Steri Clean

Steri Clean is a family-owned cleaning company based in Londonderry, New Hampshire, that says it has been in business for about a decade. Its own site describes the company as a commercial and office janitorial cleaner working businesses and facilities across New Hampshire and Massachusetts, rather than a residential house-cleaning service — worth knowing if you're a homeowner looking specifically for regular home cleaning. That said, the reviews on file are consistently strong: 13 Google reviews from 2022 through 2026, nearly all five stars, repeatedly describe the crew as professional, punctual, and detail-oriented, and several reviewers name the owners directly as friendly and easy to work with. None of the reviews describe a specific residential job — the praise reads general rather than tied to a particular property or project. For a business or facility manager in the Nashua-Manchester-Concord corridor looking for a janitorial cleaning contractor, the reviews point to a well-liked, consistent operator. A homeowner should confirm directly whether residential cleaning is something they take on before booking.