Ask any UK builder where they get their customers and you'll hear the same three answers: word of mouth, paid directories, and maybe some Facebook ads. Almost nobody mentions the one source that lets you reach a homeowner the day after their planning permission is approved — before any of your competitors have seen it.
There are roughly 400,000 householder planning applications submitted in England every year, plus another 100,000-odd across Wales, Scotland, and Northern Ireland. Around 88% of householder applications get approved. Every one of those approvals is a real homeowner about to spend £30,000 to £400,000 on building work. The question is how you find them before everyone else does.
The five ways UK builders actually get leads
In practice, you're choosing between variations of the same five sources. Most builders use one or two. The ones winning bigger jobs in 2026 stack three or four.
1. Word of mouth and referrals
Still the strongest channel for high-value work, and it always will be. Homeowners spending £200k+ on a renovation want someone a friend has used.
The problem: it's not a channel you can scale. You can't ask 10 happy customers to find you 10 new ones on schedule. You get what comes.
Worth doing: systematic follow-up after every job. A one-page leave-behind with your best photos and a request for a review. But don't confuse "doing good work" with "having a reliable lead source."
2. Paid directories — Checkatrade, MyBuilder, Rated People
The industry's dirty secret: most builders on Checkatrade will quietly tell you it stopped working around 2019. You're paying £40-80 per month to appear next to five other builders the homeowner also contacted. The leads aren't exclusive, and the homeowner is already comparison-shopping before the first phone call.
MyBuilder and Rated People work on a pay-per-lead model instead of subscription. Better in theory — you only pay for leads you want. Worse in practice because the same homeowner gets sent to four builders simultaneously, and you're all racing to call first.
Verdict: fine as a baseline, terrible as your main strategy. If a lead source is open to every builder in your area, your margins get squeezed every quote.
3. Council planning portals — free but painful
Every UK council publishes planning applications on a public portal. They're legally required to. The data is there: addresses, project details, decision dates, approval status.
The problem is there are 400+ councils, each with its own portal, each with its own data format, most with terrible search functions. Trying to monitor "extensions approved in Kent this week" manually means checking 13 different council websites every morning. Nobody does it, which is exactly why it's an underused channel.
If you're disciplined and only care about 1-2 specific councils, it's worth learning your local portal. Set up a weekly routine. Download the approvals. Send letters. Most builders won't do it, so the ones who do win.
4. Google and Facebook ads
Works for some trades (emergency plumbing, roofing repairs), doesn't work for most high-value building work. When a homeowner is spending £150k on an extension, they're not clicking a Google ad — they're asking a neighbour who did theirs.
Facebook ads can generate inquiries but they're low-intent. You'll spend £500 to speak to 20 people, of which 1 is real. Works if you optimise relentlessly. Most builders don't have the time.
5. Direct mail to planning approvals
This is the method most builders overlook, and it's the single highest-intent channel that exists. Here's the logic:
- A homeowner has just received planning approval
- They have to hire a builder to do the work
- They probably haven't hired one yet (approval comes before contractor selection)
- They've spent months thinking about this project
- They live at a known address
A personalised letter posted the day after approval lands at exactly the moment they're most ready to act, with zero competitors in their inbox.
The catch: you need to know which applications just got approved, across every council you care about, before your competitors. Which brings us to the practical question.
How to actually do direct mail to planning approvals
Three options. Each trades effort for coverage.
Option A: manual monitoring. Check your local council portal every weekday. Download the approvals. Look up each homeowner's name and address. Print personalised letters. Post them. Covers one council. Takes an hour a day. Costs the price of stamps and paper.
Option B: data brokers. Some companies sell planning application data as Excel files. Better than nothing, but the data is usually a week old by the time you get it, and every builder subscribed to the same service is writing to the same homeowners. Costs £100-400 per month per area.
Option C: automated, exclusive, same-day. Scraping tools that monitor every council portal daily, flag the approvals in your area, and either hand you a spreadsheet or send the letters for you. The advantage is speed: your letter arrives days before any subscriber to a data broker.
We built PlanPost because we thought Option C should exist and it didn't. Every morning our system finds the planning approvals in your selected areas, writes personalised letters using the actual project details from the application, and posts them via first-class mail. Your name is the only one in that homeowner's letterbox for a week.
If you want to see it, there's a free trial at planpost.uk/join — no card required, and you can see the actual leads in your area before you pay f