The flood insurance problem
Flooding is one of the most expensive natural hazards faced by UK homeowners. A single flood event can cause tens of thousands of pounds in damage, and properties in flood-prone areas face the risk of repeated flooding over their lifetime. For insurers, this makes flood risk one of the most significant factors in pricing home insurance, and for some properties, it has historically made affordable cover difficult or impossible to obtain.
The challenge is straightforward: insurers assess risk using detailed flood mapping data, and properties identified as being at significant flood risk face substantially higher premiums. In the most extreme cases, some insurers have declined to offer cover altogether, leaving homeowners unable to meet their mortgage lender's insurance requirements or exposed to potentially catastrophic uninsured losses.
How flood risk is assessed
Insurers use data from the Environment Agency (in England), Natural Resources Wales, and SEPA (in Scotland) to assess flood risk at a property level. This data considers several types of flooding: river flooding (from rivers and watercourses overflowing), surface water flooding (from heavy rainfall overwhelming drainage systems), coastal flooding (from tidal surges and rising sea levels), and groundwater flooding (from rising water tables).
The risk assessment considers not just whether flooding has occurred in the past, but the probability of it occurring in the future. Properties are typically classified into risk bands based on the estimated probability of flooding in any given year. A property with a 1-in-30 annual probability of flooding is considered high risk, while one with a 1-in-1,000 probability is considered low risk.
You can check the flood risk for any property in England using the Environment Agency's online flood risk service, which is freely available and provides detailed information about the types and levels of flood risk affecting a specific location.
Flood Re: the government-backed scheme
Flood Re is a joint initiative between the UK government and the insurance industry, launched in 2016 to address the problem of unaffordable flood insurance. It works as a reinsurance scheme — insurers can pass the flood risk element of a home insurance policy to Flood Re, which takes on the liability in exchange for a fixed premium based on the property's council tax band rather than its actual flood risk.
This means that even properties in the highest flood risk areas can access home insurance at a price linked to their council tax band rather than their flood risk. For council tax bands A to H, the Flood Re premiums range from £46 to £390 per year. This is added to the insurer's premium for all other risks (fire, theft, etc.), but it caps the flood element at an affordable level.
Who qualifies for Flood Re?
Flood Re is available for residential properties built before 1 January 2009. Properties built after this date are excluded because the government's position is that new developments should not be built in flood risk areas, and developers should incorporate adequate flood resilience measures. The scheme covers owner-occupied homes and some tenanted properties but does not cover commercial properties, buy-to-let landlord policies, or properties with more than a certain number of units (typically four or more flats).
Not all insurers participate in Flood Re, though the majority of major UK home insurers do. If your current insurer does not participate, switching to one that does could significantly reduce your premium if you are in a flood risk area.
What to expect on costs
For properties that qualify for Flood Re, the total home insurance premium will include the capped flood element plus the standard premium for all other risks. The total cost is typically comparable to what a homeowner in a non-flood-risk area would pay, making it genuinely affordable.
For properties that do not qualify for Flood Re — those built after 2009, commercial properties, or buy-to-let properties — flood risk can significantly increase premiums. In high-risk areas, the flood element of the premium alone can run into thousands of pounds, and some properties may struggle to find cover from mainstream insurers at all.
In these cases, specialist insurance brokers who work with non-standard insurers and Lloyd's syndicates can often find cover, though it may come at a higher cost. The expertise of the broker in this niche market can make a substantial difference to both the availability and cost of cover.
Reducing your flood risk
There are practical steps you can take to reduce the flood risk to your property, which may in turn help reduce your insurance premiums. Installing flood barriers or flood doors can prevent water entering the property during a flood event. Raising electrical sockets and wiring above likely flood levels reduces the cost of reinstatement after a flood. Using flood-resilient materials for ground-floor walls and floors means the property can be dried out and reoccupied more quickly after flooding.
Some insurers offer premium reductions for properties that have implemented recognised flood resilience measures. A specialist broker can advise on which measures are most likely to reduce your premium and which insurers recognise them.
What to do if you have been flooded
If your property has been flooded previously, you must declare this when applying for home insurance. Failing to disclose a previous flood could invalidate your policy entirely. While a flood history makes insurance more expensive, it does not make it impossible — Flood Re was specifically designed to help homeowners with flood-affected properties.
After a flood, your insurer should arrange for professional drying, repair, and reinstatement of your property. This process can take several months, particularly for severe flooding. Your policy should cover temporary alternative accommodation during this period. If you are unhappy with how your claim is handled, the Financial Ombudsman Service can investigate complaints against regulated insurers.
Finding flood risk home insurance
An experienced insurance broker is the best route to affordable flood risk cover. Brokers who specialise in non-standard or high-risk properties know which insurers participate in Flood Re, which specialist markets offer competitive terms for excluded properties, and how to present your risk profile to achieve the best possible premium. Nesto matches you with experienced home insurance brokers who can navigate the flood insurance market on your behalf. The service is free.