Ocotober 2025
If there’s one theme that dominates our roundup of top megaprojects in Europe this year, it’s “energy.” Countries throughout the continent have been making huge investments in energy infrastructure. They’re seeing the long-term benefits of renewable energy sources in strengthening their energy security and ensuring that projects remain operational for decades after they are commissioned.
Here are five significant megaprojects throughout Europe set to start construction in 2025, listed alphabetically. (Note: The details provided reflect information available at the time of publishing. Given the dynamic nature of construction, project timelines and costs may evolve.)
Eastern Green Link 1
Location: Scotland/North East England
Sector: Energy
Total Cost: £2.5 billion
Construction Start: March 2025
Anticipated Completion: 2029
The United Kingdom is transforming its energy infrastructure, and one of the most ambitious projects underway is the Eastern Green Link 1 (EGL 1)—an undersea electricity superhighway. This large-scale renewable energy project supports the UK’s goal of developing a locally generated power system and achieving net zero emissions by 2050.
Onshore, new converter stations (which convert AC, used by the grid, to DC for long-distance transmission and back again) and substations (which manage and distribute power flow across the grid) are being constructed in Torness in southeast Scotland and Hawthorn Pit in northeast England. From each station, underground cables will extend to landfall points where they connect with the marine cable.
Offshore, a 176 km high-voltage direct current (HVDC) subsea cable will run beneath the North Sea, transmitting Scotland’s renewable output into England’s electricity grid. Together with the onshore connections, the line will span 196 km.
When the 2 GW link goes live in 2029, it will be capable of supplying renewable power to as many as two million homes across England—making it one of the UK’s most significant clean energy investments to date.
Gate Burton Energy Park
Location: East Midlands, England
Sector: Energy
Total Cost: £269 million
Construction Start: October 2025
Anticipated Completion: 2028
One of the UK’s key commitments on its path toward net zero is to deliver primarily clean energy by 2030. The Gate Burton Energy Park will play a significant role in this, supporting the country’s goals for low-carbon energy output.
Encompassing almost 1,700 acres, this substantial solar farm—located in Lincolnshire along the middle of England’s east coast—will generate, store and transmit up to 500 MW of electricity. This will power over 160,000 homes—without the more than 100,000 tons of annual carbon emissions that traditional power sources would have produced.
For solar farm projects, the design and location matter. An underground cable layout and the southern corridor were chosen to minimize visual impact and disruption to residential and habitat sites.
Green Volt Offshore Wind Farm
Location: Scotland
Sector: Energy
Total Cost: £2.5 billion
Construction Start: November 2025
Anticipated Completion: 2029
About 80 kilometers off the northeast coast of Scotland, near Peterhead, construction is set to begin on the Green Volt Floating Offshore Wind Farm—a renewable energy project positioning the UK and Scotland at the forefront of floating wind innovation.
Green Volt will pull double duty with its 1.5 TWh of expected annual output. It’s designed to supply clean power directly to oil and gas platforms in the North Sea, replacing gas and diesel generators, while exporting most of its electricity to the UK’s national grid—enough to power around 300,000 homes. Altogether, the project is forecast to avoid roughly 1 million tonnes of greenhouse gas emissions each year, advancing Scotland’s target to cut offshore emissions by 50% and achieve net zero by 2045.
When complete in 2029, Green Volt will comprise 35 turbines secured on floating substructures with a combined capacity of 560 MW—making it Europe’s first commercial-scale floating wind farm and the continent’s largest. It will no doubt serve as a model for the future of offshore wind development worldwide.
Nuclear Waste Repository
Location: Forsmark, Sweden
Sector: Energy & Sustainability
Total Cost: 120 billion SEK
Construction Start: Early 2025
Anticipated Completion: 2080
Energy and sustainability converge in this monumental undertaking by the Swedish government. As the country transitions from fossil fuels to nuclear power—now accounting for about 30% of its electricity and growing—it has become imperative to develop a long-term strategy for safely managing spent nuclear waste.
The solution: store stabilized nuclear waste in iron, seal it in corrosion-resistant copper containers and bury them in tunnels built into 1.9-billion-year-old bedrock 500 meters below ground.
Located in Forsmark, along the Gulf of Bothnia on Sweden’s east coast, the repository will accommodate at least 6,000 containers holding 12,000 tons of spent nuclear fuel. Each will be encapsulated in bentonite clay and placed within 60 km of tunnels.
Due to the extensive design and preparation work required, the first containers are expected to be deposited in the late 2030s, with the final containers stored in the 2080s—after which the tunnels will be sealed off. They’re being engineered to remain secure for up to 100,000 years.
Peștera II Onshore Wind Farm
Location: Consțanta, Romania
Sector: Energy
Total Cost: €500 million
Construction Start: Late 2025
Anticipated Completion: TBD
Romania is about to get its second onshore wind farm. Located in Peștera, a village in Constanța County, near the Black Sea coast, the Peștera II wind farm will leverage the area’s strong wind currents and accessibility to existing infrastructure to streamline electricity transmission. The turbines’ collective planned capacity of up to 400 MW will generate enough renewable power to supply 1.4 million households per year.
Like many European countries, Romania is committed to increasing its clean energy supply, boosting energy independence and cutting carbon emissions. More broadly, the Peștera II wind farm will contribute to the momentum that Europe has established toward shared sustainability initiatives and CO2 reduction targets.
Technologies That Drive Energy Megaproject Performance
In energy projects, digital tools help teams translate complexity into actionable insights and deliver on planned outcomes. Whether the goal is to optimize efficiency, strengthen cost certainty or reduce emissions, technology provides the visibility and control needed to turn ambitious energy targets into measurable results.
Meeting energy megaproject outcomes, such as efficiency, reliability and cost control, starts long before construction begins. Building Information Modeling (BIM) and Value Engineering (VE) form the foundation for smarter, more strategic project decisions. BIM’s data-rich models integrate design, schedule and cost into one interactive view, allowing teams to anticipate conflicts and plan more accurately. VE complements that process by challenging baseline choices and exploring alternatives that maintain performance while lowering costs. The result is a measurable improvement—less rework, less waste and greater predictability from design through delivery.
Building on that foundation, predictive analytics strengthens project certainty. By drawing on historical data and real-time inputs—such as weather trends, supply chain performance and resource availability—these tools highlight potential risks and cost drivers before they become expensive, time-consuming problems. Teams can test “what-if” scenarios, forecast outcomes and adjust plans proactively to keep projects on track. For energy megaprojects with complex interdependencies, this foresight is invaluable in minimizing disruptions and maintaining control over the project.
Finally, as sustainability becomes a key measure of success for energy construction, carbon tracking and emissions monitoring technologies play an increasingly critical role. These systems capture vital data to calculate and reduce emissions throughout the lifecycle—an imperative as megaprojects alone account for 38% of global emissions. They also provide the transparency needed to meet regulatory standards and stakeholder expectations. Over time, this data-driven visibility enables continuous improvement, helping project teams refine sustainability performance with each new phase and build.
Shaping the Future of Megaproject
These 2025 megaprojects reflect Europe’s commitment to energy, sustainability and long-term infrastructure planning. Each project highlights unique challenges and the scale of investment needed to transform energy systems, but the common thread is a focus on measurable outcomes, including efficiency, cost control and reduced emissions.
Together, these five projects offer a glimpse into how Europe is shaping its energy future, demonstrating the innovation and planning required to deliver infrastructure that is transformative for communities and the environment for decades to come. Collectively, they illustrate recurring trends—both in the types of projects being pursued and how they’re being executed.
Contruent Enterprise helps companies worldwide manage megaprojects and their costs. Learn more or request a demo today.