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Westminster · W1, SW1, NW1, W2

Mould Removal & Treatment in Westminster

Professional mould removal across Westminster, treating black mould at the source. We find why the mould is there, condensation, penetrating damp or a hidden leak, then treat it and fix the cause so it does not come back.

★★★★★ 4.9 from 18 Google reviews · trusted by Westminster homeowners, landlords & property managers
Quick answer: If you have black mould at a property in Westminster, we remove it properly and deal with the moisture driving it, rather than painting over it. 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. We start with a damp and mould survey (£500) to find the cause, then treat the mould and fix the source. Call 020 3051 8478.

Leak to dry to treated, one company in Westminster

Westminster mixes Georgian and Victorian stucco terraces carved into flats, red-brick mansion blocks, post-war council estates around Pimlico and Churchill Gardens, and dense mews conversions. Solid walls, single-glazed sash windows, converted basements and high occupancy rates all restrict airflow and trap moisture, making black mould and surface mould a recurring problem across both period and modern Westminster properties.

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 →

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 →

Areas of Westminster we cover

We treat mould right across Westminster and its neighbourhoods, including:

Common causes of mould in Westminster homes

Basement and lower ground floor flats in Pimlico and Belgravia

Many stucco-fronted terraces were split into flats with the lower ground floor set below street level. These basement conversions sit close to damp soil and old brickwork, so penetrating damp and rising moisture through solid walls is common. Mould develops along skirting boards, in corners and behind wardrobes pushed against external walls, often mistaken for simple condensation until the source is traced.

Converted Georgian and Victorian townhouses with shared services

Properties in Marylebone and Fitzrovia were built as single homes and later divided into multiple flats sharing bathrooms, kitchens and ventilation routes never designed for that use. Steam and moisture from daily living have nowhere to escape, so mould gathers around window reveals, in bathrooms without extraction and on ceilings beneath older, poorly maintained roofs or parapet gutters.

Post-war estates and mansion blocks with concrete construction

Estates such as Churchill Gardens and nearby mansion blocks use solid concrete and brick construction with thermal bridging at window reveals and corners. Combined with limited background ventilation, this produces persistent condensation in bedrooms and behind furniture placed against cold external walls, leading to black mould that returns each winter unless the underlying moisture source is properly addressed.

What our customers say

★★★★★

I have been dealing with damp and mould for years but these guys were able to come in and resolve the problem quickly and professionally. Their prices were fair and reasonable and they got the job done clean. 10/10 would use again and would recommend.

Thersa Waron Eurmind, via Google

★★★★★

Very helpful and professional, easy to communicate with about my mould issues and I received fast responses from the company on the best solutions for me. would recommend to all friends and family. 5/5

Jensen B, via Google

★★★★★

I recently used a damp and mould specialist company and was extremely impressed with the service from start to finish. From the initial survey, they were knowledgeable, thorough, and took the time to clearly explain the cause of the issue rather than just treating the symptoms.

Tarik Barak, via Google

Tip: Wiping mould off with bleach and repainting hides it for a few weeks, then it returns. Mould is a moisture problem, so unless the condensation, damp or leak feeding it is fixed, it always comes back.

Mould problem in Westminster?

Call 020 3051 8478 or book a mould survey online. We remove mould and fix the cause for homeowners, landlords and managing agents across Westminster.

Frequently asked questions

How much does mould removal in Westminster cost?
It depends on the cause and extent. We start with a damp and mould survey at £500 to find the moisture source, then quote the treatment. Treating the surface without the source means the mould returns.
Is black mould in my home dangerous?
Black mould affects indoor air quality and is best removed promptly. We treat the mould and fix the moisture driving it, so the problem is dealt with at the cause.
Will the mould come back after treatment?
Not if the moisture source is fixed. We find and address the cause, whether condensation, penetrating damp or a leak, rather than just cleaning the surface.
Do you find what is causing the mould?
Yes. Every job starts by identifying why the mould is there, using a proper damp and mould survey, so the treatment lasts.