UK SIC 2007 code in Section F: Construction

43991 Scaffold erection

SIC 43991 is the UK code for scaffold erection, part of the class "other specialised construction activities nec". Companies House accepts it when you register a company or file a confirmation statement.

Code
43991 (UK SIC 2007, Companies House list)
Section
Section F: Construction
Division
43 Specialised construction activities
SIC 2026
42.99 Construction of other civil engineering projects n.e.c. (1:10); 43.22 Plumbing, heat and air-conditioning installation (1:10); 43.23 Installation of insulation (1:10); 43.35 Other building completion and finishing (1:10); 43.41 Roofing activities (1:10); 43.91 Masonry and bricklaying activities (1:10); 43.99 Other specialised construction activities n.e.c. (1:10); 43.42 Other specialised construction activities in construction of buildings (1:10); 43.50 Specialised construction activities in civil engineering (1:10); 81.22 Other building and industrial cleaning activities (1:10)
Closest US NAICS
236210, 238110, 238120, 238130 and 6 more

Activities ONS lists under 43991

The ONS index assigns these 3 activities to this code. If one describes your company, this is the code to use.

Source: ONS UK SIC 2007 alphabetical index.

What changes in SIC 2026

ONS published UK SIC 2026 in 2026. Its correspondence table maps this code's class (43.99) to:

SIC 2026 codeHeadingLink type
42.99Construction of other civil engineering projects n.e.c.1:10
43.22Plumbing, heat and air-conditioning installation1:10
43.23Installation of insulation1:10
43.35Other building completion and finishing1:10
43.41Roofing activities1:10
43.91Masonry and bricklaying activities1:10
43.99Other specialised construction activities n.e.c.1:10
43.42Other specialised construction activities in construction of buildings1:10
43.50Specialised construction activities in civil engineering1:10
81.22Other building and industrial cleaning activities1:10

"1:1" means the class carries over unchanged in scope; other link types mean it was split or merged. Companies House still uses SIC 2007, so keep filing with 43991 until it announces a switch.

Source: ONS correspondence table, SIC 2007 to SIC 2026.

Closest US NAICS codes

Matched through the shared international class (ISIC Rev. 4). Treat these as a starting point and read the definition before using one.

Similar codes to compare

Data last changed November 14, 2026. Source: Companies House condensed SIC list. How this page is built.