Spain | Grid congestion and its role in housing construction. August 2026

Summary

Grid congestion may delay housing construction and constrain new residential developments in high-demand areas. Accelerating investment in electricity networks, improving coordination between urban planning and grid planning, and optimizing the allocation of network capacity will be key to supporting residential growth.

Key points

• Key points:
• Insufficient grid capacity is delaying housing construction. More than 80,000 planned homes depend on the construction of new electricity infrastructure.
• The electricity grid is becoming increasingly congested and requires growing interventions to maintain system stability. Expanding the grid requires years of planning, investment and coordination, and can take between five and eight years in large urban developments.
• The capacity available at most distribution grid nodes is very limited. 88 % of distribution nodes have less than 1 MW of available capacity, constraining the connection of new residential and large-scale economic projects.
• Accelerating investment in electricity networks, adopting a more forward-looking approach to grid expansion, improving coordination between urban planning and electricity network planning, and enhancing the allocation of available capacity would help unlock new investment projects.
• The Royal Decree, approved on 28 July, provides up to €17.9 billion in additional investment for electricity networks through 2030, while promoting anticipatory investment, digitalisation and greater transparency. Its impact will depend on effective implementation and on the additional connection capacity it ultimately delivers.

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