The toilet pan connecter did not have a rubber seal and water splashed out into the homeowners wardrobe every time the toilet was flushed. Pipes were also found to not have been connected properly.
Plumbers, Gasfitters and Drainlayers Board chief executive Martin Sawyers said defective plumbing could cause serious disease and damage to a home.
"There are serious health and safety risks associated with sanitary plumbing carried out by an unauthorised person."
He said homeowners needed to make sure any tradespeople carrying out plumbing, gasfitting and drainlaying were registered as unauthorised work posed a health and safety risk and may not be covered by insurance.
Legitimate tradespeople authorised by the board are required to produce a licence card which homeowners could ask to see.
On its website, Shams Construction Works says it does "a wide variety of work ranging from construction of houses to many other things related to it" . Work listed on the site includes bathroom and kitchen renovations and concreting.
Mr Ali told the Herald he had accepted the judge's decision and had no plans to challenge it.
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