$100-$200 an hour when you are not buying product through them to be able to get a markup on it. Minimum hours would apply.

I've paid $50/hour. I have hired one designer who hired the trades and ordered the materials often from places that were just open to designers. She then charged a percentage of those costs as her fee.

Mine has been $75/hour. That is her 1/2 price friend discount. That being said, she doesn't charge me when we have small talk and catch up with each others' families.

An interior designer who works with our builder is helping us with interior selections. 10 hours are included in the price of the home, additional time is $100/hour.