Comment by vel0city

It's the "custom" part that's very expensive. If you just want some wooden boxes with doors for you to hang on the wall and paint yourself you can get those for <$200/ea. If you want a crew of people to measure your space, design cabinets specifically for your space, cut out a specific order just for your one-off design, install them, and paint them that's a lot more labor charge. Labor is way more expensive than wood.