I'd probably erect a pergola, grow some nice climbers up and over it, have a bench or seat under it, that way your eye is drawn to the forefront rather than the extension. You could trellis the top 2 or 3 foot of the fence and train climbers up, it's all about tricking the eye, if there is lots of movement/colour/texture in front of the extension, you really won't even notice it.
Posts
I'd probably erect a pergola, grow some nice climbers up and over it, have a bench or seat under it, that way your eye is drawn to the forefront rather than the extension. You could trellis the top 2 or 3 foot of the fence and train climbers up, it's all about tricking the eye, if there is lots of movement/colour/texture in front of the extension, you really won't even notice it.