Syukur my flat has 990 leasehold years

Depends on the majlis and architects because if it’s terrace house, your neighbours sure to reject the proposal

Leasehold will get monetary compensation or not if gov wanna build highway

I also want to know this

leasehold cheaper, freehold more expensive

if gov wants your land to build highway, freehold or leasehold doesn't matter. compensation will be different though

leasehold needs to renew the lease when the time comes. banks won't give loan or high margin loan if the lease of the house less than certain number of years. also, if not mistaken some leasehold properties need state consent before can sell, and that takes quite a bit of time