Is it permissible for the lawyer to demand his fee for a case in which he did not adhere to the deal concerning it?

He supervised construction of a high-rise belonging to him and his partners, but there was no agreement on any payment, then he asked for payment three years later

A late-payment penalty was stipulated in the event of late payment of rent by the tenant

He lives in a building and uses the visitor parking spots

Ruling on using PayPal

Working for a company which allows ads for haraam things on its web pages

Renting from a landlord who bought the property with a riba-based loan (mortgage)

Ruling on the owner stipulating that only the renter himself may use or benefit from the rented item

He got work from al-Baatin [a company] and the one who hired him cheated the company and got a lot of money as a result, then gave him some of it

She wants to bring her friend to live with her, but the landlord has already stipulated that no one should live with her