Can I cold email a plumber in the UK?

If the business is a limited company, PECR's consent rule for marketing email does not apply, though you must identify yourself and offer an opt-out. If they are a sole trader or a partnership treated as an individual, you need their consent or the soft opt-in.

Can I cold call tradespeople?

In the UK you can make live marketing calls to business numbers not registered with the TPS or Corporate TPS, unless they have objected to your calls before. Screen against both registers, because sole traders register with the TPS.

How do I know if a trade business is a limited company?

Search its name on the Companies House register. A limited company is listed with a company number. If it is not there and trades under a person's name, it is probably a sole trader or partnership.

What do tradespeople care about most?

Usually the next few weeks of work, getting paid on time, and not losing evenings to admin. Frame what you sell in those terms.

Selling to tradespeople: channels, timing and the sole-trader rule

The buyer is on a roof

Most outbound advice assumes the buyer sits at a desk reading email. A plumber, electrician, roofer or builder is on a job from early morning, drives between sites, quotes in the evening and does the books at the weekend. They decide quickly, they hate wasted time, and they can smell a script.

Finding them is the easy part; listings by trade and town make that straightforward, and we covered how to read a listing's gaps in finding local business leads. This guide is about the harder part: reaching them in a way that is legal and gets a reply.

First: what kind of business is it?

In the UK this decides which channels you may use.

Business type	How to tell	Cold marketing email	Cold call
Limited company	On the Companies House register with a company number	Allowed without consent, but identify yourself and give an opt-out address	Allowed unless on the Corporate TPS or they have objected
Sole trader	Not on Companies House; often trades under a person's name	Needs consent or the soft opt-in	Allowed unless on the TPS or they have objected
Partnership (ordinary)	Varies	Some partnerships are treated as individuals: treat as sole trader	Screen against TPS and CTPS

The source for this is the ICO. Its guidance says you can email any corporate body (a company, Scottish partnership, limited liability partnership or government body), while sole traders and some partnerships are treated as individuals, so you can email them only if they specifically consented or bought something similar from you before and did not opt out. For calls, the ICO says to screen B2B lists against both the TPS and the Corporate TPS, because sole traders register with the first and companies with the second.

Many small trade businesses are sole traders, so in practice cold email is often not available to you for trades in the UK. Check each one. This is a summary, not legal advice; the rules elsewhere differ.

Channels, ranked for trades

Phone. Fast, direct, and how trades do business. Screen first. Keep it under a minute unless they want more.
A short letter or postcard. Old-fashioned, unusual now, read at the kitchen table. One specific observation and a phone number.
In person. At a merchant's counter, a trade show or their premises if they have one. Slow but trusted.
Email, only where allowed (limited companies) and short enough to read on a phone between jobs.
Messaging apps and social DMs. Some trades run their business on WhatsApp or Facebook. A cold message there can feel intrusive; it works best after a call or when they have publicly asked for something.

When to call

There is no official data we would quote, so this is practical reasoning: a tradesperson on a job will not answer, or will answer distracted. Calls tend to land better at the edges of the working day, before the first job or after the last, and on days when weather stops outdoor work. Leave a voicemail that says who you are and the one specific reason you called, then follow up once.

The first ten seconds

You have about one sentence before they decide whether to hang up. Lead with the specific thing you noticed about their business and a benefit in their terms.

Weak:

Hi, I'm calling from Brightsite, we're a digital agency helping local businesses grow their online presence.

Better:

Hi Dave, quick one: when I search for electricians in Harrogate your listing comes up with 4.9 stars but no website, so people can't see your work before they ring. I build sites for trades that take a day of your time. Worth two minutes now, or shall I call back tonight?

The better version is specific (the listing), checkable (he can look), framed in his terms (people seeing his work), honest about effort, and asks for a tiny commitment.

What to sell, in their words

Translate what you offer into the things trades actually count.

You say	They hear	Say instead
"Lead generation"	Jargon	"More enquiries for the jobs you want"
"CRM"	Software they don't need	"Never lose a quote in a WhatsApp thread again"
"Online presence"	Vague	"People can see your work before they ring"
"Automated invoicing"	Admin	"Get paid without chasing"
"Monthly retainer"	A cost forever	The price, and what changes in the first month

A worked week

Say you sell websites to trades in one town. Illustrative numbers:

Pull 120 listings across three trades.
Keep the 30 whose gaps match what you sell (no website, good rating).
Check Companies House: say 10 are limited companies, 20 are sole traders or partnerships.
Screen all 30 numbers against the TPS and CTPS: say 6 are registered and dropped.
Call the remaining 24 over three mornings. Email the limited companies that did not answer.

Thirty minutes of checking keeps the whole week legal and focused. The calls themselves are the work.

Where Sluice fits

Sluice searches local business listings by trade and town and judges each listing on its gaps as well as its strengths: no website, few reviews, a slipping rating. Each is scored against what you sell, so a business that cannot afford you drops down the list. It does not screen against the TPS or check Companies House status, and it has no built-in dialer, so the legal checks and calls above are still yours. See local business listings as a source, selling to local businesses and, for raw scraping at volume, Sluice vs Outscraper.

Before your first call

Look up your first ten prospects on Companies House and note which are limited companies. That single column decides which of them you can email, and it takes ten minutes.