Commercial & Janitorial

Commercial & Janitorial Cleaning in Central NH

Dependable janitorial service for offices, medical and dental practices, retail, municipal buildings, schools, camps, and churches across the Lakes Region and Plymouth — on a schedule that fits around your operation.

Get a Free Estimate Call (603) 527-2610

Free estimates  ·  Same-business-day response  ·  Mon–Sat 6 AM–8 PM

gilford cinema - commerical cleaning
Family-Owned Since 1981Background-Checked StaffFully InsuredGreen Cleaning Products24-Hour Re-Clean Guarantee
For Central NH Businesses

What kinds of businesses do you clean?

For more than 45 years, Great Northern Cleaning has kept Central New Hampshire workplaces clean, healthy, and presentable — from offices and medical practices to prep schools, colleges, summer camps, and churches. With a trained team of 56, we staff anything from a single storefront to a multi-building campus, tailoring a recurring plan to your space, your hours, and your budget.

Every cleaner is trained, uniformed, and background-checked, and every contract is backed by our 24-hour re-clean guarantee.

Commercial services we provide

  • Office and workplace cleaning
  • Medical and dental facility cleaning
  • Prep schools, colleges, and campuses
  • Summer camps, churches, and religious institutions
  • Retail and showroom floors
  • Municipal and government buildings
  • Restroom sanitation and restocking
  • Hard-floor care, carpets, and windows
Medical & Dental

Cleaning built for healthcare spaces

High-touch disinfection

Doorknobs, counters, switches, and shared surfaces disinfected on every visit to help limit the spread of germs.

Waiting & exam rooms

Reception areas, waiting rooms, and exam rooms cleaned to give patients a spotless first impression.

Around your hours

Early-morning, evening, or weekend service so the office is ready before the first patient arrives.

  • We’ve been using Great Northern Cleaning at The Insurance Outlet for many years now. They’re incredibly reliable, affordably priced and genuinely nice people. We receive bi-weekly cleaning from them and annual carpet cleanings at the office and my home. They take great pride in their work and are extremely responsive. Would recommend to anyone!
    Chris McCarthy
    Commercial client – Google review
Common Questions

Commercial Cleaning Questions, Answered

Yes. We clean medical and dental practices with extra attention to high-touch surfaces, waiting rooms, exam rooms, and restrooms, using appropriate disinfection throughout.

Yes. We clean prep schools, colleges, summer camps, churches, and other religious institutions across the Lakes Region, on schedules that work around classes, services, and camp seasons.

Absolutely. Our crews can start as early as 6 AM and work evenings or weekends so cleaning never interrupts your business.

Yes. Most commercial clients are on a recurring schedule — daily, several times a week, weekly, or monthly — with a fixed scope agreed up front. One-time and event cleans are available too.

Yes. Great Northern Cleaning is licensed, bonded, and fully insured, and every employee passes a background security check before entering your facility.

From our Plymouth office we serve businesses across Belknap County, the Lake Winnipesaukee towns, and the Plymouth and Lincoln-Woodstock areas.

Central NH Business

Part of the Lakes Region business community

From downtown Laconia storefronts to Plymouth offices and the practices in between, we clean for the businesses that keep Central New Hampshire running. As a Lakes Region company ourselves, we know how much a clean, welcoming space matters to your customers and your team.

Whether you belong to the Lakes Region Chamber or run a small shop on Main Street, we’ll build a plan that keeps your space looking its best.

See the areas we serve →

Get Your Free Cleaning Estimate

Tell us about your property and we will follow up the same business day. No obligation — estimates have been free here since 1981.

Request an Estimate Call (603) 527-2610