How do I bathroom / kitchen / extension? etc.

here are a few pics that I can't load in chronological order but basically going from

• house with side extension on left of pic. Ground floor built before we moved in which contained a kitchen at the rear and a garage at the front and first floor extension built by us circa 2009.
  
• ratty and rotten single pane glass and wood conservatory on rear
  
• house with conservatory removed
  
• rear extension in place
  
• extended patio in place
  
  

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