Fence height on top of retaining wall

[JayBo1979]

Hi guys

we live in a corner plot and the garden at the side and front of the house is on a slope so it’s approx 60-80cm lower at street level than the main garden.

 

we want to level out and build up the garden and build a 60-80cm retaining wall. we then want to put a fence on top for privacy 

 

my understanding is that without PP the fence can be upto 1m (as it’s by a public highway) but is this measured from street level or the level of the ground in the inside of the fence (which we have built up). 

 

This obviously makes a massive difference as if it’s measured from street level and the retaining wall is 80cm then we’d only be able to have a 20cm fence!

 

thanks

 

J