SIC code 81221 covers window cleaning services activities in the UK, with 2,781 active companies currently registered. It falls under Section N (Administrative and support service activities) of the UK SIC 2007 classification system. The average company age is 6.3 years.
SIC code 81221 stands for "Window cleaning services" under the UK Standard Industrial Classification (SIC 2007) system. It belongs to Section N — Administrative and support service activities. Companies use this code when registering with Companies House to indicate their primary business activity.
There are currently 2,781 active companies registered under SIC code 81221 in the UK, out of 3,123 total registrations (including dissolved companies).
Search, filter, and analyse 2,781 companies classified under this SIC code with AI-powered risk intelligence.
Data sourced from Companies House, HM Land Registry, FCA Register, and 50+ government databases. SIC classification follows the UK Standard Industrial Classification of Economic Activities 2007 (SIC 2007). Last updated: 2026-04-05.