If you are renting out a single unit, whether it is a detached single family home or or an individually owned townhouse style residence, you do not fall into the multi-unit dwelling category. The Truth in Renting Act applies to tenants "living in residences with more than two dwelling units (or more than three if the landlord occupies one)."
Here is the New Jersey Truth in Renting Act brochure. You'll find it on Page 1. http://www.nj.gov/dca/divisions/codes/publications/pdf_lti/t_i_r.pdf
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