Buying a house isn't as simple as handing over your credit card and taking home your purchase. Homebuying (and selling for that matter) are complicated legal transactions subject to state and local regulations. An experienced real estate lawyer can guide you through the step-by-step process of closing on your home. You could do all the complex paperwork yourself, but it will be extremely time-consuming and if you don't file various permits and financial documents properly, it could cost you the sale.