Mould Removal in Harrow

Damp & Mould in Harrow’s Housing Stock

Harrow is the heartland of Metroland: mile after mile of 1920s–30s cavity-wall semis, with pockets of Edwardian terrace around Harrow-on-the-Hill and Wealdstone. A fast-growing rental and HMO market — particularly around Wealdstone and Harrow town centre — puts modern occupancy densities into houses built for single families, so condensation mould in bedrooms and bathrooms is the borough's dominant complaint, with penetrating damp from aging roofs a distant second.

Showing the 6 nearest of 19 specialists who serve Harrow. See them all →

Services Available in Harrow

Harrow in numbers: homes, flood risk and rainfall

Housing and flood figures are for the whole Harrow local authority area, which is wider than the built-up area alone. Rainfall is the nearest Met Office station's reading.

Sources: ONS Census 2021; Environment Agency flood risk, November 2026; Met Office climate averages.

Mould and damp help near Harrow

If you cannot find the right firm in Harrow, these are the closest places we list specialists for. Distances are in a straight line from the town or borough centre.

• Brent4 miles away
• Watford5 miles away
• Ealing5 miles away
• Borehamwood5 miles away
• Hillingdon6 miles away
• Barnet8 miles away

Guides

Harrow mould and damp: local answers

How many verified mould specialists cover Harrow?

8 verified mould specialists are based within 15 miles of Harrow, and 11 more cover the area from further away.

Who is the nearest verified mould specialist to Harrow?

Damp and Mould Solutions, based in London, is the nearest — about 5 miles in a straight line from the centre of Harrow.View Damp and Mould Solutions's profile →

Which services do specialists covering Harrow offer?

Of the 19 verified specialists listed for Harrow, 16 offer mould removal, 11 offer independent damp surveys, 8 offer damp proofing, 7 offer condensation control & ventilation and 6 offer structural damp & waterproofing. A specialist can offer several.

What kind of damp problems are common in Harrow?

Harrow's Metroland semis were built for single families — today's HMO occupancy densities around Wealdstone make bedroom and bathroom condensation the borough's dominant damp complaint.

How many homes in Harrow are rented?

In Harrow, 29.6% of households (about 26,500 homes) rent privately and 10.4% rent from a council or housing association. Across England the figures are 20.5% and 17.1%. A private tenant who cannot get damp or mould dealt with can ask Harrow's housing or environmental health team to inspect, as it can act on damp and mould as hazards.Source: ONS Census 2021 ↗

What kind of homes are there in Harrow?

Across Harrow, 16.9% of homes are terraced (England: 23%) and 33.3% are flats (England: 21.4%). 1.4% of households have no central heating (England: 1.5%) and 12.2% have fewer bedrooms than they need (England: 4.4%).Source: ONS Census 2021 ↗

Is Harrow at risk of flooding?

In Harrow, 1.3% of properties are in areas at medium or high risk (a 1% or greater chance in any year) of flooding from rivers or the sea (England: 1.9%) and 13.8% are at medium or high risk of surface water flooding (England: 5.9%). These are Environment Agency figures for the whole local authority (November 2026), not street-level: the GOV.UK flood service shows the risk for a single address.Source: Environment Agency flood risk, November 2026 ↗

How much rain does Harrow get?

The nearest Met Office climate station with a 1991–2020 average, Northwood, is about 4 miles from Harrow. It recorded an average of 686 mm of rain a year over 1991–2020. That is the station's reading, not Harrow's own: hills and coast can change rainfall noticeably over a few miles.Source: Met Office climate averages ↗