Build-Over Survey in Oxford
Building over or within 3 metres of a public sewer? Your water company needs a CCTV condition survey before it will grant a build-over agreement.
Free · No obligation · Under 2 minutes
In short
Building over or within 3 metres of a public sewer? Your water company needs a CCTV condition survey before it will grant a build-over agreement. We match you with up to 3 verified local specialists in Oxford — a shortlist, not the whole market, so you compare quotes without being bombarded. Local specialists know Oxford's drainage and deal with Thames Water regularly.
Local to Oxford
What drainage in Oxford actually looks like
Your water company
Thames Water serves Oxfordshire and the Thames Valley. It's responsible for public sewers and the lateral drains beyond your boundary — including build-over agreements.
Who's responsible? →Local ground conditions
Oxford sits on clay-influenced ground — often poor for soakaways and a higher risk for subsidence and root ingress. A percolation test decides.
Soakaway rules & costs →Local housing age
Oxford has a high share of Victorian and Edwardian terraces. Older clay drains here are prone to cracks, displaced joints and root ingress — what a CCTV survey pinpoints.
Why drains keep blocking →When to book
Blockages spike in December–January as festive fat and wipes hit the sewers (Water UK). Autumn is the best time to survey — before winter rainfall raises the risk of flooding and backing up.
Drainage questions in Oxford
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