One of the most common questions we hear from homeowners across Devon is whether tree roots can damage house foundations.

It’s understandable. Large trees growing close to buildings can look concerning, and there’s plenty of conflicting information online. Some people assume any tree near a property is a problem, while others dismiss concerns altogether.

The reality sits somewhere in the middle.

While tree roots can contribute to foundation issues in certain circumstances, the vast majority of trees growing near homes never cause structural problems. Understanding when roots become a risk and when they don’t can help property owners make informed decisions rather than acting on fear alone.

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How Tree Roots Grow

A common misconception is that tree roots grow deep into the ground searching for foundations to damage.

In reality, most tree roots are relatively shallow, with the majority found within the top metre of soil. Roots naturally grow towards areas where moisture, oxygen and nutrients are available.

Foundations themselves are not attractive to roots. Trees do not actively seek out buildings or concrete structures. Problems usually arise because of changes in soil conditions rather than roots physically attacking foundations.

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How Trees Can Affect Foundations

The most common issue involving trees and buildings in the UK is not direct root damage but subsidence.

Subsidence occurs when clay-rich soils shrink due to moisture loss. During dry periods, large trees can extract significant amounts of water from the soil. In certain circumstances, this can cause the ground beneath foundations to move slightly.

This is more likely where:

• The property is built on shrinkable clay soils
• Large, mature trees are growing close to the building
• Foundations are relatively shallow
• Extended dry weather occurs

It’s important to note that subsidence is relatively uncommon and usually involves a combination of factors rather than simply the presence of a tree.

Signs That May Indicate a Problem

If tree roots are contributing to movement around a property, you may notice:

• Cracks appearing in walls
• Doors or windows sticking
• Uneven floors
• Gaps around window frames
• Cracks that widen over time

However, these signs do not automatically mean a tree is responsible. Buildings naturally move over time, and similar symptoms can be caused by drainage issues, construction defects or normal settlement.

Professional investigation is always recommended before assuming a tree is the cause.

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Can Roots Physically Damage Foundations?

In most cases, healthy roots do not have the strength to break through properly constructed foundations.

What roots can do is exploit existing weaknesses. If foundations, retaining walls or underground structures already have cracks, roots may grow into these spaces over time and make existing issues worse.

This is far less common than many people believe and is rarely the primary cause of structural damage.

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What About Drains?

Tree roots are often more likely to affect drains than foundations.

Roots are naturally attracted to moisture. If a drain has a crack, failed joint or damaged section, roots can enter the system and gradually create blockages or further damage.

This is one reason why CCTV drain surveys are often carried out when investigating potential root-related issues around properties.

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Should You Remove a Tree Near Your House?

Not necessarily.

Removing a mature tree purely because it is close to a property is often unnecessary. Trees provide significant benefits, including:

• Shade and cooling
• Wildlife habitat
• Improved appearance
• Increased biodiversity
• Environmental benefits

In many cases, monitoring, pruning or professional management is a better solution than removal.

Every situation is different, which is why professional advice is so important.

The Importance of Professional Assessment

If you’re concerned about a tree growing near your property, the best approach is to seek expert advice rather than making assumptions.

At DTG Trees & Grounds, we regularly assess trees near homes, commercial buildings and developments across Devon.

We can help determine:

• Whether a tree presents a genuine risk
• The likely cause of any visible issues
• Whether management or pruning is appropriate
• When further investigation may be needed

The goal is always to provide practical, evidence-based recommendations rather than unnecessary work.

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Don’t Panic, Get the Facts

The presence of tree roots near a building does not automatically mean there is a problem. While trees can contribute to foundation issues under certain conditions, many concerns turn out to be less serious than first feared.

A professional inspection can provide clarity, peace of mind and the information needed to make the right decision for both your property and your trees.

If you’re worried about a tree growing close to your home or commercial premises, our team is always happy to help with expert advice and professional assessments across Devon.