Google Ads for Builders: A UK Builder's Guide to PPC That Pays

Is Google Ads Right for Your Building Business?

Google Ads works exceptionally well for high-ticket building work where the customer is actively searching. Loft conversions, single and double-storey extensions, garage conversions, basement conversions, and new builds all have strong commercial intent searches with manageable competition.

Where Google Ads underperforms is general 'maintenance' building work – small repairs, minor jobs under £500, and reactive call-outs. Cost per lead on those keywords is often higher than the job value. The rule of thumb: if your average job is £3,000+, Google Ads will work. If it's under £1,000, focus on SEO and Google Business Profile instead.

How to Structure Your Builder Campaigns

The mistake most builders make is one big campaign called 'Building'. Inside it sits one ad group with 50 keywords, all sharing the same ad copy and landing page. Google's algorithm hates this – relevance scores collapse, CPCs balloon, and quality scores tank.

The correct structure is one campaign per service line, each containing tightly-themed ad groups built around a single intent. A typical UK builder running £2,000/month should run four campaigns: Loft Conversions, Extensions, New Builds and General Building. Each campaign holds 4–8 ad groups, each ad group targets a single keyword theme with 2–3 ads written specifically for that theme.

The Keywords UK Builders Should Bid On

Builder keywords cluster into three intent levels: high (ready to buy), medium (researching with intent), and low (informational). High-intent keywords cost more per click but deliver lead conversion rates above 8%. Low-intent keywords are cheap but rarely convert.

Spend 70% of your budget on high-intent terms, 25% on medium-intent, and 5% on testing. Always use exact match and phrase match for high-intent keywords. Reserve broad match modified for discovery campaigns only – broad match alone in 2026 will burn budget on irrelevant searches.

• →High intent: 'loft conversion company [town]', 'extension builders near me', 'house extension cost', 'new build contractor [town]'
• →Medium intent: 'how much is a loft conversion', 'extension architect or builder', 'rear extension builder'
• →Low intent (informational): 'what is a hip-to-gable loft conversion', 'planning permission for extensions'
• →Always negative: 'jobs', 'careers', 'training', 'apprenticeship', 'salary', 'DIY', 'free'

Negative Keywords: Where 40% of Your Budget Hides

Without a comprehensive negative keyword list, around 40% of a builder's Google Ads budget goes to searches that will never convert: people looking for jobs, students researching coursework, DIY enthusiasts, salary information, and competitor research.

Build your negative keyword list before you launch, not after. Start with our standard UK builder negative list (around 200 terms), add competitor names, exclude all 'free', 'cheap', 'DIY', 'learn', 'course', 'jobs', 'salary' modifiers, and review the search terms report weekly. Within three months you should be filtering out 50–80 new junk terms per month.

Landing Pages: Where Builders Win or Lose

Sending Google Ads traffic to your homepage is the most common and most expensive mistake builders make. Homepages are designed to give visitors lots of options. Google Ads landing pages are designed to drive a single action – a phone call or a lead form submission.

A high-converting builder landing page contains: a single H1 matching the keyword the visitor searched, a phone number above the fold with a tel: click-to-call link, three trust signals (reviews, accreditations, years trading), a 60-second video of completed work, a short form asking only for name, postcode and project type, and zero navigation menu. Removing the navigation menu alone increases conversion rates by 30–50%.

Budgets, Bidding and Realistic Numbers

Most UK builders should start with a minimum daily budget of £40–£60 across all campaigns combined. Anything less and Google's algorithm doesn't get enough conversion data to optimise effectively. Within 30 days you should be tracking enough conversions to switch from Manual CPC to Maximise Conversions or Target CPA bidding.

Realistic 2026 numbers for a UK builder targeting £20k+ extensions: cost per click £3–£8, click-through rate 5–8%, landing page conversion 6–12%, cost per lead £25–£60, lead-to-job conversion 15–30%. That works out to a cost per booked job of £100–£400 against an average job value of £18,000 – a return on ad spend (ROAS) of 45x to 180x.

Conversion Tracking: The Bit Most Builders Skip

Without proper conversion tracking, Google Ads is gambling. You don't know which keywords drive jobs, which campaigns are profitable, or which landing pages convert. The minimum tracking setup for a builder is: Google Ads conversion tracking on form submissions, Google Ads call tracking via a Google Voice forwarding number, and offline conversion uploads when leads turn into priced jobs and won projects.

Offline conversion uploads are the secret weapon. Every two weeks, export your CRM data and upload won jobs back into Google Ads. The algorithm then optimises towards the keywords and audiences that produce real revenue, not just form fills. Builders using offline conversion data typically see 40–60% improvement in ROAS within 90 days.