Harper Beckham has her own £100k luxury treehouse on David and Victoria Beckham's £12m Cotswolds estate.The 12 year old's parents put in planning permission just a year after purchasing the property in 2016 to build an impressive treehouse for their four children to use.The mini retreat sits on stilts in the grounds and is probably not used by the older Beckham children - Brooklyn, 24, Romeo, 21 and Cruz, 18 - leaving it down to Harper.The impressive treehouse is built around a tall oak tree and features a balcony to relax on. At the time, planning permission showed that the impressive treehouse was to cost the Beckhams around £100,000 and is 4.5m x 4.5m in length and width, and 4.275m high, covering a ground space of 15.6 square metres.