"How much should we spend on Google Ads?" is the question we get asked most by construction businesses, and the answer most agencies give ("it depends on your goals") is technically true and completely useless. You can work out a sensible Google Ads budget for a construction business from four numbers: what a click costs in your market, how many clicks it takes to get a lead, how many leads it takes to win a job, and what a job is worth.
This article gives you those numbers for the Australian construction market in 2026, sets out realistic Google Ads budgets by business size and goal, and explains why spending too little is often worse than spending nothing.
In this article
What Google Ads cost in Australia: the basics
Google Ads cost you two things: the media spend (what you pay Google for clicks) and the management cost (what you pay an agency or the time you spend yourself). Most confusion about "Google Ads cost Australia" comes from mixing the two up. This article covers both, but separately.
Media spend is driven by cost per click, which is set by auction. The more businesses bidding on a search term in a location, the higher the click cost. Construction terms in Sydney and Melbourne are among the more expensive in the country because there are a lot of contractors and a lot of agencies bidding on their behalf.
Cost per click ranges for construction terms
These are realistic ranges we see across Australian metro markets in 2026. Regional markets typically sit at the lower end.
| Search term type |
Typical cost per click |
Notes |
| Emergency trades (plumber, electrician, locksmith) |
$15 to $45 |
Highest competition; converts fast |
| General trades (concreter, landscaper, painter) |
$6 to $20 |
Suburb targeting lowers cost significantly |
| Renovation and extension builders |
$10 to $35 |
Inner suburbs of Sydney and Melbourne at the top of the range |
| New home builders |
$8 to $30 |
Volume builders push growth corridor costs up |
| Commercial construction and fitout |
$12 to $40 |
Low volume, so budgets rarely exhaust |
| Civil, earthworks, plant hire |
$5 to $25 |
Often too little search volume to justify |
A click is not a lead. Across construction campaigns, somewhere between 5% and 15% of clicks become a call or form submission, depending heavily on landing page quality and how tightly the campaign is targeted. That means a lead typically costs 7 to 20 clicks.
Working backwards from the job you want
The right budget isn't a number you pick. It's a number you calculate from what you're trying to achieve. Take a renovation builder in Brisbane who wants two additional jobs a month from Google Ads:
- Jobs wanted: 2 a month.
- Lead to job conversion: roughly 1 in 5, so 10 leads needed.
- Click to lead conversion: roughly 1 in 10, so 100 clicks needed.
- Cost per click in Brisbane for renovation terms: around $15.
- Media budget: 100 clicks at $15 is $1,500 a month.
Add a management fee and the total is around $2,500 to $3,000 a month to win two renovation jobs worth perhaps $150,000 each. The same calculation for a Sydney builder with $30 clicks doubles the media spend. For a plumber wanting 40 jobs a month at $25 a click and a 1 in 2 conversion rate, the numbers work out very differently. Run your own figures before you set a budget.
Budget guide by business size and goal
With the caveat that your own calculation beats any rule of thumb, these are realistic monthly media budgets (excluding management) for construction businesses in 2026:
- Sole trader or small trade business testing the channel: $800 to $1,500. Enough to gather data on one or two services in a tight suburb radius. Below this, campaigns struggle to gather enough data to optimise.
- Established trade business (3 to 10 staff) wanting steady enquiry: $1,500 to $4,000. Covers several services across a metro region with room for seasonal increases.
- Residential builder or renovator: $2,000 to $6,000. Higher click costs and longer sales cycles mean more spend per won job, offset by job value.
- Commercial contractor or multi-service construction business: $3,000 to $10,000. Multiple campaigns across services and regions; often paired with SEO to reduce dependency.
- Civil, engineering and mining services: often $0 to $1,500. Search volumes are usually too low for ads to be the primary channel; capability content and SEO do more. See our guide on whether to start with SEO or Google Ads.
The variable that moves these figures most is location. A Brisbane or Adelaide business can achieve at the bottom of each range what a Sydney business needs the top of the range for.
Why a too-small budget wastes money
This is counterintuitive but important. A $300 a month Google Ads budget for a builder in Melbourne is usually worse than nothing. At $25 a click that buys twelve clicks, which is roughly one lead, which is not enough data to learn anything or optimise anything. The campaign runs for six months, produces two enquiries, and the business concludes Google Ads don't work.
Google's systems need conversion data to optimise, and that takes volume. A campaign that generates 15 to 30 conversions a month learns quickly and gets cheaper. One that generates 2 doesn't. If the honest calculation says you need $1,500 a month to get meaningful results and you can only fund $500, the better move is to put the $500 into your Google Business Profile, reviews and website until you can fund the channel properly.
Management fees and what they should cover
Google Ads management in Australia is typically priced one of three ways: a flat monthly fee (commonly $500 to $2,500 for construction businesses depending on account complexity), a percentage of spend (usually 10% to 20%), or a hybrid with a minimum. Flat fees suit smaller budgets; percentage models make more sense above $10,000 a month in spend.
Whatever the model, the fee should cover: campaign structure by service and suburb, keyword and negative keyword management, ad copy testing, landing page recommendations, conversion tracking including phone calls, monthly reporting tied to leads and cost per lead, and regular optimisation. If a management fee doesn't include call tracking, you can't measure the channel properly, and for construction businesses most leads are calls.
Our earlier articles on what Google Ads cost a construction business and setting a Google Ads budget for a construction company cover the fee structures in more detail.
Adjusting the budget over time
A Google Ads budget shouldn't be fixed for twelve months. The businesses that get the most from the channel treat it as a tap:
- Increase when cost per lead is below your lead value and you have capacity to take on the work.
- Decrease when the calendar is full rather than paying for enquiry you'll turn away.
- Shift seasonally. Roofing and plumbing budgets up before Queensland's storm season; landscaping up in autumn and spring; renovation down over Christmas.
- Redirect as SEO matures. When a service page starts ranking organically, reduce paid spend on that term and move it to a service or suburb where organic hasn't caught up.
Review the numbers monthly using cost per lead and cost per won job, not clicks or impressions. Our construction lead cost benchmarks give you comparison figures by trade, and our lead generation service covers how we set budgets against lead value for each client.
Constructiv Digital manages Google Ads for construction, civil and trade businesses across Australia, with call tracking and reporting built around cost per won job. If you'd like help working out the right budget for your business, get in touch with our team.
