Top 100 UK Construction SEO Audit: Surprising Mistakes and Data [2025]

It all started when I was doing some competitor research for a construction client. I wanted to understand how other companies in the industry were using SEO – what was working and what wasn’t. But the more I looked the more I realised something was missing: there wasn’t any in-depth and up-to-date overview of how the construction SEO landscape performs online in the UK.

No benchmarks. No industry-wide insights. No actionable data.

This report is designed to fill that gap — a comprehensive snapshot of construction SEO in 2025.

I set out to analyse the top 100 UK construction companies by revenue, diving deep into how they perform across four main areas within SEO:

• Technical SEO
• Backlink Authority
• Content and Blogging Strategy
• Mobile Performance

The key was to perform all the research by using 100% FREE methods to show that you don’t need to have a budget to improve your website’s traffic and improve your site’s Google Rankings.

My Construction SEO methodolgy

The first challenge was to choose the 100 websites that I should analyse and audit. After a lot of back and forth I decided to focus on the top 100 UK construction companies by revenue using data from The Construction Index. 

My methodology wasn’t as straight forward as it first seemed. I first looked to what tools were out there, but they only painted part of the picture. I soon realised that I would have to perform some manual research to fully understand how construction SEO performance compared across the top companies.

Here is how I approached the research:

Technical SEO

For the Technical SEO, I used Screaming Frog as they have a FREE desktop app that allows bulk analysis. I crawled each homepage and identified issues relating to:

• Indexability (robots.txt, no index tags, etc)
• Missing or poor structured <meta> descriptions
• Missing <h1> tags
• Schema markup presence via JSON-LD extraction.

Backlink Authority

Using Ahrefs and Moz, I managed to pull:

• Domain Rating (DR)
• Total number of backlinks and referring domains
• Do-follow / no follow ratios
• Spam score indicators

 Content & Blog analysis

This was the most manual aspect of the research as there was no FREE way of getting this data via tools. I had to manually inspect each website and assess:

• Whether a blog or news section was present
• Publishing frequency
• Use of author bios (to support E-E-A-T)
• Whether a publishing date was present
• Whether content appeared SEO-driven or PR-focused

Page Speed & UX Performance

Using Google PageSpeed Insights (mobile search) I evaluated:

• Overall performance score
• Largest Contentful Paint (LCP)
• First Contentful Paint (FCP)
• Cumulative Layout Shift (CLS)
• Total Blocking Time (TBT)
• Page weight (in MB)

This research gave me a comprehensive view of how the top 100 construction companies where performing.

Technical SEO: The construction industry is missing its foundation

Before you focus on content strategies, build backlinks, or rank for keywords, you need to make sure that your website is technically sound. That means being indexable, readable by search engines, and structured with the right on-page elements.

The construction industry doesn’t seem to have this foundation. When I audited the homepages of the 100 UK’s largest construction companies using Screaming Frog, I found a wide range of issues with the basic technical SEO setup.

Technical SEO: Key findings

It’s important to note that I only analysed the homepages, so there are bound to be more issues than this throughout the websites.

Missing <h1> tags (36%)

In my experience it isn’t uncommon to find websites with missing <h1> tags, but I was surprised to find 36% of the homepages missing them. The <h1> tag is vital to a page’s hierarchy as it not only tells Google what the page is about, but it can also confuse search engines and dilute relevance.

This often occurs when web designers / web developers favour stylised hero text but forget to wrap them in proper semantic tags. Not only is this a major SEO oversight, but it also is an extremely quick fix that shows lack of SEO understanding.

How to fix missing <h1> tags

Once you have identified the missing <h1> tag on your page you just need to add it to the HTML of your website. Just make sure you are only adding one <h1> tag per page, as adding multiple can confuse Google.

Missing meta descriptions (24%)

It important to note that meta descriptions don’t directly affect rankings, but they can heavily influence click-through-rates (CTR) which will have a huge effect in the long run.

With nearly 1 in 4 construction websites missing their meta descriptions on their homepage, Google either shows a random snippet or nothing at all, creating a missed opportunity to control the company’s messaging.

This again is an incredibly easy fix and something that any company can add for FREE. Once you have your meta description written (including the target keyword) simply add it to the head of your HTML code or use a plugin such as Yoast SEO to enter the information.

Non-indexable Homepages (10%)

Having a non-indexable page of any kind essentially tells Google to not look at this page and to not include it in search results. As you might imagine, that’s not great for your website’s traffic. The most shocking find was that out of the 100 websites I audited, 10% had a non-indexable homepage.

What causes no-indexable pages;
Most non-indexable pages are often caused by:

1. txt disallow rules
2. Meta no-index tags
3. Incorrect canonical settings.

How to fix them Non-indexable Homepages?

This issue often requires hiring a web developer or a Technical SEO expert who can look at what’s causing the issue and quickly fix it – if you are using a WordPress plugin, go into the advanced settings and check that you haven’t ticked the non-indexable option by mistake.

Lack of schema markup (11%)

We also analysed the schema markup across the 100 construction websites and found that 11% didn’t’ have any at all. The ones that did weren’t using it to its full potential. Schema structured data can be a very powerful SEO tool, enhancing a website’s SEO. Some areas to look at are:

• Star Ratings
• FAQs
• Breadcrumbs
• Knowledge Panels

How to fix lack of Schema markup

If you’re using WordPress, you can install plugins like Yoast SEO or Math Rank. Math Rank is especially good and has a FREE version that is very powerful. Simply follow the setup and it takes care of most of your Structured Data for you.

Technical SEO – Takeaway

Despite being the biggest players in the industry, many construction companies in the UK are missing basic technical SEO foundations. A lot of the areas which we have covered aren’t necessarily “advanced” and they shouldn’t be happening at this level.

Simply put, fixing these errors won’t just improve rankings, but it will also help search engines understand and trust their websites all of which affect visibility and traffic.

Backlink Authority: Strong domains but weak strategy

One area that the construction industry shows its strength is in domain authority. Most of the top 100 companies have been online for years and have organically gained a lot of backlinks via appearing in directories, government tenders and industry publications.

But when you dig a little deeper, the numbers reveal an interesting story. Even though most companies have a high Domain Rating (DR), their backlink profiles often lack quality, consistency and intent.

Backlink Authority: Key findings

Strong Domain Ratings (DR)

• The average DR was 44.15, and 81% of companies scored 30+, showing a strong domain trust and link equity.
• This makes sense as these companies often rank well for branded keywords, appear in procurement databases, and have naturally acquired links over time.

But it’s not that simple. Even though domain authority is a good benchmark for how established a website is, it’s a byproduct of reputation rather than a strategy. And reputation alone isn’t enough for search growth.

Weak Link Quality

Weak link quality is measured by the ration between do-follow links and no-follow links. A do-follow link is a normal link that passes authority between one website and another, whereas a no-follow link contains the rel=”nofollow” attribute which tells search engines to not pass the authority.

With that said, nearly 30% of businesses had a do-follow ratio below 80%, meaning a large portion of their backlinks don’t really pass on much SEO value. The 20% of no-follow links probably come from social media links, no-follow websites or directories or low-quality press mentions. This is fine for brand awareness, but not great for rankings.

How to fix weak link quality

There are two ways in which you can increase the do-follow ratio:

1. Analyse all your no-follow links and look for opportunities. Contact authors and creators who are linking to your site and ask them to change the link to a do-follow.
2. The most effective option is to increase the number of do-follow links to your site. This will increase the ratio and increase your website’s authority and credibility.

Low link diversity and lack of linkable content

As part of my manual research looking through blogs and websites (next section) I noticed that very few companies produce thought leadership content, industry research, or link-worthy content assets (such as calculators, benchmarks, or whitepapers).

The backlink profiles are mainly passive, not earned through outreach or high-quality content. So, construction companies aren’t earning links to product/service pages or bottom of the funnel content, they’re just picking up unstructured, low value links over time.

Domain Authority Takeaway

Overall, the construction industry has a high domain authority, but a lot of companies have low intentionality behind their link building strategy.

To improve this strategy:

• Build content designed to attract links (e.g. data, trends, frameworks)
• Launch targeted digital PR campaigns
• Improve link ratios

Blog and Content Strategy Analysis

Having a content strategy for your website is one of the most powerful tools in SEO. Especially in 2025, understanding user intent, crafting original content based on real-life research can:

• Capture long-tail, high intent keywords
• Build topic authority
• Showcase thought leadership
• Attract backlinks and organic traffic over time

But what we found through our research is that the UK construction industry is really ignoring such a big opportunity. Blogs are being underutilised, under-optimised, and often only used for the sake of appearances.

Blog and Content: Key findings

The good news: Nearly all the companies have a blog section

• 96% of companies have some kind of blog / news section
• 85% of companies publish at least once a month

This shows that companies want to post and have the resources to create content, but the execution or interest falls short.

The bad news: They’re not SEO blogs

Whilst having a blog section on their website is a great start, nearly all 100 construction companies fall into one of two categories:

1. PR updates (e.g. “Company X wins contract in Sheffield”)
2. Internal milestones (e.g. “We welcomed 3 new apprentices last week”)

< 5% of blogs are targeting actual queries like:

• “What is module construction?”
• “How much does commercial fit-out cost?”
• “BREEAM VS LEED: What’s the difference”

This shows that many companies are missing out on so called ‘low-hanging fruit keywords’. These queries have relatively high search volumes, but very little relevant information is available in the top results. By not targeting these keywords, you are losing out on traffic that can attract new customers and revenue.

0% of construction companies in this audit use author bios

E-E-A-T has been a pillar of Google’s Search Quality Rater for years. It stands for Experience, Expertise, Authoritativeness, Trustworthiness – and optimising for it is vital for SEO success.

Seeing as 0% of construction companies used author bios (one of the easiest ways to demonstrate E-E-A-T), it’s clear that the industry doesn’t have a great understanding of E-E-A-T principles.

So, how do you demonstrate E-E-A-T for your website and brand?

• Experience – It is important to show that your content was created by people with first-hand experience of the subject matter. This can be achieved by author bios or by directly referencing personal experience.
• Expertise – This is where accuracy and depth of content is vital. Make sure you cite reputable sources and case studies directly.
• Authoritativeness – This is where backlinks and consistent great quality content is important. By doing this, you build authority over time.
• Trustworthiness – It is important to provide honest and trustworthy content, provide clear contact and customer service information, and follow ethical content practices.

Want to know more about EEAT? Take a look at our E-E-A-T Checklist for construction websites

Content Strategy Takeaway

Even though most of the top 100 construction companies are posting regularly, they are not doing so strategically. Blogs and news sections are being used mainly for PR purposes and not as SEO tools.

In order to drive leads and visibility, companies should:

• Add author names, roles, expertise and publish dates
• Cite reputable sources and case studies
• Use keyword research to guide the content
• Structure content in topical clusters
• Include visuals, alt text
• Optimise internal linking throughout the content cluster and overall site.

With just some minor changes, the 100 construction companies could really see an increase in their search visibility – and start generating good revenue from their content strategy.

Page Speed & UX: The construction industry is building for desktop, not mobile

To audit website speed, I ran each homepage through Google Page Speed insights (mobile) to evaluate:

• Overall Performance score
• Web vitals (FCP, LCP, CLS, TBT)
• Page size and load stability.

And while I was expecting to see some issues, the results were far worse than anticipated. Only a handful of the selected companies optimise for mobile performance. While their websites may have a mobile version, it is usually slow and not at all user friendly. Let’s look at the research highlights before we dive deeper into this issue:

Page Speed: Key findings

Only 3% of Sites Meet Google’s mobile standards.

The most striking find is that only 3% of the construction homepages had a mobile performance score of 90 or above (Google rates 90 and above as a Good Score).  Additionally, 20% of homepages scored below 50, meaning they fall under Google’s poor category. This means most websites are slow to load and make it frustrating for users on mobile devices. Unfortunately for the construction industry, this isn’t just an SEO issue, it’s also a conversion issue.

So, why do construction companies not invest in mobile optimisation? With all these findings in mind, I asked my partner Stephy Damyanova who is the marketing manager at Group SCS and Systemair UK, two large companies operating in the construction industry, what her thoughts are on this issue. What I found interesting is that she wasn’t surprised by the data at all:

So, does that mean that mobile optimisation doesn’t matter for construction SEO?

Not at all! If anything, it presents a great opportunity for improvement.

Google ranks quick and user-friendly websites higher, and its analysis is mobile-first. So even if you have the most optimised and best-looking desktop website, Google will still prioritise your mobile loading speeds and stats. By optimising the mobile experience, you can score an easy SEO win and improve your rankings with very little effort.

Moreover, some key searches in the construction industry are more popular on mobile devices. Stephy explains, “Interestingly, the click volume of support-related queries is consistently higher on mobile than on desktop. This makes sense, as on-site staff are more likely to use their phones to resolve issues immediately rather than wait until they return to the office.”

Key findings

 Slow Page Load Times

• The average LCP (Largest Contentful Paint) was 15.46 seconds — more than 6x Google’s recommended threshold of 2.5s.
• FCP clocked in at 3.67 seconds – far more than ideal.
• These delays often result from oversized images, render-blocking scripts, and unused CSS frameworks.

Page Bloat & Layout Shift 

• With an average weight of 7.97MB, the homepages are significantly heavier than the best-practice benchmarks of <2 MB.
• 22% of sites had a CLS score above 0.1, meaning website elements shift as the page loads. This leads to user frustration, lower engagement and higher bounce rates.

Page Speed Takeaway

Nearly all of these websites are built for static desktop viewing and not for fast mobile experiences, which in 2025 is just not acceptable.

Here are some ways to improve slow page speeds

Compress images

Make sure you follow these best practices when uploading images to your website:

• Compress images with tools like Optimole or TinyPNG
• Don’t make images larger than they need to be
• Serve images in next-gen formats such as WebP.

Reduce Render-Blocking JavaScript

Reducing render-blocking JavaScript is vital for improving page load speed and Core Web Vitals like First Contentful Paint (FCP) and Largest Contentful Paint (LCP). Below is a quick step by step on how to reduce render-blocking JavaScript:

1. Use tools like Google PageSpeed Insights to highlight the scripts that delay rendering.
2. See if you can move Scripts to the bottom of <body>
3. Eliminate any unsued JavaScript
4. Use code splitting if you are using frameworks like React.
5. Minify & Compress the JS files
6. Finally, load the JavaScript on interaction (Lazy Load)

Prioritise Core Web Vitals Development.

The best way to improve your site’s speed is to take Core Web Vitals into consideration at the beginning. When designing and developing your site. At every stage, think about how the speed will be affected. Do you need that extra feature on your site? Is that animation important? Being conscious of site speed from the beginning will save you a lot of time in the future.

Final thoughts from an industry expert

To round off this report, I wanted to bring in an external perspective – someone with deep experience helping brands improve their organic presence.

So, I spoke to Tom Winter (SEOWind), an established voice in the SEO space and co-founder of SEOwind (a content intelligence platform used by agencies and marketers across Europe.

Here is what Tom had to say when I asked about the most common SEO mistakes construction companies make:

Tom’s quote speaks to a wider pattern uncovered in this audit: construction companies may have brand awareness and resources, but without an intentional, repeatable SEO strategy — content stagnates and visibility stalls.

Final thoughts & SEO recommendations

After auditing the top 100 UK construction companies by revenue two major insights became clear:

1. The top companies in the industry have a strong brand presence (which is great!)
2. However, that brand presence is majorly let down by its weak digital execution

These firms have the budget, reputation and domain rating necessary to excel at SEO, but when it comes to the technical side, content strategy, and mobile performance nearly all of them are falling short.

Key SEO patterns in the construction industry

• 81% of companies have strong domain ratings (DR ≥ 30)
• 36% are missing an H1 tag — a fundamental SEO element
• 24% don’t have a meta description
• 0% of blog content includes author bios (E-E-A-T red flag)
• Only 3% of sites pass Google’s mobile performance benchmark
• Content is often PR-driven, not SEO-driven
• Page sizes are bloated, and layout shifts are common

Recommendations for Construction Marketers & Agencies

Here is what you should be doing to either improve your website’s SEO or to get ahead of the industry giants.

Fix the Technical SEO

• Add descriptive <h1> tags on every key page
• Write clear, unique meta descriptions for core pages
• Ensure the homepage is indexable (check robots.txt, canonical tags)
• Implement schema markup (Organisation, Breadcrumb, Article, FAQs)

Focus on a content strategy

• Do in-depth keyword research — build content that answers real questions
• Publish content in topic clusters, not one-off posts
• Add author bios to establish trust and expertise
• Internally link from blog posts to service pages

Optimise for Mobile UX

• Compress images and reduce overall page size
• Use lazy loading and eliminate unused JavaScript/CSS
• Address Core Web Vitals: LCP, CLS, FID
• Prioritise mobile in every redesign — not just desktop aesthetics

Re-think your backlink strategy (if you have one)

• Don’t rely on legacy or passive links — create linkable assets
• Get featured in industry publications, niche directories, and local sites
• Monitor your backlink profile for spam and low-quality signals

Final Word

Most construction companies are focusing on looking good online – but very few companies have a strategy to perform well in search, to convert visitors or even to scale with their business goals.

This gap is your opportunity.

Whether you’re a mid-market contractor or a top 100 construction company, implementing these SEO basics can give you the edge over your competition.

If you need help with this, book a call and we can get you started with a FREE SEO website audit.

FAQs: SEO for Construction