Signs You Have a Hidden Water Leak (And How to Fix It Fast)

A hidden water leak is every homeowner’s nightmare — slow, silent, and often expensive if left untreated. Because leaks don’t always gush dramatically, they can quietly cause damage to walls, floors, and even your foundations before you realise what’s happening. The good news? Spotting the signs early can save you stress, money, and unnecessary damage.

At Cascade Water Services, we specialise in water supply pipe repairs and leak detection across Hertfordshire, Bedfordshire, and London. Here are the key warning signs to watch out for:


1. An Unexplained Increase in Your Water Bill

If your water usage hasn’t changed but your bill suddenly shoots up, it could mean water is escaping underground or behind walls. Even a small leak can waste hundreds of litres of water a day.


2. Damp Patches or Stains on Walls and Floors

Dark patches on paintwork, wallpaper bubbling, or damp carpets can all be signs of water creeping in where it shouldn’t. Don’t ignore these – they often point to a leak under the floor or within the supply pipes.


3. Reduced Water Pressure

Struggling to get decent water pressure in the shower or kitchen tap? If your neighbours aren’t having the same issue, it might be caused by a leak in your supply pipe.


4. Puddles or Unusual Wet Areas in the Garden

If you notice soggy patches, lush green grass in one spot, or standing water in your garden even when it hasn’t rained, it could be a leaking underground water pipe.


5. Strange Noises in Your Plumbing

Hearing hissing, gurgling, or the sound of running water when everything is switched off? That’s often the sound of water escaping from a hidden leak.


What To Do If You Suspect a Hidden Leak

  • Turn off the water supply at the stopcock to prevent further damage.
  • Check your water meter — if it’s still moving when no water is being used, you likely have a leak.
  • Call a professional — expert leak detection and pipe repair is the safest way to fix the problem fast.

Why Choose Cascade Water Services?

We provide leak repairs, new mains installations, and supply pipe replacements across Hertfordshire, Bedfordshire, and London. Our experienced team can:

  • Quickly locate and repair hidden leaks.
  • Carry out excavations and repairs with minimal disruption.
  • Provide both in-hours and emergency out-of-hours services.

Frequently Asked Questions About Hidden Water Leaks

💧 Who is responsible for fixing a water leak?
In most cases, homeowners are responsible for repairing leaks on their private supply pipe — that’s the pipe running from the boundary of your property into your home. The water company is usually responsible for mains pipes in the road. If you’re unsure, our team can advise you.


💧 How much does it cost to repair a water supply pipe?
The cost depends on the location and severity of the leak, as well as whether excavation is needed. At Cascade Water Services, we provide clear, upfront quotations so you know exactly what to expect before work begins.


💧 Can a small leak really cause damage?
Yes — even a tiny leak can waste hundreds of litres of water every day. Over time, this can lead to damp, mould, structural damage, and much higher water bills. Catching it early always saves money and hassle.


💧 How quickly can Cascade Water Services attend?
We offer both in-hours and emergency out-of-hours services across Hertfordshire, Bedfordshire, and London. If you have a leak that needs urgent attention, we’ll respond quickly to prevent further damage.


💧 Do you repair leaks without digging up my whole garden or driveway?
Where possible, yes. We use modern techniques to minimise disruption and carry out targeted excavations, meaning less mess and faster results.


🚰 Don’t Ignore the Signs

Hidden leaks don’t fix themselves — the longer they’re left, the worse the damage becomes. If you’ve spotted any of the signs above, contact Cascade Water Services today for fast, reliable water leak repair.

Bringing years of expertise & experience to the areas of Bedfordshire & Hertfordshire.