Website conversion rates for B2B capital project firms: a sector benchmark
Most B2B firms in construction, engineering and energy have no idea what conversion rate their website should be hitting. This post sets sector benchmarks, explains what actually moves the needle and shows how to instrument your site from day one.
The number most firms don't know.
Ask a principal at a mid-size engineering or construction firm what their website converts at and you'll usually get a blank look. Ask what a qualified lead costs them through their site versus a referral and the answer is the same.
That's not unusual. It's a gap. And it's worth closing, because a site that costs $20,000 to build and generates two qualified enquiries a month at an average project value of $500,000 is not a marketing expense. It's a machine.
This post sets realistic benchmarks by vertical, explains what actually separates a 0.5% site from a 3% site and lays out the instrumentation you need before launch, not after.
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What 'conversion' means here.
For capital project firms, a conversion is a qualified enquiry. Not a contact form submission from a student, not a recruiter, not a competitor scraping your case studies. A decision-maker at a company that can actually buy what you sell, making a first move.
Volume is a vanity metric in this context. A firm that closes $2M projects does not need 200 leads a month. It needs eight to twelve qualified ones.
That reframe matters because it changes how you measure. You are not optimising for form fills. You are optimising for qualified form fills, calls booked and RFP invitations triggered by your site.
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Conversion rate benchmarks by vertical.
The figures below are drawn from industry research, agency benchmarks and our own client data. They reflect unique visitors to qualified enquiry, not page views.
Construction — 0.8% to 2.2%. General contractors and specialist subcontractors tend toward the lower end because traffic is broad. Firms with tight service-line pages and visible project portfolios push toward the top of the range. See how that plays out in practice at /insights/best-construction-company-websites-2026.
Architecture — 1.2% to 3.0%. Architecture firms attract more intent-rich traffic. A prospective client searching for a commercial architect in their region is already in buying mode. The ceiling is higher but so is the quality bar for visual presentation.
Engineering — 0.6% to 1.8%. Multi-discipline engineering firms often struggle with conversion because they try to speak to every buyer on every page. Firms that segment by sector or service line consistently outperform generalist sites.
Environmental engineering — 1.0% to 2.5%. Buyers in this space are often procurement teams at regulated industries. Clear credentials, accreditations and downloadable capability statements lift conversion meaningfully.
Energy and petrochemical — 0.5% to 1.5%. Long sales cycles and committee-based procurement mean the website is rarely closing the deal. Its job is to qualify the firm as credible and trigger a conversation. The benchmark looks low but the project values make even 0.8% worth engineering carefully. More context at /energy-and-petrochemical-website-design.
Shipping and maritime — 0.4% to 1.2%. Tight buyer communities, heavy reliance on existing relationships. The site functions more as a verification tool than a lead generator. Conversion matters but so does the depth of content for buyers already in conversation with you.
Transport and logistics — 0.9% to 2.4%. High variance. Freight forwarders and 3PLs serving commercial clients see stronger conversion when pricing transparency is present, even in range form.
Crane and heavy lift — 0.6% to 1.6%. A niche buyer pool. Traffic volumes are low and that's fine. One qualified enquiry from a $4M lift project justifies the site many times over.
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What actually moves the needle.
Across every sector, the same four factors separate high-converting sites from average ones.
Specificity beats breadth. A page that speaks directly to a refinery owner's procurement process converts better than a generic services page. Sector-specific landing pages are not a luxury. They are the mechanism. The case for building them at scale is laid out in /insights/nine-sector-landing-pages-2026.
Proof at the point of doubt. The moment a buyer wonders whether you've done this before, there should be an answer on screen. Project cards with real metrics, named clients where permitted and visible team credentials close the credibility gap faster than any headline copy.
Friction on the form. Counter-intuitively, adding one qualifying question to a contact form often increases qualified conversion rate while decreasing total submissions. Asking for project type, budget range or timeline filters out noise and improves the quality of what comes through.
Speed and stability. A site that loads in under 2.5 seconds on mobile consistently outperforms one that loads in 4.5 seconds, even with identical copy. This is not a developer concern. It is a revenue concern.
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Cost per qualified lead by sector.
Once you have conversion rate data and know your monthly qualified enquiry volume, cost per qualified lead is straightforward.
If your site cost $25,000 to build, hosting and maintenance runs $300 a month and you're generating six qualified enquiries a month, your first-year cost per lead is around $870. By year two it drops below $400.
For comparison, a pay-per-click campaign in engineering or construction typically runs $80 to $220 per click, with conversion to qualified lead at 5% to 12% of clicks. That puts PPC cost per qualified lead at $670 to $4,400 depending on keyword and quality of landing page.
The organic channel, once a well-built site is ranking, is not free. But it is significantly cheaper per qualified lead over a 24-month window than paid alone.
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Instrument from day one, not after.
Most firms build a site, launch it and then try to work out what's happening three months later with incomplete data. That's backward.
Before launch, set up:
- A goal in GA4 for each form submission, call booking and document download, tagged by source and landing page
- Scroll depth tracking on key service and sector pages
- A simple UTM convention so email, LinkedIn and any paid campaigns are attributable from the first click
- A baseline traffic and ranking report so you have a before number
None of this is complex. All of it is necessary. A site without measurement is a cost. A site with measurement is an asset you can improve.
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Where to go from here.
If your firm is in engineering, construction or energy and your site is not generating qualified enquiries at the lower end of the benchmarks above, the problem is almost always one of three things: wrong traffic, wrong page or wrong ask.
All three are fixable. The first step is knowing which one it is.
If you want a short external audit before committing to a rebuild, book a discovery call at /book. If you want to see how the sector pages are structured, /services has the detail.