At THS Concepts we help our clients across London and the South East get their construction and engineering projects off to the best start. From measured building surveys to topographical surveys, we assist Architects & construction professionals looking for accurate drawings, value for money and great customer service.


We take time to ensure our clients get the exact information they need for their projects. We cover a range of different surveying and drawing types including monitoring surveys, measured surveys, setting out more. We work with clients from the start to an end of a design project, from the initial survey through to setting out.

Time and time again, we hear horror stories of companies that produce poor quality drawings, inaccurate surveys and simply don’t answer the phone. THS Concepts promises to keep you informed at every step of the project with email updates and phone support. Our 5 star Google / Trustpilot reviews back up our thorough standards.

Since 2013, we have been helping on a range of different project sizes and locations. We have worked on nuclear power sites to 1 bedroom apartments, from Liberia in Africa to Edinburgh Scotland. If you have any questions then please don’t hesitate to get in touch.



Hi, I’m Tom, founder and co-director of THS Concepts. I started the business in February 2013. Before THS Concepts, I was a marine civil engineer working for a company called Red7Marine.

I started the business to provide local architects with quality survey information to base their proposed designs from. Obtaining accurate survey information for a building project from the start is important. I found that architects often lacked the time and the equipment to undertake this task correctly.

The business was started from my kitchen table, however, this quickly graduated to a small office nearby as the business grew.

In 2014 I was joined by my good friend and now business partner Chris Horton (B.Arch). Before THS Concepts, Chris was working for SimpsonHaugh, a large architectural company based in London.

Chris has helped enormously with the business and has used his experience in architectural design to bring a new level of professionalism to the business.

Six years, three office upgrades and about 1,000 jobs later, THS Concepts is a team of six people and one of the leading surveying businesses in South East England. We’re based in Leigh-on-Sea, recently voted the happiest place to live in the UK.

Chris and I both have our dogs (Rolo and Ronnie) which we are in the fortunate position to be able to bring to the office when they need looking after.

Tom Ayre headshot photo

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Tom Ayre Profile

Tom Ayre
Founder / Director

man on bridge with total station

Chris Horton

photo of Lesley Castle at THS Concepts

Lesley Castle
Office Manager

measured building surveyor in house

Jack Bidston
Measured Survey Manager

land surveyor at desk

Scott Watts
Land Surveyor

monitoring survey surveyor with total station

David Regan
Monitoring Surveyor

Ron the spaniel mug shot

Ron The Spaniel
Senior Good Dog

Rolo the Labrador mug shot

Rolo The Labrador
Trainee Good Dog


From our office in Essex, we undertake on-site projects across the United Kingdom and internationally.

We typically provide our on-site surveying services to clients across London and the South East. With a quick 45-minute train journey into central London or a 25-minute drive to the M25, we are ideally placed to serve clients in locations such as Essex, Kent, London, Hertfordshire, Surrey etc.

We do regularly operate outside of the South East and have undertaken work nationally in places such as Bristol, Nottingham, Southampton, the Channel Islands and Edinburgh. Internationally we worked in Liberia in West Africa and Ibiza, Spain.

Counties We Typically Work In

  • Berkshire
  • Buckinghamshire
  • Essex
  • Hampshire
  • Kent
  • London
  • Suffolk
  • Surrey
  • Sussex
  • West Sussex