Home improvement contractors are generally companies that manage and construct improvements to existing residences—whether kitchens, bathrooms, bedrooms, or complete remodels.

A contract for home improvement includes a description of the scope of the work to be performed; the materials to be used; the general contractor’s obligations to hire and manage subcontractors to construct the various components of the building; the payment terms for the construction of the building and the management of the construction; the time for completion of the work; insurance requirements; and the filing and removal of mechanic’s and materialmen’s liens (also known as construction liens or contractor liens) for labor and materials provided to improve the real estate.

In New Hampshire (NH), home improvement contractors are subject to state statutes that govern contracts, consumer protection, and construction liens. NH does not have a statewide licensing requirement for general contractors; however, they must adhere to local regulations and building codes. Contracts for home improvement should be in writing and include a detailed description of the work, materials, payment schedule, timeline, and insurance requirements. The New Hampshire Consumer Protection Act (RSA 358-A) requires that contracts for home improvement be clear, fair, and disclose all material terms. Regarding mechanic's liens, under NH RSA 447, contractors, subcontractors, and suppliers have the right to file a lien for unpaid labor and materials provided. The lien must be filed within 120 days after the last delivery of labor or materials for contractors and within 90 days for subcontractors and suppliers. To enforce the lien, a lawsuit must be initiated within one year from the last date of services rendered or materials provided. It is advisable for homeowners to request lien waivers from contractors as work progresses and upon final payment to avoid potential liens on their property.