 x 4 subjects 420    £             997.50    
           
           
Office equipment          
not sure what costs are we have not strayed into this area yet!      £             500.00    
chair   2  £              27.00  £              54.00    
table  1  £              45.00  £              45.00    
bokcase/cupboard 1  £              50.00  £              50.00    
       £             149.00    
3 main offices      £             447.00    
staffroom           
chairs 10  £              27.00  £             270.00    
tables group style 3  £              35.00  £             105.00    
cupboards 4  £              50.00  £             200.00    
       £             575.00