In-House: Spelling and Hyphenation
Merriam-Webster gives “in-house” as the headword for both adjective and adverb uses referring to work done within an organization rather than by outsiders. For that established expression, the hyphenated form is the dependable dictionary spelling.
Use “in-house” for the established adjective or adverb meaning within an organization, as in “in-house counsel” or “developed in-house.”
Key details
Further guidance
Adjective Use
Use the hyphen in attributive uses such as “in-house team,” “in-house counsel,” and “in-house training.”
Adverb Use
The dictionary also records the hyphenated form when it functions adverbially, as in work handled in-house.
Boundary
This guide is about the established lexical expression “in-house,” not every sentence in which the separate preposition “in” happens to precede the noun “house.”
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- In-house — Definition & Meaning (opens in a new tab)Merriam-Webster · Dictionary headword and adjective/adverb treatment of “in-house”