Illustrative image of the relevant drainage feature or investigation.
Need a local drainage specialist?
If investigation or repairs are needed, you can use MyJobQuote to request contact from local drainage tradespeople.
Get quotes from local drainage specialists ↗Why it happens
Poor backfill compaction, ground washout or leaking joints can contribute to local settlement. Look for a linear depression or a sunken area above a known pipe run.
Older homes can have clayware pipes, later plastic repairs and altered connections in the same drainage run. A defect at one joint does not necessarily describe the rest of the system.
Useful evidence to collect
Look for a linear depression or a sunken area above a known pipe run. Where safe, take dated photographs and note which appliances still work normally. Never enter a chamber or work around foul water without appropriate training and protection.
What repair is proportionate?
A specialist can locate the drain and investigate the cause before repaving. Settlement may reflect paving construction rather than drainage damage. A sensible recommendation should match the defect found and explain why a smaller repair would not be enough.
Before you agree to major work
Get the proposed work and its limits in writing. For costly repairs, ask for photographs or survey evidence locating the defect and consider a second quotation. Where the affected run may be shared or adopted, check ownership before arranging privately funded work.