UK SIC 2007 code in Section M: Professional, scientific and technical activities
71111 Architectural activities
SIC 71111 is the UK code for architectural activities. Companies House accepts it when you register a company or file a confirmation statement.
- Code
- 71111 (UK SIC 2007, Companies House list)
- Section
- Section M: Professional, scientific and technical activities
- Division
- 71 Architectural and engineering activities; technical testing and analysis
- SIC 2026
- 71.11 Architectural activities (1:2); 71.12 Engineering activities and related technical consultancy (1:2)
- Closest US NAICS
- 541310, 541320, 541330, 541340 and 3 more
Activities ONS lists under 71111
The ONS index assigns these 6 activities to this code. If one describes your company, this is the code to use.
- Advisory and pre-design architectural activities
- Architectural activities and related technical consultancy
- Architectural draughtsman
- Building design and drafting
- Construction supervision
- Making of architectural maquettes
Source: ONS UK SIC 2007 alphabetical index.
Businesses that use this code
What changes in SIC 2026
ONS published UK SIC 2026 in 2026. Its correspondence table maps this code's class (71.11) to:
| SIC 2026 code | Heading | Link type |
|---|---|---|
| 71.11 | Architectural activities | 1:2 |
| 71.12 | Engineering activities and related technical consultancy | 1:2 |
"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 71111 until it announces a switch.
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.