Flood Risk In Scotland: How SEPA Maps Flood Risk And What It Means For Property

Scotland has its own flood risk system. SEPA's likelihoods use different thresholds from the rest of Great Britain, planning follows National Planning Framework 4, and warnings come through SEPA's Floodline. This page explains how SEPA classifies flood risk, who is responsible, how to check an address, and what flood risk means for planning and insurance in Scotland.

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How Is Flood Risk Classified In Scotland?

Flood risk in Scotland is classified by SEPA into three likelihoods of flooding each year: high, medium and low. The same three likelihoods are mapped for rivers, the sea and surface water, with separate maps showing how climate change is expected to extend them.

SEPA's definitions are:

A high likelihood describes how often flooding is expected, not how bad it will be. SEPA's flood hazard maps were last updated in February 2025. SEPA also stresses that "Being in a flood risk area does NOT mean that your property will be impacted if there is flooding": the impact varies with land surfaces, buildings and property defences.

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Who Is Responsible For Flood Risk In Scotland?

In Scotland, SEPA is Scotland's national flood forecasting, flood warning and strategic flood risk management authority, while local authorities build and maintain flood protection and Scottish Water drains public sewers. Property owners remain responsible for their own homes: SEPA states that "It is your responsibility to manage your own flood risk."

The main roles are:

Flood risk management is planned across 14 Local Plan Districts, each with its own SEPA plan and local authority plan, renewed every six years.

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How Do You Check Flood Risk In Scotland?

The flood risk of a Scottish address is shown on SEPA's flood maps, searchable by postcode, and in the checker on this site alongside the rest of the UK. SEPA's maps show areas that may be affected by flooding from rivers, the sea and surface water now and in the future due to climate change.

The official services are:

1. Check an area's long term flood risk — SEPA's flood map viewer, by postcode or map.
2. Floodline — free flood messages. If your property is within an area covered by a SEPA flood monitoring system, you will be able to sign up to receive a targeted Flood Warning message for your local area; otherwise you receive a more general Flood Alert message for the wider geographical area, usually representing Local Authority boundaries. You can also call Floodline on 0345 988 1188 and select option 2 for Scotland.
3. Live flooding information and water level data — SEPA's current flood updates and river levels.

Two limits apply. First, SEPA has assessed flood risk to areas within Scotland, not the flood risk to individual properties. Second, where the maps show no flooding, SEPA says "this does not confirm there is no risk"; sources not modelled include sewer systems and the effects of wave action in most locations.

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How Does Scotland's System Compare With The Rest Of The UK?

Scotland differs from England and Wales in two ways: its high likelihood starts at 10% a year rather than 3.3%, and its planning system has no zones, relying instead on a single "at risk of flooding" test that includes climate change. The English term for zones appears only in the comparison below.

The four systems are compared below.

Scotland's planning test is closest to the English Flood Zone 3 threshold for the sea (0.5%), but it applies to every source and always includes an allowance for climate change, so the two are not interchangeable. Property counts are not directly comparable, because each agency counts differently. Each system is explained on flood risk in England, flood risk in Wales and flood risk in Northern Ireland.

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Which Areas Of Scotland Have The Highest Flood Risk?

The towns and cities in Scotland with more than a quarter of their homes in SEPA's high or medium likelihood areas. Across Scotland, climate change is expected to add an additional 110,000 homes, businesses and services to the 284,000 homes, businesses and services at risk today.

SEPA projects a 90% increase in the number of properties at risk of coastal flooding, 40% increase in the number at risk for river flooding and 25% for surface water flooding, so the steepest proportional rise is in coastal flooding. The Scottish places with the highest share of homes at risk are listed below.

1. Dumbarton flood risk High 20.9% of homes at Medium or High no separate surface water figure
2. Kilbirnie flood risk Medium 19.6% of homes at Medium or High no separate surface water figure
3. Musselburgh flood risk Medium 14.6% of homes at Medium or High no separate surface water figure
4. Stonehaven flood risk Medium 13.8% of homes at Medium or High no separate surface water figure
5. Grangemouth flood risk High 13.2% of homes at Medium or High no separate surface water figure
6. Galashiels flood risk Medium 11.8% of homes at Medium or High no separate surface water figure
7. Hawick flood risk Medium 10.1% of homes at Medium or High no separate surface water figure
8. Peebles flood risk Medium 8.9% of homes at Medium or High no separate surface water figure
9. Troon flood risk Medium 7.9% of homes at Medium or High no separate surface water figure
10. Stranraer flood risk Medium 7.3% of homes at Medium or High no separate surface water figure
11. Oban flood risk Medium 6.8% of homes at Medium or High no separate surface water figure
12. Balloch and Haldane flood risk Medium 6.4% of homes at Medium or High no separate surface water figure
13. Giffnock flood risk High 5.9% of homes at Medium or High no separate surface water figure
14. Renfrew flood risk Low 5.9% of homes at Medium or High no separate surface water figure
15. Stirling flood risk Medium 5.9% of homes at Medium or High no separate surface water figure

Counties in Scotland

1. flood risk in Cambridgeshire 5 districts ranked · 6% of homes at Medium or High
2. flood risk in Derbyshire 8 districts ranked · 1.1% of homes at Medium or High
3. flood risk in Devon 8 districts ranked · 3.8% of homes at Medium or High
4. flood risk in East Sussex 5 districts ranked · 1.8% of homes at Medium or High
5. flood risk in Essex 12 districts ranked · 1.1% of homes at Medium or High
6. flood risk in Gloucestershire 6 districts ranked · 2.3% of homes at Medium or High
7. flood risk in Hampshire 11 districts ranked · 1.2% of homes at Medium or High
8. flood risk in Hertfordshire 10 districts ranked · 0.9% of homes at Medium or High
9. flood risk in Kent 12 districts ranked · 2.2% of homes at Medium or High
10. flood risk in Lancashire 12 districts ranked · 2.5% of homes at Medium or High

Groundwater is mapped differently: SEPA notes that "In Scotland groundwater is usually a contributing factor to flooding rather than the primary source," and maps where it can contribute to flood risk.

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What Does Flood Risk Mean For Planning In Scotland?

In Scotland, flood risk in planning is governed by Policy 22 of National Planning Framework 4. Land "at risk of flooding" means an annual probability of being flooded of greater than 0.5% which must include an appropriate allowance for future climate change, and the Chief Planner's letter of 13 October 2025 explains how the policy is applied.

Three points decide most applications:

1. The threshold. A 0.5% annual chance sounds small, but over a building's life it adds up: a 20% likelihood of flooding at least once over 45 years, and nearly a 40% likelihood of flooding at least once over 100 years.
2. Assessment. The letter states that for most applications in or near flood risk areas, a site-specific flood risk assessment is needed.
3. SEPA consultation. SEPA is consulted where development is likely to result in a material increase in the number of buildings at risk of being damaged by flooding, unless SEPA's standing advice lets the council decide without it.

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What Does Flood Risk Mean For Insurance In Scotland?

Flood cover in Scotland is part of standard home insurance, and Flood Re covers Scotland on the same terms as the rest of the UK for eligible homes built before 1 January 2009. SEPA does not set premiums: "Insurance companies have their own processes for assessing flood risk when setting premiums."

SEPA's maps are published available under Open Government Licence (OGL), so insurers may use them, but SEPA notes they have not been explicitly designed for this purpose as they represent the risk of flooding to an area, rather than to individual property. Specialist providers for homes that standard insurers will not cover are listed in the BIBA and ABI Flood Insurance Directory, on 0370 950 1790. How premiums, excesses and refused cover work is explained in flood insurance, and the scheme's rules in Flood Re.

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Sources (Verified 16 Sep 2026)