SIC code 43999 covers other specialised construction activities n.e.c. activities in the UK, with 48,038 active companies currently registered. This represents a significant segment of UK business activity. 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 Other specialised construction activities n.e.c. industry page.
With a 85% survival rate, this sector shows strong business longevity. Only 173 of 56,267 companies registered under this code have dissolved, well below the UK average. Companies in this sector average 9.6 years old, reflecting a balanced mix of established businesses and newer market participants. Growth has been exceptional recently: 45% of all active companies were formed since 2020, marking this as one of the fastest-expanding classifications. The 2010s contributed another 36%, meaning the vast majority of businesses are relatively new. Companies are geographically dispersed across the UK, with no single location dominating. The top three locations — LONDON, GLASGOW, MANCHESTER — together account for just 14% of the sector.
SIC code 43999 stands for "Other specialised construction activities n.e.c." 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 48,038 active companies registered under SIC code 43999 in the UK, out of 56,267 total registrations. This gives a survival rate of 85%, meaning 15% of companies registered under this code have since dissolved. These figures are based on Companies House data and updated regularly.
The top locations for other specialised construction activities n.e.c. companies (SIC 43999) are: LONDON (5,493), GLASGOW (660), MANCHESTER (581), BIRMINGHAM (548), BRISTOL (528). Geographic concentration can reflect local economic conditions, industry clusters, or proximity to key markets and supply chains.
The sector is growing: 45% of currently active SIC 43999 companies were formed since 2020, and 36% during the 2010s. This sustained formation rate indicates ongoing demand for other specialised construction activities n.e.c. services in the UK.
Companies classified under SIC 43999 have an average age of 9.6 years. This suggests a balanced sector with both established players and newer entrants. Notable companies include ROGER BULLIVANT LIMITED, KELLER LIMITED, WILSON JAMES LIMITED.
Related SIC codes within the same division include: 43210 (Electrical installation), 43220 (Plumbing, heat and air-conditioning installation), 43390 (Other building completion and finishing), 43290 (Other construction installation). 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 43999 (Other specialised construction activities n.e.c.) 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 48,038 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.