An Upper West Side landlord routinely ignored a tenant’s pleas for repairs because she was a gentile living in a “Jewish building,” a lawsuit alleges.

Interior decorator Sharon Kibbee de Lobo claims she has endured decades of leaks from a terrace above her 16th floor West 79th Street pad.

They’ve left holes in her ceiling, damaged kitchen cabinets, rotted wood moldings and beams, ruined silk wall paper and sponge-painted walls, and led to a carpet-beetle infestation, according to her $5 million suit.

But her complaints to landlord Ennismore Apartments always seemed to fall on deaf ears.

Then she found out why, according to a Manhattan Supreme Court lawsuit.

Her complaints “were of no import to management because she lived in a ‘Jewish building’ and she had no rights as a non-Jewish tenant,” a property manager allegedly told her.

A lawyer for the landlord said he found the alleged discriminatory comment “hard to believe.”

Management has refused to let an appliance retailer install a dish washer and stove, but charged Kibbee de Lobo anyway for the appliances, prompting a housing court dispute that was settled Friday.

A store salesman told her the store has installed other appliances in the building “without getting the runaround from the landlord as they have in her case,” she claimed.