Quality Office & Carpet Cleaning Services. Serving the Greater Portland area since 1990. QCS is a locally owned and operated family business, providing expert janitorial and carpet cleaning services since 1990. We strive to be the best commercial cleaning service in the Greater Portland and Southern Maine area, providing quality work at a fair price. We believe a clean office promotes a healthy and productive workplace. We offer customized cleanings catered to your specific needs, your schedule, and your budget. Leave the cleaning to us! Call for a free estimate today! "We Don't Cut Corners... We Clean Them"