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St Johns Wood · NW8

Leak Detection in St Johns Wood

Non-destructive water leak detection across St Johns Wood, tracing hidden leaks with thermal imaging, acoustic sensors and tracer gas, then drying and treating the damage before it becomes mould.

Call 020 3051 8478Report a leak
★★★★★ 4.9 from 19 Google reviews · trusted by St Johns Wood homeowners, landlords & property managers
Quick answer: If you have a suspected water leak at a property in St Johns Wood, our specialists trace the source without tearing the place apart, using thermal, acoustic and tracer-gas methods. A leak is not over when the water stops. Mould can start within 48 hours, so we find the source, dry the structure and treat any mould, all with one company. Leak detection is £800 to £1500 depending on scale. Call 020 3051 8478.
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Leak to dry to treated, one company in St Johns Wood

St John's Wood is dominated by grand stucco-fronted Victorian and Edwardian villas, many split into flats, alongside large mansion blocks near Regent's Park and high-value basement conversions. This mix of subdivided period properties, shared communal pipework and ambitious below-ground extensions means a single hidden leak can travel between multiple flats before anyone notices, often through original lath-and-plaster ceilings never designed for modern plumbing loads.

Leak Detection

Trace hidden water leaks without unnecessary damage using thermal, acoustic and tracer-gas methods. Leak detection →

Structural Drying

Dry walls, floors and voids after a leak or flood with monitored dehumidifiers, to completion. Structural drying →

Mould Treatment

Treat and prevent the mould that follows water damage, dealing with the moisture source first. Mould treatment →

Damp Investigation

Tell rising damp, penetrating damp and condensation apart, so the right repair is done once. Damp investigation →

Areas of St Johns Wood we cover

We attend leaks right across St Johns Wood and its neighbourhoods, including:

Common leaks in St Johns Wood homes

Mansion block bathrooms leaking into flats below

St John's Wood's mansion blocks pack multiple bathrooms above one another, often sharing risers and waste stacks. When a shower tray, sealant joint or concealed pipe fails, water tracks along joists and drops through ceiling roses or light fittings in the flat below, sometimes weeks after the original failure, leaving management companies and neighbours disputing which flat is actually responsible.

Flat roof extensions on period villas

Many stucco-fronted villas have had rear or side flat-roofed extensions and loft conversions added over the decades. Felt and asphalt coverings on these additions perish with age and weather exposure, and joints around parapets or roof lights are common failure points, letting water seep slowly into insulation and timber above kitchens and bedrooms before any staining appears indoors.

Basement conversions and lightwell seals

Below-ground conversions and sunken lightwells are common in this area's larger properties, relying on tanking membranes and window seals to keep water out. As these seals perish or tanking is disturbed by nearby building work, groundwater and rainwater can find a way through, causing damp and hidden leaks in basement bedrooms, cinema rooms and utility spaces below the original house.

What our customers say

★★★★★

Was lovely working with the team and they did a fantastic and quick job to get all the mould out of my bathroom. Very much looking forward to working with them on other projects around my house!! Thank you for everything and shout out to Karim for being so sweet!

Mariama, via Google

★★★★★

Omg what brilliant service, excellent the cleaner did a very good job was efficient he took his time and cleaned everything, highly recommend S. Bessim…

Susan Bessim, via Google

★★★★★

Amazing company! They responding very quickly. They have a low prices as well, not crazy quotes like from others. Job has been done very quickly and team was very professional. I will use them in the future if I needed. Thanks!

Patryk Gutowski, via Google

Tip: If your water meter ticks over with every tap off, or a wall or ceiling stays damp with no obvious cause, there is a hidden leak. Finding it early is far cheaper than repairing the mould and damage it leaves behind.

Suspect a leak in St Johns Wood?

Call 020 3051 8478 or report a leak online. We trace, dry and treat for homeowners, landlords and managing agents across St Johns Wood.

Frequently asked questions

How much does leak detection in St Johns Wood cost?
Leak detection is £800 to £1500 depending on the scale and access. You get a written, insurance-ready report identifying the source.
Will you damage my home finding the leak?
No. We use non-destructive thermal imaging, acoustic sensors and tracer gas to pinpoint the leak before any access is opened up, so repairs are targeted.
Do you fix the damage after finding the leak?
Yes. A leak is not over when the water stops. We dry the structure with monitored dehumidifiers and treat any mould, so it is handled end to end.
Do you provide reports for insurance claims?
Yes. Every leak investigation comes with a clear written report including the cause, photographic evidence and recommendations, formatted for insurers and managing agents.

More help in St Johns Wood

Damp and mould survey

Find the real cause of damp, mould or a leak in a St Johns Wood property, with a written report and photographs. Damp survey in St Johns Wood →

Structural drying

Dry walls, floors and voids in St Johns Wood after a leak or flood, monitored to completion. Structural drying in St Johns Wood →

Mould removal

Treat black mould in a St Johns Wood property and fix the moisture source behind it. Mould removal in St Johns Wood →