Unfortunately, Labradoodles don't always have hypoallergenic coats. However, Australian Labradoodles can have wool or fleece coats, which are better for people with allergies and that’s all I know so far.
If you are looking for a hypoallergenic dog why not try the Affenpinscher. Like many of the wiry-haired dogs on this list, Affenpinschers are great for allergy sufferers because of their low-maintenance coats. Affenpinscher’s wiry coats do not grow quickly and they’re not big shedders.