Here is how to start your own handyman business in New Hampshire. You may want to start here: How to Start a Handyman Business. You must do your own thorough research, as laws change regularly.
Here are two websites from the state of New Hampshire that will help you get your handyman business started: New Hampshire Economic Development
1. Register your handyman business name.
Find out more about registering your business name here: https://quickstart.sos.nh.gov/online/Account/LandingPage
2. Select a business structure for your handyman company.
Sole-proprietor, LLC, Partnership, Corporation, etc. Find out more here: http://www.nhsbdc.org/choosing-legal-form-your-business-0
3. Register your business.
You can find out more about registering your handyman business with the state of New Hampshire here: http://www.nhsbdc.org/register-business
4. Open a Business Checking Account.
You will need to open a separate bank account for your business with your new handyman business name.
5. Find out about taxes, hire an accountant.
You may want to file your own taxes if you are a small company. As you grow, it will be easier to have an accountant do the work. More information about taxes here: http://revenue.nh.gov/businesses/index.htm and http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/Starting-a-Business .
6. Get Liability Insurance.
7. Register as a Contractor.
You may possibly have to register as a contractor.
8. Worker’s Compensation.
9. Get Health Insurance.
Since you will be self-employed, you will need your own health insurance. If you have employees, you will need a plan that will include their health needs also.
10. City License.
You may be required to obtain a license to operate your handyman business in a particular locale, whether you are a resident, or not.
Depending on the locale, you may need to apply for permits before commencing certain types of handyman-related jobs.
12. Building Code and Inspections.
You must be aware of building codes for your particular job, and may be subject to inspections.
Depending on how many employees you have, you may need to follow OSHA regulations. http://www.osha.gov