Flood prevention for homes in West Wales
Check your flood risk by postcode, understand the protection options that actually work, and book a free flood-risk assessment with a local design-and-build team.
- Free flood-risk assessment across Ceredigion, Carmarthenshire and Pembrokeshire
- Site drainage, barriers, tanking and pump systems under one contract
- Honest advice: we only recommend works justified by the actual risk
How to check your flood risk by postcode in Wales
The free official tools give a clear picture before you spend money on protection.
Check the NRW flood map
Use Natural Resources Wales’ long-term flood risk checker. Enter your postcode to see river, coastal, surface-water and reservoir risk for your property.
Check surface-water flooding
NRW covers large-scale risk; your local council’s surface-water map covers the smaller watercourses and highway drainage that can back up in heavy rain.
Record what you know
Note your postcode, flood zone, any past flooding, and your insurance conditions. That information lets a contractor give useful advice in the first phone call.
If you are buying or refinancing, a solicitor may flag flood risk from the environmental search. That flag does not always mean the house floods — it means the site is in an area where flooding has been recorded or modelled, and you should investigate before you exchange.
Common flood-prevention measures for homes
Flood prevention is not one product. It is a sequence: keep water away, slow it down, and limit damage if it gets in.
Site drainage & soakaways
Permeable paving, soakaway crates, swales and land grading send rainwater into the ground instead of toward the house.
Flood barriers & airbrick covers
Demountable barriers seal doorways and openings; airbrick covers and non-return valves stop water entering through vents and drains.
Tanking & waterproof membranes
Waterproofing creates a sealed “tank” around below-ground rooms, protecting basements and ground-floor voids in high-risk homes.
Raised services & electrics
Moving boilers, electrics and utilities above likely flood height reduces damage and keeps the property liveable during a warning.
Pumped drainage systems
Sump and pump systems collect groundwater below the floor and pump it out before it causes damage.
Tailored to the actual risk
Not every property needs every measure. The right package depends on flood source, depth, speed and how the house is built.
What drives the cost of flood-proofing work
We do not publish fixed prices because the right figure depends on a survey of your specific property.
Flood source and risk level
River and coastal flooding usually need more robust protection than surface-water flooding.
How much of the building is at risk
A single door and two airbricks are a smaller job than a full perimeter defence or basement tanking.
Existing construction
Solid stone walls, suspended timber floors and modern cavity walls each need different approaches.
Access and working space
Tight sites, terraced houses and properties below street level take longer to make safe to work on.
Products chosen
Passive automatic barriers, certified non-return valves and pumped drainage systems vary in price and maintenance.
Building control and planning
Some work is permitted development; some needs approval, especially in conservation areas or flood zones.
When to call a contractor
Speak to a contractor before you make large decisions — not after you have ordered products online.
- A flood warning, insurance condition or surveyor’s report has flagged your property.
- You are planning an extension or renovation in a flood-risk area.
- You have seen water in the garden, driveway or road during heavy rain.
- Your insurance renewal has introduced flood exclusions or a higher excess.
- You want to future-proof a property against heavier winter rainfall.
Local to West Wales
Based in Aberaeron, Ceredigion, working across Ceredigion, Carmarthenshire and Pembrokeshire.
Design and build
One team handles the assessment, design and physical works — no gaps between consultants and trades.
Building control ready
We coordinate planning and building-control submissions where they are required.
Honest advice
If expensive works are not justified by the actual risk, we will say so.
Flood prevention FAQ
The questions homeowners across West Wales ask most often.
How can I check my flood risk in Wales?
Use the Natural Resources Wales flood map and long-term flood risk checker, both free online. Enter your postcode or address to see whether your property is in a flood zone, the type of flooding, and the likely severity.
How can I check if my property is at risk of flooding?
Check the NRW flood map, your local authority’s surface-water flood map, and any environmental search or homebuyer report. If you have lived in the property, your own records of garden flooding, blocked drains or water in outbuildings are also useful evidence.
What are the main preventions of flood damage to a house?
The main measures are: improving site drainage and soakaways; installing flood barriers, airbrick covers and non-return valves; tanking or waterproofing below-ground spaces; raising electrics and boilers above flood level; and, where needed, installing a pumped drainage system.
How much does it cost to flood proof a house?
The cost depends on the flood source, the parts of the building at risk, the construction type, access, and the products used. MGC provides a fixed quote after a site survey. If expensive works are not justified by the actual risk, we will tell you.
Get practical, proportionate flood protection advice
If your property is in Ceredigion, Carmarthenshire, Pembrokeshire or the coastal and river corridors of West Wales, MGC can carry out a flood-risk assessment and recommend the right level of protection.
Builders you can actually get hold of.
Design and build across West Wales and Cardiff — from new builds to roofing, solar, steel and flood prevention.