Boundary wall need reconstruct

Sort out difference amicably, if any.

It is not a legal issue for consideration and obligation of experts on this platform. 

Explore the possibility of construction from your side, except plastering on that side, construction of such a wall is possible.  Once if the wall side on his side looks ugly, he may ask you to get it plastered for a better look.  Ask your mason for possibilities instead of going for a fight with neighbour.

If you go to court, it may take years before lowest Court gives a Judgement and it's open for appeals.

Therefore involve local community elders and get the matter resolved amicably with your neighbour.

You have the option to place the matters before the adalat functioning at the Taluks/District level. Visit the local court and the para legal volunteers will offer you the necessary assistance.