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Marylebone · W1G, W1H, W1U, NW1

Damp Survey Marylebone: Damp, Mould and Water Damage Assessment

The Assessment (what many people call a damp survey) is one non-destructive visit that finds the cause of damp, mould or a hidden leak across Marylebone and the surrounding area, with a clear, insurance-ready report.

★★★★★ 5.0 from 22 Google reviews
Quick answer: If you have damp, mould or a suspected water leak at a property in Marylebone, your first visit is a Damp, Mould and Water Damage Assessment. Our specialists carry out a non-destructive investigation to find the root cause, then give you a written report with photographs and a clear plan to fix it. Your report follows within 3 to 5 working days of the visit. We confirm the price on a written quote once we understand the problem. Call 020 3051 8478.

Damp, mould & leak services in Marylebone

Marylebone's housing stock is dominated by Georgian and Victorian terraces, stucco-fronted mansion blocks and converted townhouses, many subdivided into flats during the mid-twentieth century. Original lime-mortar construction, ageing drainage infrastructure and poorly adapted basement conversions create persistent vulnerabilities to penetrating damp, rising damp and internal condensation throughout the area.

Leak Detection

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

Damp, Mould and Water Damage Assessment

One visit that finds the cause of damp, mould or water damage, and tells rising damp, penetrating damp and condensation apart. About the Assessment →

Mould Treatment

Treat black mould and deal with the moisture source behind it, so it does not keep coming back. Mould treatment →

Structural Drying

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

Areas of Marylebone we cover

We visit properties right across Marylebone and its neighbourhoods, including:

Common damp problems in Marylebone homes

Penetrating Damp in Georgian and Victorian Terraces

Marylebone's Georgian terraces around Portman Estate and Dorset Square were built using breathable lime mortar and soft London stock brick. Later repointing with modern cement mortar traps moisture within the wall fabric, leading to penetrating damp that appears as tide marks, staining and spalling plasterwork on interior walls, particularly on north-facing elevations exposed to prevailing wind-driven rain.

Condensation and Mould in Mansion Block Conversions

The large Victorian and Edwardian mansion blocks along Marylebone Road and around Cavendish Square were subdivided into flats with little consideration for ventilation. Thermal bridging at original solid stone lintels and bay window returns creates cold spots where condensation forms readily, leading to persistent black mould growth in corners, behind fitted furniture and inside built-in wardrobes.

Hidden Leaks in Basement and Lower-Ground Conversions

Basement and lower-ground floor conversions are widespread in Marylebone's townhouses, especially near Lisson Grove and the streets north of Marylebone High Street. Tanking systems installed during conversion frequently fail at wall-to-floor junctions and around service penetrations. Water ingress can remain hidden beneath screed or behind dry-lined walls for extended periods before moisture damage becomes visible.

What our customers say

Excellent
Rated 5.0 / 5 based on 22 reviews on
Tip: If a damp patch keeps coming back after redecorating, it is almost always a symptom, not the problem. An assessment that finds the source first saves paying for the same repair twice.

Request an Assessment in Marylebone

Call 020 3051 8478 or send us your details and we will agree a date with you. We work with homeowners, landlords and property managers across Marylebone.

Frequently asked questions

How much does a Damp, Mould and Water Damage Assessment in Marylebone cost?
We confirm the price on a written quote once we understand the problem. Your first visit is a Damp, Mould and Water Damage Assessment, which includes the non-destructive investigation and an insurance-ready written report with photographs. If leak detection is needed, we quote for it separately before any work starts.
Do you cover the whole of Marylebone?
Yes. We visit properties across Marylebone and the surrounding neighbourhoods and postcodes.
Can you tell the difference between condensation, rising and penetrating damp?
Yes, and it matters because the fix differs for each. Our assessment identifies which type you have using moisture readings and thermal imaging.
Do you provide reports for insurance claims?
Yes. Every assessment comes with a clear written report including the cause, photographic evidence and recommendations, formatted for insurers and managing agents. Your report follows within 3 to 5 working days of the visit.

More help in Marylebone

Leak detection

Trace a hidden water leak in Marylebone using thermal, acoustic and tracer gas methods, with minimal damage. Leak detection in Marylebone →

Structural drying

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

Mould removal

Treat black mould in your Marylebone property and fix the moisture source behind it. Mould removal in Marylebone →

See what you get before you speak to us: read a real report from start to finish.