Hiring a Marketing Person vs an Agency: What’s Right for Construction Companies?

At some point, every growing construction company hits the same question. You know you need proper marketing — word of mouth and the directors’ contacts have carried you this far, but you want to grow beyond that. So do you hire a marketing person or bring in an agency?

The wrong decision can cost you a year’s worth of time and budget with nothing to show for it. So let’s do this properly — real costs, honest pros and cons, and a straight answer on when each option makes sense for a construction company.

What a Marketing Hire Actually Costs (The Real Number)

Most construction directors look at salary alone and think “that’s cheaper than an agency.” But salary is the starting point, not the total.

A marketing manager or marketing executive with the experience to actually make a difference to a construction company will cost £30,000–£50,000+ in base salary. At the lower end, you’re getting someone fairly junior. At the upper end, you’re getting someone with genuine strategic experience — but even then, you’re getting one person.

Now add the costs that most people forget to budget for:

• Employer’s National Insurance and pension contributions — add roughly 15% on top of salary. On a £40k hire, that’s another £6,000 per year.
• Tools and software subscriptions — SEO tools (Ahrefs, SEMrush), design software (Adobe Creative Suite), CRM platform, email marketing software, social media scheduling, analytics tools. Realistically £200–£500 per month, or £2,400–£6,000 per year.
• Training and development — marketing moves fast. If you’re not investing in keeping their skills current, their output will fall behind within a year.
• Recruitment costs — if you use an agency to hire, budget 15–20% of salary as a one-off fee. That’s £6,000–£10,000 just to find the right person.
• Management time — someone has to brief them, review their work, set direction, and make decisions. That someone is usually a director. What’s your time worth per hour?
• Holiday, sick cover, and downtime — when they’re on annual leave (28+ days including bank holidays), marketing stops. When they’re off sick, marketing stops. When they hand in their notice and you’re looking for a replacement, marketing stops for months.

True annual cost: £45,000–£70,000+ — and that’s before you’ve spent a penny on ad budgets or external production costs like video and photography.

That changes the comparison with an agency fairly significantly.

The Pros of Hiring In-House

Let’s be fair about what you do get with an in-house marketing hire or agency construction comparison leaning toward the hire:

They’re dedicated to your business full-time. Nobody else is competing for their attention. They’re embedded in your company, working on your marketing five days a week.

They learn your industry deeply. Over time, a good marketing person develops genuine understanding of your projects, your clients, and your procurement processes. That institutional knowledge has real value.

They’re available for ad-hoc requests. Need a quick website update? Want a case study written while the project’s still fresh? An in-house person can pivot quickly without scoping conversations or additional invoices.

They build internal knowledge. Systems, processes, brand guidelines — it all stays in-house rather than living with an external supplier.

These are real advantages. But there’s a fundamental problem that most construction companies don’t think about until it’s too late.

The “One Person Can’t Do Everything” Problem

This is where most in-house marketing vs agency construction company decisions fall apart in practice.

Think about what “marketing” actually means for a construction company. It’s not one skill. It’s five or six different specialisms:

• Strategy — understanding your market, positioning, and how to generate opportunities in B2B construction
• SEO — technical site optimisation, keyword research, content strategy for organic search
• Copywriting and content — case studies, website copy, blog articles, LinkedIn posts, tender support content
• Design — website design, branding, brochure design, presentation decks, social media graphics
• Paid advertising — Google Ads, LinkedIn Ads, campaign management, budget optimisation
• Video and photography — planning, directing, editing project videos and site photography
• Social media — LinkedIn strategy, content scheduling, community engagement
• CRM and automation — lead tracking, pipeline management, email sequences, reporting

That’s not a job description. That’s an entire department.

What actually happens when you hire one marketing person? You get someone who’s good at one or two of those things and mediocre at the rest. They’re strong on social media but can’t write a tender-ready case study. They can manage your LinkedIn but haven’t got a clue about technical SEO. They can design a nice graphic but wouldn’t know where to start with Google Ads.

This isn’t a criticism of the people — it’s an impossible brief. You wouldn’t hire one person and expect them to be a groundworker, a quantity surveyor, a site manager, and a plant operator. But that’s essentially what you’re asking a “marketing person” to do.

The result? A marketing hire who’s busy — posting on social media, updating the website, creating content — but the needle isn’t moving because the things that actually drive commercial results (SEO, paid advertising, conversion optimisation) are either being done badly or not at all.

The Pros of Using a Specialist Agency

When you work with an agency that genuinely understands construction marketing, you get something fundamentally different:

A team of specialists, not one generalist. Your SEO is handled by someone who does SEO all day. Your ads are managed by a dedicated ads specialist. Your copy is written by someone who writes for construction companies. Each discipline is covered by a person whose entire career is built around that skill.

Proven systems and processes. A decent agency has done this before — specifically for construction companies. They know what works, what doesn’t, and how long it takes. They’re not learning on your budget.

Case studies from your industry. The PKB Civils case study speaks for itself — £200,000 in attributed revenue within the first twelve months. That’s a civil engineering contractor that went from directors being the sole source of new work to marketing generating qualified opportunities independently.

No HR overhead. No recruitment fees, no employment contracts, no performance reviews. If it’s not delivering, you have a conversation and either fix the approach or part ways. Try doing that with an employee — it’s a six-month process involving ACAS.

Scalability. Need to push harder because you’ve got capacity to fill? Scale up. Won a major contract and you’re at full stretch? Scale down. Try asking your employee to work half-time for a quarter.

The Cons of Using an Agency

In the interest of being straight with you:

They’re not in your office every day. An agency works with multiple clients. You’ll have a dedicated account manager, but they’re not physically embedded in your business.

There’s a learning curve. They need to understand your business, your market, and your clients. A good agency invests heavily in this upfront, but they’ll never know your business quite the way a long-serving employee does.

You need to find the right one. Most marketing agencies don’t understand construction. They’ll treat you like a consumer business and apply the same playbook they use for dentists and kitchen showrooms. You need one that understands procurement, B2B sales cycles, and what a QS actually cares about.

When In-House Makes More Sense

If you’re a larger construction business — turnover of £10 million or more — with enough marketing volume to justify a full-time role, an in-house marketing manager vs agency construction setup can work. But the smartest companies at that scale don’t choose one or the other. They hire an in-house coordinator for the day-to-day and pair them with a specialist agency for SEO, paid advertising, strategic planning, and campaign execution.

Internal knowledge and availability, with external expertise and firepower. Best of both worlds.

When an Agency Makes More Sense

For construction companies turning over £1–5 million — which is where most of the businesses we work with sit — an agency is almost always the better decision. Here’s why:

The marketing need is real. You need to generate opportunities beyond the directors’ personal networks. You need a website that works as a sales tool. You need to be visible on LinkedIn. You need SEO driving organic enquiries. But the volume doesn’t justify a £45–70k annual commitment to one person who can only cover a fraction of what’s needed.

At this stage, an agency gives you access to an entire team for similar or less money than a single hire — and that team is delivering across every discipline from day one, not spending six months trying to learn skills they don’t have.

Sometimes the Answer Is Both

We’ll be honest — for some businesses, the right answer is a combination. An in-house marketing coordinator (£25–30k level) who handles day-to-day coordination, keeps the CRM updated, and captures project photography — paired with a specialist agency delivering strategy, SEO, advertising, and content.

This works particularly well in construction because so much raw material — site photos, project information, client relationships — lives inside the business. Someone internal captures and organises it. An external team turns it into results.

The Bottom Line

Start with the honest maths. The true cost of an in-house hire is significantly more than the salary alone. And one person, however talented, cannot cover the breadth of disciplines that effective construction marketing requires.

For most construction companies in the £1–5 million range, a specialist agency delivers better results for comparable or lower cost — with none of the HR risk and all of the expertise.

PKB Civils went from zero marketing to £200k in attributed revenue within twelve months. That’s not because agencies are magic — it’s because a team of specialists executing a proven system will always outperform one person trying to do everything.

Ready to Talk It Through?

If you’re a construction company director weighing up this decision, we’re happy to have an honest conversation about what makes sense for your specific situation. No pitch, no pressure — just a straight discussion about your business, your goals, and whether an agency relationship (with us or anyone else) is the right move.

Book a strategy call and let’s work it out together.