Seako Construction Group Ltd.

Construction Specialists, Building Company Cambridge

Building contractor operating in London and Cambridge, offering extensions, loft conversions, and renovations.

Welcome to Seako Group, your local building company serving Greater London, Cambridge and the East Anglia area. A family-run business, we strive to help you transform your property into something you can be proud of.

Based in Cambridgeshire, our building company works all across the local area as well as throughout London. This includes Hitchin, St Neots, Cambridge, and Huntingdon.

When you need work carried out on your property we’re the first place to look - we're proud to carry out a number of different types of building work for a variety of very happy clients.


What We Do

At Seako, we specialise in large residential construction projects and take on all aspects of the contract from start to finish including; 


  • Extensions

  • Renovations

  • Kitchens & Bathrooms

  • Large Scale Refurbishments

  • New Builds

  • Listed Building & Conservation Work


Over the years we have worked on a variety of different building and construction projects which has given us a diverse skillset and in-depth industry knowledge. We are able to take on any building project and offer a holistic service, managing the entire project from start to finish.

We also have a sister company, London Garden Studio Specialists, through which we sell bespoke garden offices in London and the surrounding area.  


Why Work With Us?

When it comes to any kind of building work, finding a company you can trust is often the hardest part and utilising a company you’re unsure of can result in an end result that you’re not happy with. With Seako Group, you can rest assured that no matter if it’s an extension, loft conversion, or listed building work, you’re in good hands.


Over the years we’ve dedicated ourselves to carrying out high-quality building services and are a proud member of the Federation of Master Builders. We’ll work to your requirements, within your time frame, and always strive to be timely and tidy. 

We offer free, no obligation quotes and would be delighted to discuss your projects with you.

Carpenter Measuring Wood


Seako Group specialises in renovations, extensions, and home repairs.  We cover Cambridge and surround areas. With a highly experienced team, we have the ability to work on any building project., whether it be residential or commercial; from small projects, to new builds and large extensions.


We take great pride in our work and aim to deliver exceptional project management, working closely with our clients to ensure an outstanding final result.


We have established ourselves as a trusted building contractor with a real focus on transparency and a proven track record of delivering contracts on time and within budget.

On time

In budget

Free quote

What Our Clients Say


"George and team carried out a rear extension compromising of additional sitting room and utility room space. They finished on time and we are very pleased with the final results. The work has all been finished to a high standard and we highly recommend them. 5 stars all ‘round!"


"Amazing company turned up on time stuck to budget.
Recommend for any job from loft conversion to full."


"Very happy with the finished product. Everything from the quote to the actual work was very efficient. Quote was very reasonable and the end product looks fantastic. Would definitely use Seako Construction again."



"Customer service is important to us and the Seako Construction team with George and Ashley never let us down. Right from the initial correspondence to the cleaning up at the end of the project there was no fault. A difficult job was accomplished on time on budget and with the highest quality finish. I will be definitely using them again and would highly recommend them to anyone."


"George and his team were excellent and kept me up to date and well informed throughout the project... They completed the project within the estimated time and budget... I could not fault them for their professionalism. I would recommend Seako construction and would be happy to work with George in the future. Definitely recommend."