If you’re a specialist sub-contractor — steel fixing, groundworks, M&E, cladding, drylining, or any other trade — you know that winning work from main contractors is a different game to winning domestic jobs. The decision-maker isn’t a homeowner comparing three quotes. It’s a contracts manager, a quantity surveyor, or a procurement team evaluating your company against a set of criteria.
And increasingly, your website is part of that evaluation.
Main contractors check your digital presence. Not always as a formal step, but as a quick sense-check: does this company look professional? Do they have the experience we need? Are their accreditations current? If your website doesn’t answer those questions quickly and clearly, you’re at a disadvantage before the conversation even starts.
Here are the five things your website needs to get right.
1. A Project Portfolio That Proves Your Capability
This is the single most important element on a sub-contractor’s website. Main contractors need to see that you’ve delivered work at the scale, complexity, and standard they require. A vague statement about “extensive experience” isn’t enough.
Each project in your portfolio should include the type of work delivered, the sector (commercial, residential, infrastructure), the approximate project value or scope, the client or main contractor (where permitted), and professional photography showing the quality of your work.
If you’re a steel fixer, show the structures you’ve built. If you’re a groundworks contractor, show the foundations you’ve laid for recognisable developments. The more specific you can be, the easier it is for a contracts manager to see that you’ve done exactly what they need.
Critically, your portfolio needs to be current. If your most recent case study is two years old, it raises questions. Set up a process for adding new projects as they complete — even a basic entry with a photo and key details is better than nothing.
2. Clear, Specific Service Pages
A single page listing everything you do isn’t enough for a company evaluating your capabilities. You need dedicated pages for each core service, explaining what you deliver, how you approach it, and what types of projects you typically work on.
For example, if you’re a steel fixing contractor, you might have separate pages for reinforced concrete structures, post-tensioning, and rebar installation — each with enough detail to demonstrate genuine expertise rather than a surface-level claim.
These pages also serve a practical SEO purpose. When a main contractor searches for “steel fixing contractor London” or “groundworks sub-contractor South East”, dedicated service pages with relevant content give you the best chance of appearing in those results.
Avoid generic descriptions that could apply to any contractor. Be specific about your capabilities, your capacity, and the types of projects where you add the most value.
3. Visible, Well-Organised Accreditations
For sub-contractors, accreditations aren’t optional extras — they’re prerequisites. CSCS, CHAS, Constructionline, SSIP, and ISO certifications are often minimum requirements before a main contractor will even consider putting you on their supply chain.
Your website needs to display these prominently. Not as a cluttered strip of logos in the footer, but as a clearly organised section that communicates credibility at a glance. Group them logically: health and safety in one section, quality management in another, industry memberships in a third.
Include the registration numbers or links to verification where appropriate. And keep them current — an expired CHAS certificate on your website is worse than not displaying it at all.
If you’re working towards additional accreditations, it’s reasonable to mention that too. “Currently working towards ISO 14001 certification” shows ambition and a commitment to continuous improvement.
4. Capacity and Coverage Information
Main contractors need to know two practical things: can you handle the volume of work, and do you cover the area where the project is?
Most sub-contractor websites say nothing about either. That’s a missed opportunity.
You don’t need to publish your exact headcount or financial details, but giving an indication of your operational capacity helps. Mention the size of your workforce, the number of concurrent projects you can manage, or the types of project values you typically work at. Something like “We typically operate across 3-5 concurrent projects with a directly employed workforce of 40+” tells a contracts manager everything they need to know.
For geographical coverage, be specific. If you operate across London and the South East, say so. If you work nationally for the right projects, make that clear. Area pages for your key regions also help with local search visibility — when someone searches “steel fixing contractor Kent”, a dedicated page gives you a much better chance of appearing.
5. Professional Presentation Throughout
This might seem obvious, but it’s where many sub-contractors fall down. Your website doesn’t need to be flashy, but it does need to look professional. In construction, presentation signals competence. A well-presented website suggests a well-run operation.
That means clean, modern design that loads quickly on any device. Professional photography of your work — not blurry phone photos taken on a dark site visit. Clearly written content without spelling errors or inconsistent formatting. And a consistent brand presentation that matches your other materials.
Contracts managers and QSs will often check your website on their phone between site visits. If it’s slow, cluttered, or difficult to navigate on mobile, that’s the impression they take away.
Consider it this way: you wouldn’t turn up to a pre-qualification meeting in dirty work clothes. Your website deserves the same standard of presentation.
The Bigger Picture
None of these five elements work in isolation. A great portfolio means nothing if your website looks amateur. Impressive accreditations lose their impact if they’re hidden on a page nobody finds. The power is in the combination — a website where every element reinforces the message that you’re a capable, professional, and reliable sub-contractor.
Main contractors have more choice than ever when building their supply chains. The sub-contractors who present themselves most professionally — online and offline — are the ones who get the calls.
At Webshape Design, we build websites for construction companies and sub-contractors that are designed around how you actually win work. If your website isn’t pulling its weight, we’d be happy to take a look and discuss what a strategic rebuild could do for your business development.
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Frequently Asked Questions
Yes. While it may not always be a formal evaluation step, contracts managers and procurement teams regularly check a sub-contractor’s online presence as a quick credibility check before adding them to a supply chain or inviting them to tender.
Each project should include the type of work, the sector, approximate value or scope, the client or main contractor (where permitted), and professional photography. Enough detail for a contracts manager to confirm you’ve delivered similar work to what they need.
You don’t need to publish exact figures. Value ranges (e.g. £500k–£2m) or descriptions of project scale give procurement teams enough context to understand your capabilities without disclosing sensitive commercial information.
Very. Contracts managers, QSs, and site managers often check websites on their phones between meetings or site visits. If your site is slow or difficult to navigate on mobile, that’s the impression they’ll take forward.
