Implied warranties are promises or guarantees implicitly made by a seller of goods or services—even when they are not included in a contract for the goods or services. Such promises are sometimes said to be "made by operation of law."

For example, the implied warranty of habitability in residential construction focuses on the state of the completed structure. In contrast, the implied warranty of good workmanship in residential construction focuses on the builder’s conduct. These two implied warranties parallel one another, and they may overlap.

For example, a builder’s inferior workmanship could compromise the structure and cause the home to be unsafe. But a builder’s failure to perform good workmanship is actionable even when the outcome does not impair habitability. Similarly, a home could be well-constructed and yet unfit for human habitation if, for example, a builder constructed a home with good workmanship, but on a toxic waste site.

Thus, the implied warranty of habitability is more limited in scope, and protects the purchaser only from those defects that undermine the very basis of the bargain. It requires the builder to provide a house that is safe, sanitary, and otherwise fit for human habitation. In other words, this implied warranty only protects purchasers from conditions that are so defective that the property is unsuitable for its intended use as a home.

As compared to the warranty of good workmanship, the warranty of habitability represents a form of strict liability, because the adequacy of the completed structure governs liability—not the manner of performance by the builder.

The warranty of habitability generally may not be disclaimed. And the warranty of habitability extends only to latent defects—it does not include defects that are known by or expressly disclosed to the buyer—even if they are substantial.

Laws regarding the implied warranty of habitability vary from state to state and are often located in a state's statutes.

In Ohio, the implied warranty of habitability ensures that a newly constructed residential property is safe, sanitary, and fit for human habitation. This warranty is a legal doctrine that operates by law, meaning it does not need to be expressly included in a contract to be effective. It holds builders to a standard of providing a home that meets basic living conditions and is suitable for its intended use as a residence. The warranty of habitability is a form of strict liability in Ohio, focusing on the condition of the completed structure rather than the builder's construction process. It cannot generally be waived or disclaimed by the builder and applies only to latent defects, which are hidden and not known or disclosed to the buyer at the time of purchase. On the other hand, the implied warranty of good workmanship in Ohio requires builders to perform their work using the skill and quality that is customary in the industry, and it is actionable even if the defects do not affect the home's habitability. Both warranties provide protection to homebuyers, although they address different aspects of the construction process and the resulting structure.