What would happen if every building had to last 200 years?

For decades, construction has focused on building faster, cheaper and more efficiently. Modern methods of construction, offsite manufacturing and value engineering have transformed how we build. But perhaps we should be asking a more fundamental question - what if every building had to last 200 years, writes John Ridgeway?

It's a provocative idea, but one that challenges almost every aspect of modern construction, from design and material selection to maintenance, sustainability and procurement. So, with this in mind, let’s ask another question - would we design buildings differently? The answer is almost certainly yes.

Much of today's construction is driven by capital cost. Developers understandably focus on delivering projects within tight budgets, while contractors compete in highly competitive markets where value engineering is commonplace. But if a building were expected to remain functional for two centuries, the conversation would change dramatically.

Architects would place greater emphasis on flexibility, allowing buildings to adapt to changing technologies and patterns of occupation. Materials would be selected for durability rather than simply their upfront cost. Maintenance would become a design consideration rather than an afterthought.

Victorian warehouses that have become luxury apartments, former schools converted into offices and industrial buildings transformed into creative workspaces all demonstrate the value of designing structures capable of adapting over time.

The Greenest Building May Already Exist

The World Green Building Council has repeatedly highlighted that the greenest building is often one that already exists. Demolishing and rebuilding consumes enormous amounts of embodied carbon through the manufacture, transportation and installation of new materials, while also generating significant construction waste.

According to the UK Green Building Council (UKGBC), embodied carbon can account for up to 50% of the whole-life carbon emissions of a new building, and an even higher proportion in highly energy-efficient developments. If buildings were designed to remain useful for 200 years, demolition might become the exception rather than the norm.

Instead of replacing buildings every few decades, we would invest more heavily in refurbishment, retrofit and adaptation, preserving both the structure and the carbon already locked within it.

The construction industry already understands the importance of durability. Products are routinely tested for service life, weather resistance, structural integrity and long-term performance. Waterproofing systems, roofing materials, façades and structural components are expected to perform reliably for decades. A 200-year design life would simply extend that thinking.

Material selection would increasingly focus on lifetime performance, repairability and ease of maintenance. Components designed for replacement would become modular, allowing buildings to evolve without major structural intervention.

The concept of whole-life costing, already promoted by organisations such as the Royal Institution of Chartered Surveyors (RICS), would move from being good practice to becoming the basis of every design decision.

Would Procurement Change?

This applies equally to procurement, which too often rewards the lowest capital cost rather than the greatest long-term value. If clients expected buildings to perform for two centuries, procurement would naturally move towards quality, resilience and lifecycle performance.

Questions would become less about "What is the cheapest solution?" and more about:

• How long will it last?
• How easily can it be maintained?
• Can components be repaired?
• Can the building adapt to future uses?
• What is the total cost over 200 years?

The Construction Playbook, published by the UK Government, already encourages public sector clients to adopt whole-life value rather than lowest upfront cost when procuring projects. A 200-year mindset would accelerate that transition.

Building for a Changing Climate

We must also accept that the UK's climate is changing. The Met Office reports that the UK is experiencing warmer temperatures, more frequent intense rainfall and an increasing likelihood of extreme weather events as the climate changes.

Buildings designed to last 200 years would need to withstand conditions that may be very different from those experienced today. Flood resilience, overheating, drainage capacity, roofing performance and structural robustness would all become even more important considerations. Designing for resilience would no longer be viewed as future-proofing. It would simply become responsible design.

That said, even the best-designed buildings require maintenance. One reason many buildings fail to reach their potential lifespan is not because they were poorly designed, but because maintenance has been deferred or overlooked.

The Building Research Establishment (BRE) has long emphasised the importance of planned maintenance in protecting building performance and extending service life. A building expected to last 200 years would almost certainly include a long-term asset management strategy from day one. Digital twins, condition monitoring, predictive maintenance and comprehensive building information would become standard practice throughout the building's life.

Would It Change How We Measure Success?

Today's construction industry often celebrates the completion of a project. Perhaps success should be measured differently. Imagine if buildings were recognised for remaining functional, adaptable and efficient after 100 or even 150 years.

Imagine awards celebrating the buildings that required the fewest repairs, generated the least carbon through refurbishment and continued serving their communities for generations. That would represent a very different definition of quality.

Most people involved in construction will never see the buildings they create reach the end of their lifespan. Perhaps that's exactly the point, because every project leaves a legacy that extends far beyond the completion date.

Designing buildings capable of lasting 200 years would encourage the industry to think differently about value, sustainability and responsibility. It would reward quality over short-term savings and adaptability over obsolescence.

So, the real question isn't whether every building could last 200 years. It's whether the construction industry should start designing as though they might.

Frequently Asked Questions

1. How long are commercial buildings designed to last?

The design life of a commercial building depends on its purpose, materials and structural design. Many modern buildings are designed with a service life of around 60 years, although well-designed and well-maintained structures can remain in use for well over 100 years. Designing for longevity increasingly focuses on adaptability as well as durability.

2. What is the design life of a building?

A building's design life is the period it is expected to perform safely and effectively before major reconstruction or replacement is required. It influences decisions about structural materials, waterproofing, roofing systems, façades and maintenance strategies, helping designers consider whole-life performance rather than just initial construction costs.

3. Why is designing buildings to last longer more sustainable?

Longer-lasting buildings reduce the need for demolition and reconstruction, helping to preserve the embodied carbon already invested in the structure. Extending a building's lifespan also reduces construction waste, lowers demand for new materials and supports a more circular approach to the built environment.

4. What is embodied carbon in construction?

Embodied carbon refers to the greenhouse gas emissions generated through the extraction, manufacture, transportation, installation, maintenance and eventual disposal of construction materials. Reducing embodied carbon has become one of the biggest priorities in creating more sustainable buildings.

5. Is refurbishing a building better than demolishing and rebuilding?

In many cases, yes. Refurbishment can significantly reduce embodied carbon by retaining the existing structure while improving energy performance, functionality and aesthetics. Every project should be assessed individually, but retaining usable buildings often delivers substantial environmental benefits.

6. What is whole-life costing in construction?

Whole-life costing evaluates the total cost of owning, operating, maintaining and eventually replacing a building over its entire lifespan. Rather than focusing solely on the initial construction cost, it considers maintenance, repairs, energy use and future refurbishment to identify the best long-term value.

7. Why is durability important in modern building design?

Durable buildings require fewer repairs, experience less disruption and consume fewer replacement materials over time. Specifying high-quality materials and systems can reduce maintenance costs while improving resilience against weather, wear and changing environmental conditions.

8. How does climate change affect building design?

Buildings are increasingly being designed to cope with more frequent extreme weather, higher temperatures and heavier rainfall. This means incorporating greater flood resilience, effective drainage, improved waterproofing, overheating mitigation and materials capable of performing throughout a changing climate.

9. What is adaptable building design?

Adaptable building design allows a structure to change its use throughout its lifetime without requiring major demolition or reconstruction. Flexible floor layouts, modular components and future-proofed services help buildings remain useful as occupier needs evolve.

10. Why is planned maintenance important for buildings?

Even the highest-quality buildings require regular maintenance to achieve their intended lifespan. Planned maintenance helps identify issues before they become major problems, protecting structural integrity, reducing repair costs and extending the life of building components.

11. Can designing buildings to last longer reduce construction costs?

Although longer-life buildings may require greater investment during construction, they often deliver lower lifetime costs through reduced maintenance, fewer repairs, longer replacement cycles and improved operational performance. Whole-life value frequently outweighs lower upfront costs.

12. Should every new building be designed to last 200 years?

Not every building will require a 200-year design life, but asking this question encourages architects, engineers and developers to prioritise durability, adaptability and sustainability. Designing with future generations in mind can help create buildings that remain valuable, functional and environmentally responsible for decades to come.