SIC code 41100 (Development of building projects) is one of the most widely used business classifications in the UK, with 109,610 active companies registered under this code. It falls under Section F (Construction) of the UK SIC 2007 classification system. The average company age is 9.9 years. The leading locations are BRISTOL (1,242) and LEEDS (1,014).
See the full industry analysis on the Development of building projects industry page.
SIC code 41100 stands for "Development of building projects" under the UK Standard Industrial Classification (SIC 2007) system. It belongs to Section F — Construction. Companies use this code when registering with Companies House to indicate their primary business activity.
There are currently 109,610 active companies registered under SIC code 41100 in the UK, out of 123,928 total registrations (including dissolved companies).
The top locations for companies classified under SIC 41100 are: BRISTOL (1,242), LEEDS (1,014), LIVERPOOL (1,012). These areas represent the highest concentration of development of building projects businesses in the UK.
Search, filter, and analyse 109,610 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.