DPC - Advice on best height for gravel landscaping

[DIY Gal]

Hi Everyone,
I'm in the process of landscaping the front garden and would really appreciate your advice.
As you can see, there's a considerable slope from the pavement down towards the house.
I plan to level the ground between the hedge and the house (second photo) and cover with decorative gravel.
So, here are my two questions, please :
(1) Although the DPC is doing its job well, what is the ideal level for the gravel? Would you recommend that I keep four rows of bricks visible below the red brick line, or three, or ...?
(2) Would you recommend that I lay a French drain directly against the brickwork, or would that be overkill?
Thank you - really appreciate any responses.
Anna, DIY Gal

 

[StephenOak]

You are more likely to get help if you post in the appropriate section. The Moderators can move this for you. Click on 'Report' to ask for that.