Construction of bridges and tunnels (SIC code 42130)
Construction of bridges and tunnels is UK SIC code 42130. It sits in division 42 (Civil engineering) of the SIC 2007 list. On the August 2026 Companies House register, 502 active UK companies list 42130 among their SIC codes. 185 of them list it first.
502active UK companies list SIC 42130 among their codes on the public recordCompanies House · counts as of August 2026
SIC 42130 in numbers
502 companies is 0.01 per cent of the 5,190,464 active companies on the UK register. 42130 is the 7th most used of the 7 codes we track in division 42.
Only 185 of the 502 put it first. The other 317, 63 per cent, list it behind another code, so a search on the first code alone would miss most of them. Match any of the four positions and tighten it with a second filter.
ACTIVE COMPANIES BY REGISTERED-OFFICE POST TOWN (WHERE THE PAPERWORK SITS, NOT NECESSARILY THE WORK) · COMPANIES HOUSE PUBLIC RECORD, AUGUST 2026
London is the largest cluster at 18 per cent and the top five post towns hold 24 per cent, so the other 76 per cent sit across the rest of the country. A regional filter narrows the list without gutting it.
A worked example: 42130, registered office in London, incorporated in the last ninety days, from a pool of 502. Each lead you get arrives with a working website and a real email, and the director's name when the record has one. If we cannot complete one, you pay nothing.
SIC 42130 companies, as leads
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Civil engineering is about infrastructure, not buildings. Roads sit under 42110 and railways under 42120.
Related SIC codes
How to read SIC 42130
SIC 42130 reads as division 42 (civil engineering), group 421, class 4213, then the full five digits, inside section F, construction. A company picks its own codes, up to four, and Companies House does not check them, so 42130 is the company's own description of what it does, and 185 list it first where 502 list it anywhere.
Who sells into division 42
Plant is at the heart of selling to civils firms. Hire companies, excavator and attachment dealers, fuel suppliers and operator training providers all work this division hard.
About SIC 42130
How many UK companies use SIC code 42130?
502 active UK companies list 42130 (Construction of bridges and tunnels) among their registered SIC codes. Each company may register up to four. Of those, 185 put it first. The figures come from the August 2026 Companies House register snapshot, and count active companies only.
Is groundworks a division 42 or division 43 activity?
Both codes exist and the split is genuinely fuzzy. Site preparation and excavation is 43120. Broader civil engineering work fits 42990. Many groundworks contractors choose 42990, because their scope covers drainage, roads and structures. Others use 43120 for enabling works. Listing both is common and allowed within the four-code limit. Nothing is enforced on the choice. It is a self-declared classification.
Find UK SIC 42130 companies
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