The 3 Biggest Google Ads Mistakes South London Trades Businesses Are Making in 2026

Google Ads for trades businesses in London is one of the most competitive corners of the paid media world. A single click on 'emergency plumber Clapham' can cost £15–£25. That means a badly-run account doesn't just underperform — it hands hundreds of pounds a week to Google for nothing. Here are the three mistakes we see almost every South London trades business make in 2026, and exactly how to fix each one.

Mistake 1: Bidding on 'broad match' with no negative keywords

Broad match is Google's default, and it's a money hose. Bid on 'kitchen fitter South London' as a broad match and Google will happily show your ad for 'kitchen furniture', 'kitchen recipes', 'DIY kitchen tips' and 'kitchen fitter jobs' (people looking to be hired, not to hire). You pay for every click.

The fix: switch to phrase match or exact match on your core money keywords, and build a negative keyword list — starting with 'jobs', 'careers', 'DIY', 'training', 'salary', 'free', 'cheap' and any brand names you don't want to compete on. Review the search terms report every week for the first month and add anything irrelevant as a negative. Most accounts we audit save 20–40% of spend in the first two weeks doing just this.

Mistake 2: Sending every ad to the homepage

A homeowner searches 'bathroom renovation Streatham', clicks your ad, and lands on a homepage listing kitchens, bathrooms, extensions and loft conversions. They don't scroll. They hit back and click your competitor. Google notices the short visit and marks your landing page as low quality — which means you pay more per click for the same position. The ad wasn't the problem. The landing page was.

The fix: every ad group points to a dedicated landing page for that specific service and, ideally, that area. The headline of the page matches the headline of the ad. Photos show that specific service. Reviews mention that specific service. A visible phone number, a form and one clear call-to-action, above the fold. Do this properly and you can often halve your cost per lead without changing a single bid.

Mistake 3: Setting one daily budget and 'letting it run'

Trades enquiries follow a pattern. Homeowners search on weekday evenings, Saturday mornings, and Sunday afternoons — often on mobile from the sofa. Set one flat budget and you spread money evenly across Tuesday 3am (when no one's booking a kitchen) and Sunday 8pm (when everyone is). You're paying full price at the wrong times and getting outbid at the right ones.

The fix: run ad schedule reports after the first 30 days. Bid up 20–30% on your peak conversion windows, bid down or pause during dead hours. Split by device — mobile usually converts better for emergency trades, desktop for larger considered jobs like renovations. And separate emergency keywords ('emergency plumber near me') into their own campaign with 24/7 scheduling and a different landing page that emphasises response time.

Google Ads doesn't reward the biggest budget. It rewards the tightest account.

A 30-day rescue plan for a leaking Google Ads account

• Week 1: pull the search terms report, add 30–50 negative keywords, switch broad match to phrase or exact on core keywords.
• Week 2: build one dedicated landing page for your highest-spend service, matching the ad headline and copy.
• Week 3: turn on conversion tracking properly (calls over 60 seconds, form submissions, WhatsApp clicks). If you can't measure it, you can't fix it.
• Week 4: analyse ad schedule and device performance, apply bid adjustments, split emergency vs planned enquiries into separate campaigns.

Do these four things and most accounts we've seen go from 'we're spending money but it's not really working' to a genuine, predictable pipeline within 60–90 days. Google Ads isn't broken for trades in 2026. Most accounts just haven't been properly built.