Flood risk in Bristol, district by district
Across the 13 Bristol postcode districts with a guide, 15 of the 116 postcodes we checked are in a mapped river or sea flood area (in BS1, BS2, BS6, BS11 and BS13).
Surface water flood risk, from heavy rain, is medium or high at 22 of the 116 postcodes we checked (in BS1, BS2, BS3, BS4, BS5, BS6, BS7, BS8, BS11, BS13 and BS14).
From Environment Agency, SEPA and Natural Resources Wales flood maps, checked at the sampled postcodes of each district guide in October 2026. Facts with their sources, not a rating: a district with nothing found isn't safe, and one with findings isn't unsafe. The maps describe the ground, not any home.
Check a postcode in Bristol
Free, from the official flood maps for England, Scotland and Wales. No account needed.
District by district
Sampled: the centre of 7 to 9 postcodes in each district
| District | Rivers and sea | Surface water (medium or high) |
|---|---|---|
| BS1 | 7 of 12 postcodes (Flood Zone 3, Flood Zone 2) | 2 of 12 postcodes |
| BS2 | 4 of 12 postcodes (Flood Zone 3, Flood Zone 2) | 3 of 12 postcodes |
| BS3 | None of 8 postcodes | 3 of 8 postcodes |
| BS4 | None of 8 postcodes | 1 of 8 postcodes |
| BS5 | None of 8 postcodes | 2 of 8 postcodes |
| BS6 | 1 of 8 postcodes (Flood Zone 2) | 2 of 8 postcodes |
| BS7 | None of 8 postcodes | 1 of 8 postcodes |
| BS8 | None of 8 postcodes | 1 of 8 postcodes |
| BS9 | None of 12 postcodes | 0 of 12 postcodes |
| BS10 | None of 8 postcodes | 0 of 8 postcodes |
| BS11 | 2 of 8 postcodes (Flood Zone 2) | 2 of 8 postcodes |
| BS13 | 1 of 8 postcodes (Flood Zone 3) | 3 of 8 postcodes |
| BS14 | None of 8 postcodes | 2 of 8 postcodes |
Each district guide checks 7 to 9 postcodes spread across the district. "2 of 8 postcodes" means the finding was at two of those centres, not at a quarter of homes. Open a district for its own guide, with every postcode listed.
What it means when you buy in Bristol
Look the postcode up on the official flood map for its country. In England, the flood zone is the chance of flooding from rivers or the sea in any year, ignoring flood defences:
- Flood Zone 1: less than 1 in 1,000.
- Flood Zone 2: between 1 in 1,000 and 1 in 100 from rivers, or 1 in 200 from the sea.
- Flood Zone 3: 1 in 100 or more from rivers, or 1 in 200 or more from the sea.
- Surface water from heavy rain is mapped separately and affects many homes away from rivers and the sea. Scotland and Wales use their own maps and bands.
- Whether the area has flooded before: in England, the Environment Agency records the outlines of past floods.
Flood risk can affect what insurance costs, whether a lender is comfortable, and what the home is worth when you come to sell. Finding out before you offer means you can ask questions while you can still walk away cheaply.
Flood maps are models, not promises. A low-risk area can still flood, and a higher-risk one may have defences. The maps tell you where to ask more questions.
Use the postcode check to decide whether to look closer, then check the house before you offer.
Questions to ask about a home in Bristol
- Has the house, the garden or the access road flooded while the seller has owned it?
- Has a flood insurance claim ever been made, and what does buildings insurance cost now, with flood cover?
- Does the home have flood protection, such as flood doors or air-brick covers, and who maintains it?
- What does the environmental search say, and does it agree with the maps?
The full report checks the house itself, not the postcode, and ties each question to what it found. See an example report.