Are sewage pipes covered by building insurance in Germany?
In short
Sewage pipes inside the house are covered by building insurance in Germany if they break or water escapes. Outside the building, the model conditions only cover supply pipes, so sewage pipes in the garden and under the floor slab need an add on. A blockage alone is not an insured event. A mains water claim costs around EUR 4,300 on average.
Published averages for water claims in Germany and typical costs around sewage pipes.
Example
Typical range
Average mains water claim on residential buildings
around EUR 4,300
Leak detection, depending on method
about EUR 200 to 600
Camera inspection of the house connection
about EUR 150 to 400
Digging up and replacing a garden drain, per metre
about EUR 300 to 800
Average claim and leak detection from the sources listed, as of October 2026.
Camera inspection and pipe replacement are guide values from our quoting practice and depend on
depth, surface and access.
Worked example
House built in 1972, sewage pipe broken under the drive
The cellar smells, and the camera shows a break eight metres from the house. The policy has no waste pipe add on.
Camera inspection
about EUR 250
Dig up and replace 8 metres
about EUR 2,400 to 6,400
Relaying the drive paving
extra, depending on area
Building insurance without add on
EUR 0
The owner pays everything. With the waste pipe add on, the break would have been covered up to the agreed limit.
Sewage pipes inside the house: what the model conditions say
Under A 4.2 of the GDV model conditions VGB 2022, mains water (Leitungswasser) is water escaping from water supply pipes, expressly including supply and waste pipes. A 4.3 covers breaks in these pipes inside buildings, frost included. If the waste pipe in the wall bursts, building insurance pays the pipe and the wet walls.
Inside the building means the whole structure including the floor slab. Pipes below the floor slab are not covered under the model conditions unless agreed otherwise. That is exactly where many houses have their main drains.
Outside the house: the most common gap
For pipes outside buildings, A 4.4 of the model conditions only covers water supply pipes and heating or air conditioning pipes. Waste pipes, the drain from the house to the public sewer, are not mentioned.
Many policies offer waste pipes on the property as an add on, often with a separate limit per claim. Without it, you pay for digging, replacing the pipe and restoring the drive yourself.
Where the sewage pipe runs
Covered under model conditions
What you need
In wall, ceiling or screed
yes, break and leak
mains water in basic cover
In the floor slab
yes, counts as inside
mains water in basic cover
Below the floor slab
no, unless agreed
add on for pipes below the slab
In the garden up to the boundary
no
waste pipe add on
Public sewer under the street
no
the municipality's matter
Blockages, roots and backflow
Building insurance pays for breaks and escaped water. A plain blockage without a break and without water damage is neither. Drain cleaning and camera inspection are therefore at your own cost unless your policy has an add on for them.
If water from the sewer is pushed back into the house through the drains, that is backflow (Rückstau). Under A 5.4.2 of the model conditions it is only covered through natural hazards cover, and only if heavy rain or an overflowing river is the cause. A backflow valve is required and must work.
How to spot a good add on for waste pipes
Make sure the add on covers breaks in waste pipes on the whole insured property, not just pipes serving the building. Check the limit per claim: for a long connection under a paved drive, small limits are not enough.
Also read whether roots growing into the pipe count as a break. Each set of conditions decides this itself. In older houses with clay pipes, roots are one of the most frequent causes of damage in the garden.
When you do not need the add on
In a flat in an apartment block, the owners' association insures the building including its pipes, so you do not need the add on yourself. In a terraced house without a garden, whose connection is right at the street, the risk is also small.
For a detached house with a garden, a long drive and pipes from the 1960s or 1970s, the add on belongs in the policy. Before buying a house, have a camera inspection done so you know the state of the drains.
Step by step
Find out where your sewage pipes run: inside, below the slab or in the garden.
Search your conditions for waste pipes outside the building.
Check the limit per claim for pipes on the property.
Fit a backflow valve and have it serviced.
Before buying, order a camera inspection.
Checklist
Waste pipes on the property covered
Pipes below the floor slab included
Adequate limit per claim for outside pipes
Natural hazards cover for backflow
Backflow valve in working order
Common mistakes
Assuming mains water covers every pipe on the property
Reporting a blockage as a pipe break
Never having the backflow valve serviced
Not checking the drains when buying a house
Questions and answers
Frequently asked
Does building insurance pay for a pipe break in the garden?
For supply pipes generally yes.
For sewage pipes only if your policy includes waste pipes outside the building.
Does insurance pay for drain cleaning?
Not for a plain blockage.
If the blockage leads to a break or water damage, the consequential damage is covered.
Who pays if the sewer under the street is broken?
The public sewer belongs to the municipality.
Where your connection starts is set by its drainage bylaws.
Is backflow a mains water claim?
No.
Backflow from heavy rain or flooding is only covered by natural hazards cover (Elementarschutz).
What does the waste pipe add on cost?
Usually a small surcharge compared with the total premium.
