Damp Proofing in Greater London

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Damp Proofing in Greater London

Extensions such as garage conversions will usually require additional damp proofing to be installed through the conversion, as the pre-existing garage typically has a single skin design for walls and floors, which was not built to conform to building regulations for habitable rooms. This damp proofing will need to be put into walls and floors. In addition, the roofing of the garage conversion will need water proofing. The damp proofing for the floor of the garage conversion will in most cases be achieved by by using a damp proof membrane. This membrane is available in either solid or liquid form. The damp proof membrane will be put down either on top of the pre-existing concrete floor, underneath the new floor, or as part of both, depending on if the floor will be a solid or a floating floor. In some garages, the walls have been damp proofed, but this might need to be updated as part of the conversion to be able to meet current building regulations. The walls will need to be damp proofed to be able to safeguard the brickwork from rotting slowly as moisture sets in. This can be performed by either making use of damp proof membranes, waterproof rendering, or cavity insulation, depending on the type of walls that are already present in the garage. Damp proofing is an important part of the building regulations that the garage conversion will need to comply with, therefore is it necessary to make sure that your garage conversion incorporates suitable damp proofing methods.

Average Damp proofing cost in Greater London

The average cost of Damp proofing is £1500. Costs vary based upon the materials and the organisation selected. The upper price range can be as high as £1725. The material costs are in general about £375

Average price per Damp proofing job in 2025

Avg. price low

Avg. price low
£1,125
Avg. price

Avg. price
£1,500
Avg. price high

Avg. price high
£1,725

£1900

£1425

£950

£475

£0

Prices based on actual Damp proofing costs for Greater London, as reported by local LeadsDoWork members.

Damp proofing installation cost in Greater London 2025

Labour cost £1,050
Material cost £375
Waste removal £75
Time frame: 3-5 days

Damp proofing searches in March 2025

Damp proofing Projects in Greater London in February 2025

318,117

Requests for quotations in Greater London in February 2025

0

Requests for Damp proofing quotations in Greater London in February 2025. 0% change from January 2025.

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Requests for Damp proofing quotations in United Kingdom in February 2025. 0% change from January 2025.

Source: Numbers calculated based on the search volumes in major search engines

Damp proofing searches in counties near Greater London February 2025

Damp proofing near you

Greater London

The Greater London region has the second biggest population in the UK, just behind the South East. However, with the smallest land area of all 9 English zones, it comes with a large population density of 5,701 people per square kilometre; this is more than ten times of any other English region. London continues to increase in size over time, becoming increasingly industrialised. The City of London at the same time ranks as one of the most expensive urban centres on the planet, beside Tokyo and Moscow. For your household developments be sure to work with trustworthy firms and guarantee an excellent finish you will be proud of.

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Damp proofing pros in Greater London

MPC

2 review(s)
Based: in Brighton, BN2 6NN

Latest review

Libby S., BN1
27th January 2024
5

Building work | Damp Proofing in Brighton

Mark responded promptly to my enquiry and made an appointment to come and look at the issue in question very soon. He ar...

Tonbridge Construction and Damp-Proofing

1 review(s)
Based: in Tonbridge, TN9 2YR

Latest review

Andy L., TN12
3rd April 2015
5

Building work | Damp Proofing in Tonbridge

Very personable, honest and professional

Seal

4 review(s)
Based: in Chichester, PO209EA

Latest review

Sara W., RH15
16th January 2016
5

Building work | Damp Proofing in Burgess Hill

Still not had the quote sent to me :-(

Similar Customer Enquiries for Damp proofing in Greater London

24 Feb

Building work | Damp Proofing

London - E18

Enquiry from: Panny Z

Start Date: Immediate

There is rising damp on the inside of all the external walls. the flat is on the ground floor

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06 Jan

Building work | Damp Proofing

Brentwood - CM14

Enquiry from: Jenna R

Start Date: Immediate

Have one wall which is wet to touch and one that is very mouldy (the other side is a communal hall which is also impacted). Looking to see what is causing it to see if I (or landlord if structural or ...

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11 Dec

Building work | Damp Proofing

London - SW18

Enquiry from: Francois P

Start Date: Immediate

I have a small section in one of the bedrooms which has moisture ingress and actually got extremely damp with recent rains. I was hoping for a damp specialist to inspect this week and provide quote on...

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18 Nov

Building work | Damp Proofing

Bishop's Stortford - CM23

Enquiry from: James D

Start Date: Immediate

the main issues are dampness in downstairs bathroom and second floor bathroom, as well as potentially the living room. there is also ceiling damage and staining in the downstairs cupboard due to a pos...

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29 Oct

Building work | Damp Proofing

Ashford - TW15

Enquiry from: Marilyn T

Start Date: Immediate

I have a patch of slightly wet wall, I think the DPC has been damaged after gas fitter fitted gas pipe along the external wall where the wetness has appeared inside as this wetness, I don't think, was...

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28 Oct

Building work | Damp Proofing

London - N9

Enquiry from: Denise T

Start Date: Immediate

Bedroom has mould on an outside wall

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19 Jul

Building work | Damp Proofing

Brentwood - CM14

Enquiry from: Lauren B

Start Date: Immediate

We believe we have a damp problem in our house on the ground floor, and various areas of mould in the house. We would like to discuss how to solve this.

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29 Jun

Building work | Damp Proofing

London - SE12

Enquiry from: ANDREW G

Start Date: Immediate

Property is 9 New Buildings, FROME. ***. Survey and recommended treatment for damp and wood beetle damage highlighted on house buyers survey. Property is currently empty and under offer - keys availab...

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06 Jun

Building work | Damp Proofing

London - N9

Enquiry from: Kevin C

Start Date: Immediate

Damp proofing Lead Damp proofing Lead Damp proofing Lead Damp proofing Lead

Damp issue chimney breast 3m off the ground. Garage recently lead flashed against gable end below height if damp. Fireplace sealed 4 years ago and chimney not capped.

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05 Jun

Building work | Damp Proofing

Brentwood - CM14

Enquiry from: Jo M

Start Date: Immediate

My house has a damp smell

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25 Apr

Building work | Damp Proofing

Ashford - TW15

Enquiry from: Christina B

Start Date: Immediate

Damp proofing Lead

rising damp on the right side of the building near the front door are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: terrace please c...

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28 Mar

Building work | Damp Proofing

Harrow - HA3

Enquiry from: PRAFUL P

Start Date: Immediate

Damp proofing Lead

I* have damp not sure rising damp or condensation . It is understair case in a store the rest of floor been fitted with under floor heating . Need the treatment as well as filling up with concrete

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29 Feb

Building work | Damp Proofing

Staines-upon-Thames - TW18

Enquiry from: Saroj P

Start Date: Immediate

Damp course proofing in bathrooms

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20 Feb

Building work | Damp Proofing

Wembley - HA9

Enquiry from: Katharine R

Start Date: Immediate

mould on bedroom wall need this removed are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: semi detached please call to appoint

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07 Feb

Building work | Damp Proofing

Thornton Heath - CR7

Enquiry from: Myrna K

Start Date: Immediate

Damproofing. I. Bathroom and kitchen

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07 Feb

Building work | Damp Proofing

Staines-upon-Thames - TW18

Enquiry from: Vicky K

Start Date: Immediate

Hi there...I'm in the process of buying this property. Damp has been flagged up on the survey which has my concern. I was wondering if you could do a survey and quote for the potential cost? Kindest ...

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29 Jan

Building work | Damp Proofing

Brentwood - CM13

Enquiry from: Debbie B

Start Date: Immediate

Penetrative damp on inside of an external wall. Plaster bubbling and crumbling

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27 Jan

Building work | Damp Proofing

Thornton Heath - CR7

Enquiry from: Myrna K

Start Date: Immediate

Damproofing. I. Bathroom and kitchen

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25 Jan

Building work | Damp Proofing

Bishop's Stortford - CM23

Enquiry from: Will H

Start Date: Immediate

Good morning, I am buying a property at 27 Sidney Terrace at Bishop's Stortford. A damp survey has identified an area on an ezternal wall that has been repointed with the wrong materials and needs ...

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20 Jan

Building work | Damp Proofing

Staines-upon-Thames - TW18

Enquiry from: Stephanie T

Start Date: Immediate

We have a problem with our outside walls and window with condensation I think. Identification of the problem and then quote for any works to fix the problem

Post a similar request >

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FAQs

How can I tell what type of damp I’ve got?

Signs of rising damp tend to be close to the ground, usually no higher than a metre. It usually works its way up walls in horizontal lines. Penetrating damp usually develops in patches and can often be much higher up. For more advice, speak to a damp proofing professional.

How can I tell if my property has damp?

There are a few visible signs of damp, although it often goes undetected. However, in older or empty properties, this made become detectable through its smell. These include peeling paint and wallpaper, crumbling plaster, mould growth, black spots or spores on walls and ceilings, and rotting skirting boards and flooring.

How quickly can I redecorate my walls after damp proofing has been installed?

You should make sure that all signs of damp have gone before you redecorate your walls. If you want to paint your walls with a water-permeable emulsion paint, you can usually do this after 1 or 2 months. For other types of decoration you should wait longer.

Why is it important to fix a damp problem?

Damp is a serious problem, particularly if you live in an old property, because it can lead to structural damage. This will cost you big money and could be very dangerous, to yourself and the property. Take damp seriously and get it inspected and resolved as soon as you discover it!

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