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The Fastest-Growing Construction Companies in the UK (2025 Edition)

The UK construction sector is constantly shifting — adapting to new technologies, policy changes, and evolving demands in housing, infrastructure, and sustainability. But even in a competitive landscape, some companies are making serious moves, growing at impressive rates and catching the attention of the wider industry.

From smart modular builders to giants refocusing on partnerships and regeneration, this year's crop of fastest-growing firms show that construction is as much about strategy as it is about steel and concrete. Let's take a look at the UK construction companies that are growing the fastest — and why they're worth watching.

1. Vistry Group – All-In on Partnerships and Housing

Vistry is having a bit of a moment. In the past year, it’s seen a huge 30% jump in revenue, crossing the £4 billion mark. The company’s sharp pivot toward partnership housing — working closely with housing associations and local authorities — has paid off big time.

Despite a few bumps in the road (including a profit warning linked to build cost estimates), Vistry has tightened up its operations and now holds a stronger order book than ever. Its merger with Countryside also played a huge role in strengthening its position as one of the UK’s largest housebuilders.

What’s driving growth:

Shift to affordable housing partnerships
Smart acquisitions and consolidation
Deep pipeline of long-term development deals

2. Laing O’Rourke – Bouncing Back With Big Projects

After a few rocky years, Laing O’Rourke is firmly back in the game. The company posted a £723 million increase in turnover, with a big chunk of that growth coming from its involvement in hospital and major infrastructure schemes as part of its strategic supplier relationship with the UK government.

Their order book has ballooned to £7.6 billion, showing clear signs that confidence in the brand is strong again — and that their project delivery machine is humming.

Why it matters:

Leading NHS hospital projects across the UK
Strong backing from public-sector clients
Back in profit, and scaling quickly

3. Balfour Beatty – Still the Giant, Still Growing

It’s no surprise that Balfour Beatty, the UK's largest contractor, makes the list. But what’s impressive is that despite its already enormous scale, it still managed to grow turnover by 7% last year — adding nearly £664 million in new revenue.

Its UK Construction division alone hit £3 billion, driven largely by major transport infrastructure projects. The company also boasts a monster £18.4 billion order book, proving it’s still the top dog when it comes to landing the biggest contracts.

Where they shine:

National highways, rail and transport projects
Consistent performance at scale
Major player in both public and private sectors

4. Kier Group – Quietly Climbing the Ranks Again

After weathering some tough financial times, Kier Group has made a strong comeback — with a 17% revenue boost bringing turnover close to £4 billion. Kier’s resurgence has been fuelled by its reliable delivery on public-sector contracts, especially in education and highways.

The company is also trimming the fat and focusing on its core strengths: construction, infrastructure, and property services.

Why they’re growing:

Restructured for financial stability
Focused on key government frameworks
Reliable delivery = repeat business

5. Morgan Sindall – Low-Key, High-Impact

Morgan Sindall doesn’t always make flashy headlines, but that’s kind of their style — and it's working. The firm posted a 14% revenue increase, bringing in just over £4.1 billion last year. It’s one of the most consistently high-performing contractors in the UK, thanks to its diversified approach.

They’re big in fit-outs, infrastructure, public housing, and development. And critically, they’re known for treating people right — which has earned them a strong reputation among both clients and employees.

What makes them stand out:

Diverse business units spreading risk
Strong culture and leadership
Regularly outperforming peers on profit margins

6. Curo Construction – Doubling Down

Curo Construction might not be a household name (yet), but they’ve made massive strides — doubling their turnover in a year from £77 million to £159 million. That’s a whopping 106% increase.

They focus on commercial new-builds and fit-outs, particularly in and around London and the South East. It’s clear their approach is working — and they’re starting to win bigger jobs as a result.

Growth drivers:

Strategic wins in booming regions
Solid project delivery and client retention
Smart leadership scaling sustainably

7. Gratte Brothers – Engineering a Big Jump

Gratte Brothers, a well-established M&E (mechanical & electrical) firm, has seen a major 76% increase in turnover, hitting £220 million. As demand grows for complex building services — particularly in data centres, healthcare, and commercial developments — Gratte has been able to scale up rapidly.

Their reputation for engineering precision and project control is a big part of what’s fueling their growth.

Why they’re winning:

Niche expertise in high-demand sectors
Solid reputation with Tier 1 contractors
Growing focus on tech and digital buildings

8. Reds10 – Modular on the Move

Reds10 is riding the modular wave in a big way. Their turnover jumped 70%, reaching £143 million, driven by growing demand for offsite, modular construction — particularly in the public sector.

They’ve carved out a strong niche delivering quick, sustainable buildings for schools, healthcare, and defence projects. With clients looking for faster, greener solutions, Reds10 is in the right place at the right time.

Big wins:

Growing portfolio of NHS and MoD contracts
Investment in manufacturing and innovation
Agile and future-focused business model

9. JN Bentley – Building on Infrastructure

JN Bentley, a civil engineering firm, saw turnover climb by 47%, reaching £388 million. A big part of this growth came from work in the water sector, tied to the Asset Management Plan (AMP) cycle — particularly with clients like Yorkshire Water and Severn Trent.

Bentley’s ability to consistently deliver on vital infrastructure jobs has positioned them as a reliable mid-tier powerhouse.

Key advantages:

Deep client relationships in utilities
Strong performance in regulated sectors
Steady, sustainable project growth

10. Glencar Construction – A New Star on the Rise

Founded in 2016, Glencar Construction is one of the youngest companies on this list — and one of the fastest growing. Their turnover now stands at £418 million, with high-profile projects like the Moderna Innovation Centre and data centres for tech giants under their belt.

In just a few years, Glencar has gone from a startup to a serious player, known for logistics and high-tech industrial builds.

Why they’re on fire:

Agile team delivering major schemes
Strong foothold in booming sectors
Smart marketing and strategic partnerships

11. Readie Construction – Logistics-Driven Growth

Readie Construction has quietly become a go-to for logistics and industrial builds, with revenue climbing from £179 million to over £421 million in just a couple of years.

They’ve worked with clients like DP World and DHL, delivering massive warehousing and distribution hubs. Their employee-owned model also sets them apart in a competitive field.

Noteworthy strengths:

Specialist in logistics infrastructure
Fast delivery at scale
Employee ownership fuels buy-in

12. Tilbury Douglas – Reborn and Rising

Back as an independent business after its time under the Interserve umbrella, Tilbury Douglas is showing real momentum. With a £507 million turnover and a healthy £1 billion+ order book, the company is proving its rebrand is more than just a new name.

Their work spans healthcare, education, and civil engineering, and they’ve put a clear focus on rebuilding trust and delivering value.

Where they’re headed:

Clean slate and renewed direction
Deep bench of public-sector experience
Smart use of digital tools and modern methods

13. Mace – Consistently Scaling Up

Mace has long been a name associated with high-profile London projects, but they’re also making moves globally. With a 25% jump in revenue last year, hitting £2.36 billion, Mace has continued to win big — particularly in consultancy and project management, as well as construction.

They’re now leading on iconic schemes like the new HS2 stations and expanding internationally, all while maintaining a focus on innovation and sustainability.

What’s impressive:

Diversified global operations
Known for premium project delivery
Ambitious targets on carbon and digital tech

Final Thoughts

The fastest-growing construction firms in the UK aren’t just building more — they’re building smarter. Whether it’s by embracing modular methods, focusing on housing partnerships, or carving out niches in logistics and engineering, these companies are leading the charge in a fast-changing industry.

For jobseekers, subcontractors, and even investors, these names are worth watching. They’re not just delivering projects — they’re shaping the future of how construction is done in the UK.

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