Technical inspection of a house foundation
Foundation problems are a hidden, expensive risk in older Dutch homes — and sellers often don't mention them. A foundation-focused technical inspection reveals the real state of the foundation before you buy. Here's what's checked and why it matters in 2026.
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Foundation problems are one of the biggest hidden risks when buying an older Dutch home — and one sellers often don't mention. A technical inspection focused on the foundation reveals the real condition of the base the whole house rests on, so you don't move in only to be confronted with a repair bill that can run into tens of thousands of euros. This matters more than ever: foundation issues are expected to affect a large and growing share of Dutch housing in the years ahead.
Why foundation problems are a 2026 concern
Foundation damage in the Netherlands is widespread and increasing. Estimates point to roughly 425,000 buildings at short-term risk of foundation damage, rising toward around 800,000 by 2050 — driven largely by lower groundwater levels, drought, and ageing wooden pile foundations in older homes. In response, the government launched a national approach to foundation problems, and a national foundation desk (Nationaal Funderingsloket) now offers homeowners, buyers and agents advice on inspection, repair and costs.
The takeaway for buyers: don't assume a house is fine just because nothing looks wrong. Foundation damage is often invisible until it's serious.
Foundation problems affect nearly half a million homes — what changes in 2026
Read our overview of the scale of the problem and the new national measures (Dutch).
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Why inspect the foundation?
When buying or selling, it's crucial to assess the property's structural condition thoroughly — and the foundation is the most important part of that assessment. Since the entire house rests on it, problems here have the biggest cost consequences of anything an inspection can find — and they weigh heavily on the home's property valuation too.
A thorough foundation inspection gives insight into the stability and integrity of the building, providing both buyers and sellers with the information they need for an informed decision. Alongside the foundation, there are many other parts of the house worth checking — which is why this is part of a full technical inspection.
What a foundation inspection involves
During a foundation inspection, an experienced inspector carries out:
- A detailed assessment of the foundation system
- Visual inspection of accessible areas, including the crawl space
- Measurements (for example, of differences in floor level)
- A review of construction drawings and available documentation
- A check for warning signs such as cracks in walls or floors, subsidence, and moisture
- For homes with wooden pile foundations, an assessment of the risk of pile rot
A standard technical inspection is non-invasive and visual. If it flags possible foundation trouble, a specialist foundation inspection — sometimes including an inspection pit (proefsleuf) to expose and examine the piles — gives a definitive answer. A specialist foundation investigation typically costs more than a standard inspection; the standard technical inspection itself runs roughly €350 to €600.
Benefits of a foundation inspection
Early detection
Catching foundation problems early can prevent — or at least control — repairs that would otherwise be far more costly.
Negotiating power
For buyers, a clear picture of the foundation's condition is a strong basis for negotiating the purchase price, or for walking away.
Sales preparation
For sellers, a positive inspection reassures buyers and helps the sale go through smoothly.
Risk management
Both parties understand the potential risks up front and avoid financial surprises later.
Long-term confidence
A solid foundation is essential to a house's lifespan. A good inspection gives lasting peace of mind.
In short, a foundation inspection is a valuable tool for judging the structural integrity and stability of a property. It gives buyers and sellers the information they need to make informed decisions and contributes to a smooth transaction with minimal surprises.
Frequently asked questions
Very. Roughly 425,000 buildings are estimated to be at short-term risk of foundation damage, growing toward around 800,000 by 2050, largely due to low groundwater levels and ageing wooden pile foundations. It's a leading hidden risk in older homes.
A standard inspection visually checks for warning signs of foundation trouble but doesn't excavate. If concerns arise, you arrange a specialist foundation inspection separately for a definitive assessment.
Older homes — especially pre-1970 properties on wooden pile foundations, and houses in subsidence-prone or low-groundwater areas. If you're buying one, a foundation check is well worth it.
The national foundation desk (Nationaal Funderingsloket) and the KCAF knowledge centre offer homeowners and buyers advice on inspection, repair and costs.