1031 advice would be appreciated!

[Brett Lee]

I have 2 houses on 1 lot in the Seattle area i am planning on sell and reinvest in another house. I am probably selling our houses for around $325k and the house i am planning to purchase is 280k. My understanding is the new house purchase needs to be more then what i sell hoyse for. However i saw that there is some sort of construction provision that allows a person to use some of equity on new house. Wondering if anyone has advice on whether this would work with 1031 exchange? Also any tax experts who specialize in 1031 exchanges would be appreciated!