Sustainability of defense real estate: technical complexity in large-scale transformation

The sustainability of defense real estate begins with a fundamental problem: the existing building stock is technically severely outdated. The Central Government Real Estate Agency (RVB) manages thousands of buildings at hundreds of locations, a large proportion of which predate modern energy and performance requirements..

This legacy infrastructure translates directly into technical challenges. Installations are often inefficient, building envelopes poorly insulated, and structural systems not designed for the modern integration of sustainable systems. Moreover, detailed data on energy performance is lacking in many cases, which complicates the development of optimization strategies.

As a result, the sustainability challenge shifts from standard renovation to the complex technical transformation of existing systems.

Integration of installation technology and electrification

A core component of sustainability is the transition to all-electric installations and the reduction of fossil energy. Technically, this means replacing traditional heat generation with heat pumps, electrifying hot water systems, and integrating sustainable generation, such as PV installations.

This transition requires far-reaching adjustments to building installations as well as infrastructure. Electrification significantly increases the peak load on installations and the power supply. In international defense projects, this leads to necessary upgrades of electrical systems, distribution systems, and cabling to handle the higher power demand.[1]

At the same time, optimizing HVAC systems requires an integrated approach, in which the building envelope, installations, and usage patterns are optimized simultaneously. Without improvements to insulation and airtightness, the efficiency of electrical systems remains limited.

Grid congestion and energy infrastructure as bottleneck

One of the biggest technical challenges in the Netherlands is grid congestion. For a significant portion of government real estate – including defense sites – limited grid capacity poses a direct obstacle to electrification and sustainable generation.[2]

The sustainability upgrade of barracks and bases leads to a significantly increased demand for electricity due to heat pumps, electric vehicles, and energy management systems. This creates a mismatch between demand and available grid capacity.

Technical solutions lie in local energy storage (batteries), smart energy control, and demand response. Energy control, the active management of supply and demand in buildings, is becoming essential to reduce peak loads and keep systems stable.

This means that sustainability is not only a structural or installation engineering challenge, but emphatically also a system integration issue at the energy infrastructure level.

Standardization and industrialization of construction concepts

To achieve the scale and speed of the sustainability challenge, the RVB is focusing on standardization and industrial construction. This involves constructing buildings from standardized modules, including technical rooms and installations.[3]

Technically, this offers advantages in design optimization, reproducibility, and maintenance. Standardized installations can be designed, tested, and implemented more efficiently. At the same time, this approach requires a high degree of system engineering, where components must be mutually compatible across different building types and usage functions.

For existing buildings, however, this standardization is less self-evident. Here, customization must be combined with standardized solutions, leading to hybrid technical configurations.

Operational requirements versus sustainability

Defense real estate distinguishes itself from civilian real estate through specific functional requirements. Buildings range from workshops and warehouses to high-tech facilities and accommodation buildings, each with unique technical installation requirements.

This diversity limits the applicability of uniform sustainability measures. For example, workshops require high ventilation capacity and robust installations, while accommodation buildings are specifically focused on comfort and energy efficiency.

In addition, operational readiness and reliability always take priority. Installations must function under all circumstances, which may require redundancy and overdimensioning – often in conflict with energy optimization.

Scale and implementation complexity

The sustainability challenge for defense real estate is exceptionally large in scale. It involves thousands of buildings that must be modernized at an accelerated pace, partly due to years of backlogs in maintenance and investment.

Technically, this entails an enormous demand for engineering capacity, specialist knowledge, and execution capacity. At the same time, external factors such as nitrogen regulations, personnel shortages, and material availability create additional complexity.

This combination of scale, acceleration, and technical complexity makes the sustainability of defense real estate one of the most challenging infrastructure tasks of the moment.

Conclusion: system integration as the key

The sustainability of defense real estate is not a sum of individual measures, but an integrated technical systems challenge. Outdated buildings, complex installations, grid congestion, and operational requirements converge in a single transition.

Successful sustainability therefore requires a combination of deep retrofit, electrification, smart energy systems, and standardized building concepts. For technical experts, the core challenge lies in designing robust, scalable, and future-proof systems that are both sustainable and operationally reliable.

[1] From Army Barracks to Eco-Friendly Dorms: Fort Cronkhite's Sustainable Transformation | Department of Energy

[2] Central Government Real Estate Agency and grid congestion: challenges and solutions – CE Delft

[3] Defense Real Estate | Central Government Real Estate Agency