Last updated on March 31st, 2022
Cost to prevent flood damage
Protecting your property from flood damage is something you as a homeowner should consider – especially if you live in a high flood area. That said, it can be hard to know which preventative measure to prioritise and what the overall costs entail, which is why we’ve put together this flood damage cost guide. Read on as we take a deep dive (pardon the pun) into the average costs for preventing various types of flood damage.
Britain is notorious for its wet and windy weather. Flood damage costs the UK around £2.2 billion every year to manage and prevent flooding, with £800 million spent on flood and coastal defences. This figure rises when floods are particularly bad, with the 2015 and 2016 floods costing the UK around £1.6 billion to manage alone.
With this in mind, protecting your property from flood damage is something you as a homeowner should consider – especially if you live in a high flood area. That said, it can be hard to know which preventative measure to prioritise and what the overall costs entail, which is why we’ve put together this flood damage cost guide.
Read on as we take a deep dive (pardon the pun) into the average costs for preventing various types of flood damage.
Common types of flood damage
|Preventative measure||Unit||Average cost|
|Sandbags and floor barriers||Per item||£100|
|Toilet pan seals||Per item||£45|
|Airbrick covers||Per item||£30|
|Raising door thresholds and plug sockets||Labour per hour||£80|
|Basement waterproofing||Per m2||£120|
|uPVC door replacement||Per door||£450|
|uPVC window replacement||Per window||£400|
|Water resistant skirting board||Per m2||£80|
|Gutter cleaning||Per metre||£4|
|Soakaway installation||Per unit||£850|
|Damp proof course||Per house||£850|
|Damp proofing||Per metre||£60|
Our costs are ballpark averages – get a local tradesperson to quote now
There are 6 common types of flooding in the UK, which include:
- Surface or pluvial water
For homeowners, groundwater flooding is the most common type of storm damage to hit their houses, which is caused by an increase in rainwater.
When this happens, homes are susceptible to flood damage such as:
- Basement flooding
- Garden flooding
- Sewage overflows
- Shed contamination
- Flood-damaged cars
Average flood prevention costs
There are several preventative measures you can employ to help limit the amount of damage caused by UK flooding. Read on for the best solutions and their average costs.
Sandbags or flood-barriers
Sandbags and flood barriers are a simple but effective way to prevent or reduce floodwater entering your home. Although they’re not a 100% guarantee, they’re useful for redirecting water away so it doesn’t overwhelm your property. For simple defences placed outside your front door, costs are as low as £24. However, for more robust options, which are especially useful for those who live by the sea, costs can rise to £180.
Average cost: £100
Toilet pan seals
Toilet pan seals are a great anti-flooding device that you secure around your toilet pan rim to prevent backflow from contaminated wastewater. They’re worth keeping in your floor-defence arsenal in the event of sewage overflows. Costs start at around £34 and rise to £60 depending on the make and model.
Average cost: £45
Only use airbrick covers in an emergency situation to prevent floodwater seeping under your floorboards. As soon as the flood subsides, remove them to allow air circulation that helps dry out damp conditions. Due to these covers being a relatively simple option, costs start at £12 and increase to £50 for more hardcore options.
Average cost: £30
Raising door thresholds and plug sockets
There are various flood barrier threshold kits on the market, which can be used in advance of a flood or installed preventatively as defence doors. Either way, raising your door thresholds where possible is good practice. And the same goes for plug sockets on your lower ground floors, resulting in a lower chance of electrical hazards.
The average costs for these measures vary, so it’s worth seeking a professional quote from a handyman, electrician or carpenter. Their average hourly rates cost around £80.
Check out our handyman prices, carpenter prices, and electrician prices for more comprehensive rates.
Average hourly rate: £80
When it comes to flooding, basements are the hardest-hit areas in your house, which is why investing in basement waterproofing (aka: structural waterproofing) is a great way to prevent groundwater causing significant damage to your property. Costs will depend on your square footage and type of waterproofing, but you can expect to pay between £40 and £250 per m2.
Check out our basement waterproofing cost guide for more information.
Average cost: £120 per m2
Swapping doors and windows for uPVC alternatives
uPVC doors and windows are solid, low maintenance and waterproof alternatives to their material counterparts, and we recommend replacing your front door and windows with uPVC alternatives as a flood defence priority – particularly if you live in a high-risk area. Costs will depend on the style of doors and windows you’re looking for and how many need replacing.
Check out our door replacement cost guide and our window replacement guide for more information.
Average cost of uPVC front door replacement: £450
Average cost of uPVC window replacement: £400 per window
Water-resistant skirting boards
Skirting boards aren’t just decorative items. When sealed properly, uPVC boards act as a barrier that prevents floodwater seeping through your walls. For a 3m x 3m room, costs range between £250 and £350. However, the final cost will depend on the amount of sealant and labour required.
Check out our skirting board cost guide for more information.
Average cost of uPVC skirting board: £80 per m2
Clogged gutters and flood conditions are a terrible combination. Not only does it cause mould, structural issues and potential pest infestations, but it also exacerbates flood issues by blocking runoff and letting floodwater continue to build up. This wreaks havoc on your home, which is easily avoided by regular gutter maintenance.
Check out our gutter cleaning cost guide for more information.
Average cleaning cost per metre: £4
Installing a soakaway is a great way to prevent floods reaching your home. Perfect for catching runoff and storm water, soakaways are built underground and covered in a porous-walled chamber that catches floodwater before it causes damage. Depending on the materials used, the depth of the structure, and where it’s being installed, you can expect to pay between £700 and £1000 for a soakaway installation.
For more information on installing drainage friendly front gardens, check out our permeable driveway cost guide.
Average cost: £850
Damp-proofing and damp proof floor membrane maintenance
Damp is a major nuisance for a homeowner, which is why maintaining or installing a damp proof course and making sure you damp proof your home is essential for avoiding a long-lasting headache. Maintaining your damp proof floor membranes (especially if you don’t have underfloor heating) is also essential for validating your insurance.
Check out our damp proofing cost guide for more comprehensive information on all types of damp and damp prevention measures.
Average cost for a damp proof course: £850
Average damp proofing cost per metre: £60
Other helpful links for flood damage costs
In the event of your worst-case scenario, it’s helpful to know the potential cost of flood damage repairs. Here is a helpful list for you to browse.
- Water removal cost guide
- Cost of home emergency cover
- Drain repair cost guide
- Dehumidifier hire cost guide
- Property maintenance cost guide
- Carpet replacement cost guide
- Car service cost guide
- Mould removal cost guide
- Carpet cleaning cost guide
- Fascia, soffit and guttering replacement cost
- Identify your flood defence requirements and prioritise your preventative measures
- Tackle external measures first, such as your front door, windows and garden
- Remember that prevention is better than cure. Hire a professional to tackle more complex jobs and ensure your peace of mind
For more helpful guides like this, head over to Checkatrade’s blog for all the latest insights, inspiration and costs on hundreds of relevant topics.