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Subsidence costs

How much will repairing subsidence cost?

It can be a worrying time when you discover subsidence in your home, and one of your primary concerns will be how much subsidence costs to fix.

Depending on the severity of the problem and the specifics of your property, subsidence costs can vary greatly, and Mainmark’s modern techniques may help you save thousands of pounds.

Three common techniques for dealing with subsidence in residential homes are underpinning, piling and resin injection technology. As a rough guide, these three measures for treating subsidence in an average three-bedroom home can cost*:

  • £23,000 for piling
  • £13,000 for mass concrete
  • £7,500 for Mainmark’s resin injection

*Average costs are based on October 2023 prices and are for comparable like-for-like results.

Other expenses may also need to be factored into your calculations, especially if you opt for one of the more disruptive traditional piling or mass concrete underpinning methods. For example:

  • Surveys, inspections and building control applications
  • Party wall agreements if you live in an attached or semi-detached property
  • Alternate accommodation for your family during the works
  • Hard and soft landscaping around your home after the underpinning or piling is complete
  • Disruption to your daily family life

With Mainmark’s advanced subsidence treatment and ground improvement methods, many of these costs can be mitigated or avoided entirely, helping you to save money.

Causes of subsidence – The signs

Why do subsidence costs vary so much?

Traditionally, the only solution for subsidence in residential properties was underpinning, using techniques such as mass concrete or piling. These involve digging out from under the foundations of your home, an expensive, complicated and time-consuming process that is disruptive to your home, family and probably your neighbours.

Mainmark’s methods, on the other hand, keep subsidence costs down because they are quick to implement and require none of the extensive digging under your home.

Our Teretek® resin injection technique is similar to keyhole surgery. We drill small holes, approximately 16mm in diameter, through the floor or under your home’s foundations and then inject our specially formulated resin into the soil underneath, often to various depths. Our award-winning JOG computer-controlled grouting technology can also be used to treat subsidence quickly and effectively. Mainmark ground improvement technologies:

● Support foundations by filling in any voids under your home
● Can gently lift your property, bringing it back to level
● Improves the soil underneath your house, increasing ground load-bearing capacity and mitigating liquefaction.

Once the work is completed, only minor repairs may be necessary, such as filling in the small holes drilled through your floors and patching up the cracks in the walls that were caused by the subsidence.

Mainmark’s methods typically take less than a full day, keeping subsidence costs – and stress – to a minimum.


Reducing the subsidence cost with modern methods that are fast, reliable and cost-effective.


Mainmark technologies that reduce the cost of subsidence remediation

Teretek® – Redcing subsidence cost with resin injection

Teretek® is an engineered solution for ground improvement and re-levelling of subsided residential homes, using a plural component, expanding polyurethane resin. Teretek® helps in reducing the cost of subsidence by working in a similar way to keyhole surgery. Small holes are drilled under the foundations in order for Mainmark’s proprietary, environmentally inert resin to be injected under the house foundations, improving the stability of the ground and re-levelling the home.

Teretek® resin injection technology

Reducing subsidence cost with JOG computer-controlled grouting

  • JOG computer-controlled grouting uses a multi-point injection technique. This technology typically uses cementitious grout to re-level structures, including residential homes. This means that the subsidence cost need not be high as the cementitious grout is injected under the foundations of your home, using computers to accurately control the injection amounts in the various predetermined locations.
JOG computer-controlled grouting

Mainmark technology benefits

Benefits of Mainmark’s treatments that help reduce the cost of subsidence


Our technologies are installed quickly and can be walked on soon after.

Environmentally inert

We use safe materials that are non-toxic and do not leach into the environment or affect the treated area.


Our solutions are surgical in nature, causing minimal disruption to you or your family.


Compared to other solutions, our technologies cost significantly less.


We’re happy to have helped

Soil stabilisation FAQ’s
What happens with unlevel driveways, floors and hardstand areas?

After the application of the Mainmark solution, unlevel surfaces will become aligned again as the ground underneath is strengthened and re-supported. Simple cosmetic repairs may be required.

Will there be a mess?

Very little, if any. We use Teretek® engineered Resin Injection technology, which is likened to “keyhole surgery”, or JOG Computer-Controlled Grouting, with no major excavation and minimal disruption or mess. The injection holes required are very small.

How long does it take?

Each project is different and depends on the required amount of lift, area for correction, building construction, and ground conditions. Most projects can be completed in a day or two, and we can work at night or on one area at a time, so your business can keep operating.

Do i need to send my workers home?

No, most projects don’t require you to vacate the premises or even move furniture or equipment. For the most part, you can keep operating as normal. Driveways can often be driven on in as little as 30 minutes after treatment.

What warranty will i get?

The materials we use have been developed for use underground and have been specifically engineered to resist shrinkage and deterioration. Teretek® is warranted by Mainmark for an industry-leading period of 50 years.

Is it safe and environmentally friendly?

Injected Teretek® and JOG materials are environmentally inert and have no detrimental effects on the environment.

Get a quote

Arrange a site assessment in three simple steps:

Step 1

Submit your enquiry using our online form. Include a brief message about the type of foundation issues you are experiencing.

Step 2

Our friendly customer service team will be in touch to schedule a site assessment that suits you.

Step 3

One of Mainmark’s experts will visit your home or property, assess the damage and determine the likely cause. They will establish the approach needed, create a plan specific to the needs of your building and provide you with a detailed quote.

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