How should I respond to a code enforcement letter?

Question Details:

My family and I moved into a new neighborhood about 4 weeks ago. We received a letter today from the code enforcer which accused my husband of running a vehicle repair business from his garage. The next door neighbor reported that there have been 4-5 vehicles in my driveway in the evening and/or on weekends and has once heard a “grinding” noise and an air compressor. Would it be better to have an attorney draft a response to this letter? My husband and I are both professionals and these kind of accusations may jeopardize our careers. Important Notice