Only then will he or she think about the meaning and implication of every sentence. Have the contract state who is insured, by whom and for what problems. Although it may be unavoidable, you should not take possession of the house unless the insurance is in force. Include a statement regarding financial solvency of the signers. You want to know that the people building your house are not close to bankruptcy.
Some attorneys demand a performance bond from the builder.
Others stipulate that a fixed portion of the sale proceeds will be kept in escrow for six months after you move in, returnable with interest to the builder if there are no major defects or disputes. A financially shaky builder will never agree to an escrow arrangement. If you and your attorney cannot assure that the builder is financially sound, go elsewhere. You don't want to deal with someone who can't meet a payroll, let alone fix your house after you move in. Those who sign should be unambiguously responsible for everything and anyone that you do not personally contract and pay for.