SIC 41 · 42 · 43
Housebuilders and general builders, civil engineering contractors, electricians, plumbers and heating engineers, roofers, joiners, plasterers, painters and decorators: for builders’ merchants, manufacturers, plant hire firms and software vendors who want to reach the firms of one trade in a region by post or plan a sales territory.
Our UK dataset holds 2,676,396 records (as at 4 November 2026); they are not yet assigned to industries. The quote states the size available for this industry.
Export of the whole industry: £379 (full price). Selections by nation, postcode area or your own filters are quoted on request.
Official statistics: 392,850 businesses in the UK according to ONS, UK business: activity, size and location 2026 (enterprises in March 2026, published 24 September 2026). Section F construction: divisions 41 construction of buildings (123,630), 42 civil engineering (22,840) and 43 specialised construction activities (246,380). This is the size of the market, not the size of our dataset.
First define the trade and the delivery area, for example plumbing and heating firms in Scotland or in a handful of postcode areas. Making the website a required field lets you check each firm’s services afterwards.
The industry figure covers very different construction and finishing firms. It is neither a count of one trade nor proof that a firm is Gas Safe registered or belongs to a competent person scheme.
Price of the whole industry: £379. A selection by region, sub-industry or required fields is quoted individually; the whole-industry price is not a price promise for the filtered selection.
View the fictitious CSV sample file · Check columns and format · Database status
Select this industry in the configurator
A request is not an order. Scope, fields, the date of the data and price are confirmed before you order.
The industry is section F of UK SIC 2007: construction of buildings (41), civil engineering (42) and specialised construction activities (43), which is where most trades sit. The classification files a firm under its main activity; whether it may do gas work or self-certify electrical work is a separate question, answered by registration schemes, not by the code.
Builders’ merchants are wholesalers (46.73) and belong to Wholesale and trade agents; garages are under Motor trade and garages. Architects and engineering consultancies have an industry of their own.
| UK SIC 2007 | Official title | For your selection |
|---|---|---|
| 41.10 | Development of building projects | property developers; can be excluded |
| 41.20 | Construction of residential and non-residential buildings | 41.20/1 commercial buildings, 41.20/2 domestic buildings |
| 42 | Civil engineering | roads and railways, utility projects, water projects |
| 43.21 | Electrical installation | electricians; installation of solar panels is also coded here |
| 43.22 | Plumbing, heat and air-conditioning installation | plumbers, heating and gas engineers |
| 43.3 | Building completion and finishing | plastering, joinery installation, floor and wall covering, painting and glazing |
| 43.91 | Roofing activities | roofers; scaffold erection is 43.99/1 |
For some trades, registration decides what work a firm may do. The registers are public, but they are search tools for householders, not directories for marketing.
These 15 columns are included.
A firm has one main activity in the statistics. A plumber who also fits bathrooms and solar panels sits under 43.22, not additionally under electrical installation. A selection by trade gives you the firms with that focus, not every firm that offers the service.
The region follows the business address and its postcode. A roofer with a Chester address often works across the border in north-east Wales but counts as North West England. For field sales territories near a border, include the neighbouring postcode areas.
If a firm is a sole trader, its details are personal data: for a letter, the Art. 14 UK GDPR information and the right to object apply, and emails need consent or a soft opt-in (PECR reg. 22(3)). Before ringing any firm, screen the number against TPS and Corporate TPS (reg. 21).
Example request: we sell heat pumps through the trade and are looking for firms with main activity 43.22 in the North West and Yorkshire and The Humber that publish a website, for a postal mailing with a training invitation. Please leave out developers (41.10). How many records is that, and how current are the data?
Use cases
Field sales planning: firms of one trade per postcode area, sorted by postcode.
Invitations to product training and demo days by letter to one trade.
Gauge the size of a trade per region before staffing a territory.
Overview of contractors and finishers within reach of a depot.
Questions
The industry column covers construction as a whole; where a record carries a UK SIC code, the selection can be narrowed to 43.21 or 43.22, by nation or postcode area. If the code is missing or unclear for part of the trade, we tell you before quoting, not afterwards.
It is a search for householders: find a registered engineer by postcode or check an engineer’s registration. It is not a marketing list, and we do not copy it. Registration status is not a column in our export.
Calls are allowed only to numbers not registered with TPS or Corporate TPS and only if the firm has not objected, so screen before you dial. Emails to a limited company need no prior consent but must identify you and offer an opt-out; to a sole trader or a partnership in England, Wales or Northern Ireland they need consent or a soft opt-in. Details: PECR rules for B2B email and calls.
392,850 businesses in the UK according to ONS, UK business: activity, size and location 2026 (enterprises in March 2026, published 24 September 2026). Section F construction: divisions 41 construction of buildings (123,630), 42 civil engineering (22,840) and 43 specialised construction activities (246,380). This is a figure from official statistics, not the size of our dataset.
Format, sources, price and marketing law (PECR, TPS screening): questions about all industries.
