Thank you for considering Portsmouth as a location for your business. The best resource for starting a business in NH is the NH Department of Business and Economic Affairs:
Business registration is not required at the City level, but depending on the type of business, registration is required at the Secretary of State's Office.
Learn more: NHQS
Local permits may be required for change of building use, fit-ups, land use approval and site review, and health and safety. Visit the City's Planning and Inspections and Planning Department websites for more information on permits:
Business Location Real Estate Resources
Useful property search resources: