I sent an email a good while ago.
Here is part of the response...
The Home Improvement Consumer Protection Act's definition of home improvement covers a wide variety of work on private residences (or the land around them) when the total price exceeds $500, including repairs, remodeling, renovations, installations, alterations, modernization, or other improvements. This broad definition would appear to cover the work described in your message.
Any person or business who offers or performs home improvements with a combined value of $5,000 per year must register with the Office of Attorney General. Additionally, the law sets forth specific contracts requirements for home improvement contracts and establishes civil and criminal enforcement remedies for violations.