Our Services – Monitoring Surveys


THS Concepts provides easy to understand movement data for structures that are undertaking or near to construction works such as basements, extensions, underpinning etc.


THS Concepts provides easy to understand movement data for structures that are undertaking or near to construction works such as basements, extensions, underpinning etc.

Used by party wall surveyors and contractors across London and the South East, we provide easy to understand monitoring reports to record structural movement over time.

We put your mind at rest during your building works by undertaking detailed monitoring surveys and producing clear, easy to read reports that help demonstrate movement, or the lack of, during a building project.

Our monitoring service is typically utilised during projects where underpinning, basement excavation, and party wall works are taking place. The monitoring reports reports help you satisfy key requirements and agreements with neighbouring property owners.

During major structural works we recommend speaking to your project manager about monitoring intervals. Usually during heavy works the monitoring surveys are undertaken on a weekly basis and then moving to a monthly basis when the less intrusive works are taking place.

Get a Quick Monitoring Survey Quote

The Monitoring Survey Process


Prior to arriving on site we always issue our clients with a free monitoring proposal document outlining things such as where we are putting targets, what equipment we will be using and the movement trigger levels.

This document is helpful it clearly outlines the process and details for those who may not understand the monitoring survey process.


On our first site visit we will install the targets that we will be monitoring. These are usually white 25 x 25 mm sticky backed targets that are either mounted to the wall directly or secured on to metal brackets with adhesive.

For targets that aren’t on ground level we usually ask our clients to arrange access with ladders or access platforms however this is something we can arrange ourselves.


Once we have installed the targets we then return at set intervals to survey in and monitor the targets. Using a Leica total station we can record the vertical and horizontal movement to within 1mm.

Following this we then issue a detailed, easy to understand report illustrating the movement. We can also issue graphs illustrating the movement over time on each point.

Monitoring survey report example

Monitoring survey report – graphs example

Monitoring survey report – crack gauge example

Key Benefits of Our Service

Have Confidence In Our Service
Our professional service provides you with peace of mind with our £5,000,000 professional liability insurance and £5,000,000 public liability insurance. We also offer a 100% money back guarantee on all of our work if you are not happy with the result! We’re also happy to provide health and safety documents if required.

Professional Reports & Data
Your reports show horizontal and vertical movements over time in a clear, easy to read manner. We typically return all monitoring survey reports within 1 day of the survey. If we notice any major movements whilst on site then these will be flagged to the relevant site team member.

Excellent Client Relationships
Our Google & TrustPilot reviews demonstrate the level of customer service we provide both before and after a project has finished. Our experienced monitoring survey team have undertaken a number of different projects ranging in size from small underpinning to jobs to large 3-storey basement excavations.

Trust Our Measurements
Our surveys are undertaken using precise Leica equipment. You can trust that your design proposals will work with the space you have.

Let’s Get Your Monitoring Project Moving Today

Small or large, get in touch today to discuss your monitoring project and we can get back to you with a quote and a proposed start date.


Recent Client Reviews

“Very professional and efficient service provided. We have a slightly awkward property that required extra time to complete the survey work but that was not a problem or concern. Very pleased with the work performed.”

5 Star Google Reviews

Christian Crozier
(Google Reviews)

THS Concepts provided Echo Construction Group with regular movement monitoring surveys which have been off great use during our basement excavation works and recommend them!”

5 Star Google Reviews

Trevor Beeby

“As an experienced professional construction manager I would have no reservations in recommending THS. I am very pleased with the service they have provided me.”

5 Star Google Reviews



Why should I choose THS Concepts?

We have worked on over 1000 surveying-based projects and have an experienced survey team from engineering and architectural backgrounds. We pride ourself on our customer service and our high standards, but don’t just take our word for it: have a look at what our previous clients have said.

Where do THS Concepts operate?

We have worked as far away as Liberia in West Africa. However, 99% of our work is undertaken in London and the South East. This includes counties such as Essex, Hertfordshire, Kent, Suffolk, Surrey and Sussex.

If you are outside of these areas we are more than happy to provide you with a quote. Read more about the areas we cover.

What will I receive after my each monitoring survey visit?
  • Monitoring survey report outlining movement since the start of the project & since the last reading.
  • Monitoring graphs to easily visualise horizontal and vertical movement over time.
  • Photographs showing any visible signs of cracks (please request).
What size projects do you undertake?

We work on a variety of project sizes – from simple domestic title plan/boundary surveys to large construction projects. You can learn more about our previous projects by reading our blog.

What makes THS Concepts different?

Our exemplary customer service, friendly team and excellent communication. We offer a 100% full refund if you are not satisfied with our work (not that anyone has ever needed to ask us for one!). Our experienced, professional team has a mixed background of Civil Engineering and Architectural Design. Learn more about our company here.

What level of insurance do you have?

We carry £5,000,000 professional indemnity insurance and £1,000,000 public liability insurance, copies of which can be sent upon request.

What equipment do you use?

We use the latest Leica surveying equipment. It’s known for both its reliability and accuracy, which are extremely important in survey work. Our drawings are completed on industry-standard AutoCAD software.

How soon can you get to my project and turn around drawings?

Our typical lead-in times for surveys are 5 – 15 working days (on average, we get to your site within 7 days of your initial enquiry). Each job has a different turnaround time for completing drawings; a full set of measured survey drawings typically takes 3 – 6 working days, while some basic CAD draughting services can be turned around the same day. Typically we return monitoring survey reports within 24 hours of undertaking the monitoring survey; if requested we can usually get results back sooner.

If you are really pushed for time then please let us know and we shall see what we can do for you!

How much do you charge?

Cost depends on the job. We offer fixed-price quotes based on an estimation of the time required for your job, emailed to you as a formal PDF document including our terms and conditions, a suggested survey date and expected completion of the drawings. We aim to provide a price within 24 hours of enquiry.

How do you fix your monitoring survey targets?

Typically we fix 25 x 25 mm reflective tape targets to walls using epoxy glue. The reason being is that the targets have to be very secure to allow the subsequent surveys to be undertaken as accurately as possible. We ttry and place all targets away from locations where they can be peeled off and in areas where paintwork damage can be reduced.

If we need to fix prisms then this usually requires a little more work as we may need to drill into existing walls to fix and resin them in.

Do you undertake out-of-hours work?

Sometimes, depending on our availability and staff requirements. If your project requires us to visit on evenings or weekends please let us know and we will do our best to accommodate you.

Do you provide risk assessments & method statements for your works?

At THS Concepts we provide our surveyors with a method statement on how the work should be undertaken combined with a risk assessment outlining potential dangers on site and how these can be mitigated. If you need these supplied for your project then please let us know so as we can send before we arrive.

We fully understand the need to observe good health and safety practices for our staff and the people we work with. If requested we can provide full health and safety documentation for the work we undertake including method statements, risk assessments, COSHH etc.

Can you suggest a plan for the monitoring survey?

We can supply you with a monitoring survey proposal which outlines elements such as where targets can be positioned etc. We do advise that you speak to a Building Surveyor who can verify or set out the monitoring survey requirements.

Can I see an example monitoring survey report?

No problem at all. If you follow the link below you will see an example PDF report from a previous job we have undertaken. We have also attached an example graph showing the movement on one point. For privacy reasons, we have had to take the job name details off of the report.



Can I get in touch at any time?

Our office is open 9am – 5pm (GMT) Monday to Friday. Our number is 020 8935 5160. Outside these hours, we are contactable via email ([email protected]) and our online contact form. We’ll respond as soon as we can.