Realtor & Professional House Flipper Bobby Curtis talked about the 5 House Flipping Mistakes you need to avoid. Click here for more information about Bobby.5 of the biggest mistakes to avoid when flipping a house.1.Putting in materials and finishes that don’t work.1.Find out what finishes are being used for houses selling quickly in the area. Use those.2.Consider working with a designer.2.Buying one with no good comparable houses.1.This shouldn’t be a guessing game. Work with a Realtor who can show you there are other houses like the one you want to buy that other buyers have bought for the price you need to sell yours for.2.Look for evidence of houses selling for a lot more that are in much better condition. I like to see a good size gap.3.Take surrounding houses into consideration.3.Putting the house up for sale before it’s complete. One chance to make a good first impression.1.There are many remodeled houses I have walked into with evidence of work not being complete and even door knobs falling off. No matter if that is the only doorknob loose in the house, it will BE the representation of that house.4.All D-I-Y.1.I'm sure there are some things you can do yourself, but leave the majority of it to professionals The best ones guarantee their work, and more importantly take pride in it.5.Taking too long.1.You had good intentions to flip the house in 2-3 months, and pretty soon that turned into more work than you thought, and 9-12 months later you are ready to list. Chances are, you ate up a lot of costs because it took that long.