Repair and installation of machinery and equipment (SIC division 33)
Division 33 of the UK SIC 2007 list. It holds 9 codes, listed in full below with the number of active UK companies filed under each.
What sits in division 33
This division keeps industry's equipment running. It does not make it. UK registrations spread across several large codes. Machinery repair is 33120. Electrical equipment repair is 33140. Repair of other equipment is 33190. Installing industrial machinery is 33200. Transport has its own codes, including 33160 for aircraft maintenance and 33170 for other transport equipment. The typical company is a mobile engineering firm or a small specialist workshop. A time-served engineer usually started it. They serve factories, sites and operators across one region.
Field service work runs on scheduling, quoting and job management. That makes this a good place to look for software firms selling those tools, above all where engineer headcount is growing. Parts distributors, calibration houses, tool suppliers and van leasing providers work it too. Almost every firm here runs vans. A new incorporation is usually an engineer going self-employed with one anchor customer. They need insurance, invoicing tools and a proper website within weeks. The poor-website filter flags that exact stage. Aviation maintenance firms under 33160 are a separate, more heavily regulated niche.
How to read a division 33 code
A UK SIC code is five digits and division 33 is the first two of them. Everything filed under 33 shares those digits: all 9 codes below begin 33, then the third digit narrows to a group, the fourth to a class and the fifth to the subclass a company actually picks. Division 33 sits inside section C, manufacturing, which is the broadest tier of the classification. So a code is read left to right, from an industry down to a specific activity.
More on how division 33 codes are built
Companies choose their own codes at incorporation and can change them on any confirmation statement, and Companies House does not check the answer. A company may list up to four. That is worth knowing before you treat any division total as a headcount: the numbers here are what companies said about themselves, on the August 2026 register, and the largest single code in this division is 33190, repair of other equipment.
Working division 33 as a list
Division 33 holds 9 codes and 34,759 active companies between them. No single code dominates: the largest, 33190, is only 20 per cent and the top three take 52 per cent, with the rest spread across the remaining 6 codes. Companies here describe themselves in many different ways, so the division is the sensible filter and picking one code will lose you most of the market.
More on working division 33
A caveat that matters more in some divisions than others: a company may register up to four SIC codes, and the figures below count every position, not just the first. A business filed under two codes in this division appears under both. Treat the totals as reach rather than a headcount, and if you need a clean list, filter to companies whose FIRST code sits in the division. Every company you pull carries the Companies House record, the director's name, a verified website and a verified email, and the ones we cannot complete are not charged.
Every SIC code in division 33
33110, Repair of fabricated metal products33120, Repair of machinery33130, Repair of electronic and optical equipment33140, Repair of electrical equipment33150, Repair and maintenance of ships and boats33160, Repair and maintenance of aircraft and spacecraft33170, Repair and maintenance of other transport equipment n.e.c.33190, Repair of other equipment33200, Installation of industrial machinery and equipmentProspecting this division
Division 33 companies, as leads
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Division 33 questions
What separates repair codes in division 33 from installation codes in division 43?
Division 33 is about industrial machinery and equipment. Think repairing production lines, installing factory plant and maintaining commercial kit. Division 43 is about building services: electrical wiring, plumbing and HVAC inside buildings. An engineer installing a packaging machine uses 33200. An electrician wiring the factory uses 43210. Firms doing both can list codes from both divisions, within the four-code limit.
Which code should a maintenance engineer choose when several division 33 codes could apply?
Pick the one that matches the kit you work on most. Use 33120 for mechanical machinery and 33140 for electrical equipment. Use 33190 when the mix defies a label. Getting it perfect matters less than you might think. The codes are self-declared, unchecked, and easy to amend on the confirmation statement. Choose the closest fit now and refine it as you settle into a specialism.
Find companies across division 33
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