Norway’s transmission system operator Statnett said on 5 October that its grid project costs were rising amid tight international supplier markets, higher interest rates and geopolitical uncertainty. For large grid infrastructure projects it put to the market in 2026, the company estimated that about 80–90% of cost increases reflected those factors. This is the operator’s general attribution, not a project-by-project audit.

The company said international supplier prices had risen markedly in recent years and remained high, increasing faster than general inflation. It expects constrained supply markets to contribute to further cost growth in grid construction. Uncertain interest rates also affect financing costs. Statnett cited geopolitical tensions in the Middle East as a source of macroeconomic uncertainty that could affect inflation, rates and commodity prices.

The 80–90% range does not mean every project budget will rise by that percentage. It refers to the share Statnett attributes to market prices, financing and uncertainty in cost increases observed among large projects sent to market during 2026. The company did not give one total cost-overrun figure or a uniform percentage for its entire portfolio. Project estimates are updated at several milestones and reported quarterly to Norway’s energy regulator, NVE.

Statnett also said changes in needs, technical solutions, government requirements and permitting processes affect investment costs. The company described procurement measures including more standardised and predictable purchasing packages, strategic agreements and early supplier dialogue. It also noted that some equipment must withstand Norwegian winters and changing climate conditions, limiting the use of off-the-shelf components and the scope for reducing specifications.

The operator said it was prioritising transmission corridors, consumption growth and security of supply in major cities and Finnmark. It described the government’s ambition to shorten grid-building procedures as potentially helpful over time, rather than an immediate cost offset. The release did not quantify future customer bills, tariff changes or expected overruns for individual projects. Its percentages are Statnett’s assessment and apply to the stated group of large projects.

The company says it updates estimates at defined project milestones and reports them to the regulator quarterly. That process provides a framework for tracking how price pressures affect individual schemes, but the release itself contains no project-level contract prices or budget tables.