Larsen Building Services is a commercial cleaning business servicing Maryland, Delaware and Pennsylvania including Baltimore, Harford County and Cecil County in Maryland, New Castle County, Delaware and York, Lancaster, Chester and Delaware counties in Pennsylvania Larsen Building Services has been providing Maryland, Delaware and Pennsylvania with quality commercial cleaning services for more than 20 years Over the past 20 year Larsen Building Services employees have developed a strong reputation for excellent cleaning services Our floor care professionals are on the job