Steam and air conditioning supply (SIC code 35300)
Steam and air conditioning supply is UK SIC code 35300. It sits in division 35 (Electricity, gas, steam and air conditioning supply) of the SIC 2007 list. On the August 2026 Companies House register, 1,813 active UK companies list 35300 among their SIC codes. 1,563 of them list it first. That makes it the third most used code in its division.
1,813active UK companies list SIC 35300 among their codes on the public recordCompanies House · counts as of August 2026
SIC 35300 in numbers
1,813 companies is 0.03 per cent of the 5,190,464 active companies on the UK register. 35300 is the third most used of the 6 codes we track in division 35.
1,563 of the 1,813 put 35300 first, and only 250 carry it as a second, third or fourth code. The code on its own is a clean 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 12 per cent and the top five post towns hold 18 per cent, so the other 82 per cent sit across the rest of the country. A regional filter narrows the list without gutting it.
A worked example: 35300, registered office in London, incorporated in the last ninety days, from a pool of 1,813. 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 35300 companies, as leads
Live rows from the enriched public record. Email addresses are withheld until you sign up. Phone numbers come with paid plans.
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On paper this is the utilities sector. On the UK register it is mostly energy project vehicles.
Related SIC codes
How to read SIC 35300
SIC 35300 reads as division 35 (electricity, gas, steam and air conditioning supply), group 353, class 3530, then the full five digits, inside section D, electricity, gas, steam and air conditioning supply. A company picks its own codes, up to four, and Companies House does not check them, so 35300 is the company's own description of what it does, and 1,563 list it first where 1,813 list it anywhere.
Who sells into division 35
So many entries are single-asset vehicles that professional services dominate the selling. Accountants and company secretarial providers run portfolios of these vehicles.
About SIC 35300
How many UK companies use SIC code 35300?
1,813 active UK companies list 35300 (Steam and air conditioning supply) among their registered SIC codes. Each company may register up to four. Of those, 1,563 put it first. The figures come from the August 2026 Companies House register snapshot, and count active companies only.
Which SIC code should a company set up to own a solar installation use?
Use 35110, production of electricity. It is the standard for generation assets of any type, including solar, wind, hydro and battery-backed generation. Companies that buy and resell power, rather than generate it, fit 35140. Developers sometimes add a construction or project development code during the build. The company chooses freely, and can revise codes on each confirmation statement as the project moves from build to operation.
Find UK SIC 35300 companies
Filter Companies House by this code. Each lead arrives with a working website and a real email, or you pay nothing. 100 free leads, no card.
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