Where flood risk applies in Oxford
The council's Level 1 Strategic Flood Risk Assessment (January 2026) sets out where the city is at risk:
- Botley, Osney and the westNew Botley and Osney are at risk from the main branch of the Thames, with many properties in Flood Zone 3. The watercourses west of the Thames put many properties along the Botley Road in Flood Zone 3.
- New Hinksey and the southBelow the city centre the Cherwell adds a large flow to the Thames, which poses a significant flood risk to New Hinksey. Hinksey Stream also poses a significant risk, and has caused widespread flooding west of New Hinksey in the past.
- The CherwellThe Cherwell's floodplain between Marston and Summertown is mostly farmland and recreational land, though property in New Marston is affected in larger floods.
- GroundwaterWhere the floodplains of the Thames and Cherwell sit on floodplain soils with naturally high groundwater, such as New Hinksey, New Botley and Osney, the SFRA rates groundwater flood risk as high.
What Oxford City Council will look for
Oxford City Council applies the national tests in NPPF Chapter 18 and the Planning Practice Guidance, supported by its Strategic Flood Risk Assessment. A Sequential Test submitted with a Oxford application should normally:
- Confirm the flood zone and vulnerabilityUse the current Environment Agency Flood Map for Planning and the NPPF Annex F vulnerability class for the proposed use.
- Justify the area of searchNational policy says the area of search should reflect the catchment for the type of development and the need it serves. Oxford is a compact city, so the whole city is often a reasonable area of search; for a smaller scheme serving a particular neighbourhood, a narrower area may be more defensible.
- Assess the council's own sources of sitesOxford's Strategic Housing Land Availability Assessment (June 2026), the Oxford Local Plan 2036 allocations, the proposed Oxford Local Plan 2045 allocations and the Brownfield Land Register are the obvious places to start, and omitting them is a common reason for challenge.
- Evidence every discounted siteWhere an alternative is ruled out as unsuitable, too small or not available in a similar timeframe, give the reason and the evidence. Ownership alone is not enough.
- Screen for the Exception TestState whether the Exception Test applies under Annex F Table 3, and if it does, provide it, drawing on the site-specific flood risk assessment.
Oxford-specific pitfalls
- Climate changeWith climate change the SFRA shows significant increases in flood extent in places such as Jericho, around the railway station, Thames Street and Grandpont. A site outside today's flood zones may be inside them for the lifetime of the development.
- The emerging Local PlanThe Oxford Local Plan 2045 is at examination, with hearings from October 2026. Its proposed allocations are included in our reports, but designations such as Green Belt still apply to them until the plan is adopted.
- Small sitesOxford's land availability assessment sets out delivery timescales for sites of 10 or more homes. For smaller schemes, local alternatives such as small brownfield sites may need to be added.
- Housing-led evidence for non-housing usesOxford's land availability evidence is housing-focused. For employment, retail or community uses, you may need to add alternative sites from other sources.
Fixed-fee Sequential Tests for Oxford
We have built our Oxford Sequential Test on published Environment Agency and Oxford City Council data. Plot your site on our Oxford Sequential Test page and we'll deliver a submission-ready report within 24 hours of payment for £300. Exception Tests are £450 within 48 hours.
New to the subject? Start with our general guide: what is a flood risk Sequential Test? We also cover other council areas at the same fixed fee. For wider planning help, see planning consultants in Oxford.
Source: Oxford City Level 1 Strategic Flood Risk Assessment (Wallingford HydroSolutions, January 2026).
Sequential Test guides for other council areas
Runnymede · Spelthorne · Dover · Medway · Lewes District · Bristol · Manchester · Birmingham · Chelmsford · Gateshead · Tameside · East Riding of Yorkshire · Wigan · York · Plymouth · Lichfield · Hull · Northumberland
Frequently asked questions
Does Oxford City Council require a Sequential Test?
Yes, for most development in Flood Zones 2 and 3, in line with national policy. Some minor development and most changes of use are exempt, and sites allocated in the local plan may not need the test repeated.
What area of search should I use in Oxford?
National policy says the area of search should reflect the catchment for the type of development and the need it serves. Oxford is a compact city, so the whole city is often a reasonable area of search; for a smaller scheme serving a particular neighbourhood, a narrower area may be more defensible. The reason must be explained in the report.
Do flood defences mean I don't need a Sequential Test?
No. Flood zones for the Sequential Test are assessed without defences. Defences are taken into account in the site-specific flood risk assessment and the Exception Test, not the Sequential Test.
How much does a Sequential Test cost in Oxford?
Our fixed fee for a Oxford flood risk Sequential Test or alternatives assessment is £300, delivered within 24 hours of payment. An Exception Test is £450, delivered within 48 hours.
This guide is general information for applications in England and is not advice on your specific project. Requirements differ in Wales, Scotland and Northern Ireland, and every council publishes its own local validation list, so always check the detail with your local planning authority.