Technically, the three day attorney review period is only required in contracts that are prepared by a real estate broker (Opinion 26). The three day period begins to run when the fully executed contract is "delivered" to the parties.
Requesting changes prior to signing the contract would not negate the three day attorney review period. If it is a broker prepared contract, attorney review will remain. If, however, you are not dealing with a real estate broker but are instead negotiating directly with the builder or its attorney, then you may elect to delete the attorney review period from the contract.
My experience with new construction contracts is that the builder may negotiate price and delivery date - but will resist any substantive change to the form of contract. But, every builder is different and your results may vary.
The nominal cost of retaining an experienced real estate attorney to represent a buyer should make the decision a "no brainer". You could do the closing itself. However, if you have no experience in real estate matters, the old adage about the attorney who represents himself / herself applies. A transaction involving new construction can be much different than the sale of an existing home. There are limitations and additional concerns with new construction. I would recommend that you consult a friend or colleague who handles transactional real estate - including new construction.
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I agree with Mr. Millar.
No attorney-client relationship is created as a result of this submission. The information and answer provided is of a general advisory nature based on the limited information provided and should not be constured as formal legal advise.