SIC code 41100 (Development of building projects) is one of the most widely used business classifications in the United Kingdom, with 109,610 active companies registered under this code. This makes it one of the largest individual SIC categories in the UK economy. It falls under Section F (Construction) of the UK SIC 2007 classification system, which is used by Companies House to categorise all registered businesses.
See the full industry analysis on the Development of building projects industry page.
With a 88% survival rate, this sector shows strong business longevity. Only 298 of 123,928 companies registered under this code have dissolved, well below the UK average. Companies in this sector average 10.0 years old, reflecting a balanced mix of established businesses and newer market participants. Growth has been exceptional recently: 49% of all active companies were formed since 2020, marking this as one of the fastest-expanding classifications. The 2010s contributed another 32%, meaning the vast majority of businesses are relatively new. The leading locations for this sector are LONDON (20,318), MANCHESTER (1,758), BIRMINGHAM (1,373), which together account for 21% of active companies.
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. The code is required for annual confirmation statements and is used by HMRC, ONS, and other government bodies for statistical and regulatory purposes.
There are currently 109,610 active companies registered under SIC code 41100 in the UK, out of 123,928 total registrations. This gives a survival rate of 88%, meaning 12% of companies registered under this code have since dissolved. These figures are based on Companies House data and updated regularly.
The top locations for development of building projects companies (SIC 41100) are: LONDON (20,318), MANCHESTER (1,758), BIRMINGHAM (1,373), BRISTOL (1,242), GLASGOW (1,019). Geographic concentration can reflect local economic conditions, industry clusters, or proximity to key markets and supply chains.
The sector is growing: 49% of currently active SIC 41100 companies were formed since 2020, and 32% during the 2010s. This sustained formation rate indicates ongoing demand for development of building projects services in the UK.
Companies classified under SIC 41100 have an average age of 10.0 years. This suggests a balanced sector with both established players and newer entrants. Notable companies include NETWORK RAIL INFRASTRUCTURE LIMITED, STEPNELL LIMITED, MACE LIMITED.
Related SIC codes within the same division include: 41202 (Construction of domestic buildings), 41201 (Construction of commercial buildings), 4100 (Collection, purification and distribution of water). Companies may use multiple SIC codes if they operate across several of these related activities. When registering with Companies House, businesses should select the code that best represents their primary activity.
You can search for companies with SIC code 41100 (Development of building projects) using UVAGATRON's company explorer, which allows filtering by SIC code, location, and company status. Alternatively, Companies House offers a basic search on their website. Our platform adds risk intelligence, director networks, and signals from 50+ government databases to each company record.
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: 2026-04-17.