Construction contracts: what Massachusetts law requires (and protects)

In Brazil, a lot of work runs on verbal agreements and relationships. In the United States, and especially in Massachusetts, a contract is not a formality: it is law, it is protection and, when it is missing, it turns into a consumer case against you. Above $1,000, residential remodeling requires a written contract. And the law says exactly what that contract must include.

Above $1,000, a written contract is not optional

The Home Improvement Contractor Law (MGL c.142A) applies to remodeling and improvements on an existing one- to four-family home that is the owner residence. Any job above $1,000 requires a written contract. It is not red tape: it is the yardstick the state uses to judge whether you acted correctly.

What the contract must include

The law lists mandatory items. Miss one, and the contract is already out of compliance:

• Name, address and HIC registration number of the contractor.
• Start and substantial completion dates of the job.
• Detailed description of the work and the materials.
• Total price and the payment schedule with dollar amounts.
• Notice that all contractors and subcontractors must be registered.
• Notice of the 3-day right to cancel.
• Disclosure of all warranties and of the owner rights.
• Notice, in bold above the signature line, not to sign with blank spaces.

HIC registration and the Guaranty Fund

Every home improvement contractor and subcontractor must register with the OCABR (registration is done through the MA Contractor Hub). That registration feeds the Guaranty Fund, a state fund that reimburses the consumer up to $25,000 for an unpaid judgment against the contractor. It is financed by a fee you pay when you register, calculated by the number of employees. Working without registration is not just illegal: it strips away protections and worsens any dispute.

What happens if you do not comply

Here is the part that catches the unwary contractor. Violating any point of 142A is automatically treated as an unfair practice under Massachusetts consumer protection law (the well-known 93A). That exposes you to double or triple damages plus the client attorney fees. Advertising a service without the registration number, abandoning the job without cause, deviating from what was agreed without written consent: each of these acts opens the door to a lawsuit that costs far more than the job.

The clauses that protect you

Beyond the mandatory, a good contract includes what prevents disputes:

• Detailed scope and, above all, what is not included.
• Written change orders, signed before executing any change in price or schedule.
• Payment schedule tied to milestones, with a clear rule for retention and release.
• Warranty with a term, scope and what voids it.
• A method for dispute resolution, including the HIC program arbitration.

The written change order, on its own, prevents most conflicts: it is what documents every "just one more thing" the client asks for in the middle of the job. Without it, you work for free or become the defendant.

A contract, in the United States, is the language of trust. A complete contract does not scare off a good client: it scares off problems. And it signals, before the job begins, that you operate as a serious business.

What changes for the Brazilian contractor

People coming from Brazil tend to treat the contract as a formality that gets in the way of trust. In the United States, it is the opposite: the contract is what builds trust. Clients, banks and insurers see a complete contract as a sign of a serious business. Its absence, or an improvised document, signals amateurism, and in the American market amateurism costs you contracts. A well-drafted contract does not scare off the good client, it scares off the problem.

There is also an important cultural point: here, what is not written down did not happen. Verbal agreements, scope adjustments in the middle of the job and promises of "we will sort it out later" have no weight in a dispute. Everything that matters must be on paper, signed. This change of habit is one of the things that most protects the Brazilian contractor who is structuring the business in the U.S.

The contract begins before the signature

A good contract is the end of a process, not the beginning. It reflects a detailed estimate, a discussed scope and a realistic schedule. If the estimate was a guess, the contract only documents the guess. That is why contract and pricing go together: the document formalizes a price that must already include direct cost, overhead and profit.

During the job, the contract stays alive through change orders. Every change in scope, schedule or price requested by the client becomes a written addendum, signed before execution. It is this habit that avoids the most common conflict scene: the client who asks for "just one more little thing" and then refuses to pay for it. Without a written change order, you work for free or become the defendant. With it, every extra is agreed, documented and paid.