Does direct mail still work for trade businesses?

Here is a number worth pausing on: the average response rate for physical direct mail in the UK is 4.4%. The average response rate for a marketing email is 0.6%. That data comes from Royal Mail's own research, and it has been consistent for several years. In a world obsessed with digital marketing, the letterbox has become dramatically less crowded — which means the postcards and door-drops that do arrive have more attention than ever.

For trade businesses, the question is not really “does direct mail work?” — the data is clear that it does. The question is whether you can target it well enough, design it effectively, and track the results back to actual booked jobs. The answer to all three is yes, and this article explains how.

Why trade businesses are ideal candidates for direct mail

Direct mail works best when three conditions are met: you are targeting a geographically defined area, the average job value is high enough to justify the cost, and your target customer owns their home. Trade businesses tick all three boxes more cleanly than almost any other category of small business.

Consider a boiler installation worth £3,000. If a postcard campaign to 2,000 households costs £600 and generates a 2% response rate — 40 enquiries — and you convert just 5 of those into boiler installs, the return is £15,000 on a £600 spend. Even a more conservative conversion rate produces a strong return because the job value is so high. This arithmetic works for boiler work, bathroom renovations, loft conversions, rewires, and any other high-value trade job. It does not work for a sandwich shop.

There is also a competitive angle. Most of your competitors are focused entirely on Google Ads and social media. The physical letterbox is significantly less contested, which means less noise and more attention for your card.

What actually works: postcard design and messaging

The design and copy on your postcard determines whether it gets read or goes straight in the recycling. A few principles make an outsized difference:

• Lead with a specific offer, not your name. “Save £150 on your annual boiler service this September” outperforms “Smith Plumbing — professional and reliable” every time. Your business name should be present but secondary to the offer.
• Use before/after photos. A dramatic bathroom transformation or a new boiler installation in a clean utility room triggers a visceral reaction in homeowners. Real photos from real jobs build trust and show competence immediately.
• Include social proof. A single line — “Rated 4.9 stars across 87 Google reviews” — does more work than several paragraphs of marketing copy.
• Make the next step obvious. One clear call to action: a phone number, a QR code, or both. Do not list your website, your email, your Instagram, and your phone number — pick one primary action and make it big.
• Seasonal messaging converts better. “Is your boiler ready for winter?” in September, “Book your summer bathroom renovation” in April. Match the emotional context of the homeowner's current season.

Targeting: getting the right postcodes

Scattergun direct mail — dropping to every household in a postcode — is wasteful. Smart targeting dramatically improves your response rate and reduces cost per lead. Three targeting strategies work particularly well for trades:

• Radius from a completed job. When you finish a job in a street, send cards to the surrounding 100–200 households immediately. Neighbours have the same aged infrastructure, and they have just seen your van outside. Recognition and trust are pre-established.
• New movers. People who have just moved into a property are statistically likely to spend on home improvements, installations, and services in the first six months. Royal Mail's Movers data lets you target this segment at postcode level.
• Affluent residential areas. Properties over a certain value tend to have higher job values, less price sensitivity, and a greater willingness to pay for quality and trust. ACORN or Mosaic data can help identify these areas precisely.

Tracking ROI: how to close the loop

The historic criticism of direct mail was that it was impossible to track. That is no longer true. Three tools give you precise attribution:

• QR codes — link to a campaign-specific landing page or your Trade2Base embed form. Every scan is a trackable event.
• Unique phone numbers — assign a different number to each campaign. Call forwarding means your team still receives calls on your main line; the tracking number just tells you the source.
• Promo codes — “Quote CARD10 for £10 off your first call-out” gives you a simple way to attribute walk-in and phone leads to specific mailings.

Trade2Base and Mailhaus close this loop automatically. When you run a Mailhaus direct mail campaign through Trade2Base, every response — whether via QR scan, unique number, or promo code — is attributed to that campaign in your CRM. You see the campaign cost, the leads generated, the quotes sent, and the jobs booked. Cost per booked job, not just cost per card sent.

Cost breakdown: how direct mail compares to Google Ads

A typical Mailhaus postcard campaign to 1,000 households costs around £300–£400 including print and postage. At a 3% response rate, that is 30 enquiries — roughly £10–£13 per enquiry. Google Ads for competitive plumbing keywords in a major UK city can cost £8–£15 per click, and not every click becomes an enquiry. The cost per actual lead from Google Ads often lands between £25 and £60 once you account for non-converting traffic.

Direct mail is not always cheaper — but it is often surprisingly competitive, and the two channels work better together than either does alone. A homeowner who received your postcard last month is far more likely to click your Google ad when they finally search. Reach and frequency across multiple channels builds the brand recognition that makes every other channel more effective.

Common mistakes to avoid

• Sending once and giving up. Most direct mail campaigns need two to three touches before they produce consistent results. Budget for a sequence, not a one-off.
• Poor quality print. A pixelated photo or a cheap flimsy card signals low-quality work. Match the quality of your marketing materials to the quality of your jobs.
• No tracking. If you cannot attribute responses to a specific campaign, you cannot improve. Always use a QR code or unique number.
• Mailing your entire service area at once. Start small — 500 to 1,000 households — test your messaging, measure response, then scale what works.

Getting started with Mailhaus

Mailhaus is Trade2Base's integrated direct mail partner. From inside your Trade2Base account, you can select a target postcode area, upload your design (or use a template), set a send date, and track every response back to a specific job. There is no minimum order and no long-term commitment. For trade businesses that have never tried direct mail, the typical first campaign breaks even within two booked jobs — and most businesses that try it once continue using it as a regular channel alongside their digital marketing.

In a world where every competitor is bidding on the same Google keywords, the businesses that grow fastest are the ones reaching homeowners through channels their competitors have given up on. The letterbox is one of them.