La Farine Limited, located at Unit 3 Lexus House, Rosslyn Crescent, in Wealdstone, was inspected by Harrow Council on June 27.
The business, which started operating last year, was given a zero rating, indicating major improvements are needed.
Inspectors highlighted areas of concern in food handling, cleanliness, and the management of food safety.
La Farine Ltd manufactures bread, fresh pastry goods, and cakes.
A zero rating is the lowest that can be given by the Food Hygiene Rating Scheme, which is run by the Food Standards Agency in collaboration with local councils.
A five rating signifies ‘very good’.
La Farine Ltd now has the option to appeal the decision and can request another inspection once improvements have been made.
The Food Standards Agency urges businesses to display their ratings online, ensuring they are updated if the score changes following a future inspection.
