Local House Extensions Company

Do you want a reliable, experienced company to build an extension on a house at a low price? Raynes Construction can do exactly that!

With many years’ experience in designing and building house extensions, we can provide a stress-free experience from the beginning right through to the final finishing touches. Let us create additional space within your home; whether it’s for an office, bathroom or an extra bedroom, our experts can adapt your property to improve your lifestyle.

Recent Projects

House Extension Options

  • Single Storey Extension
  • Double Storey Extension
  • Front Extension
  • Rear Extension
  • Side Return Extension
  • Bungalow Extension
  • Kitchen Extension
  • Garden Extensions
  • And Many More…
Since 2013 Lofts, Extensions, Refurbishments

We have built its reputation on the values of professionalism, innovation, technical expertise, quality, and health and safety.

Affordable Home Extension Design & Ideas

Based in South West London, our house extension builders can take the project and make your dream home extension come to life. Once you contact our team at Raynes Construction, we will send out our specialists for a free consultation to discuss any requirements you may have and answer all your questions. We will then provide you with a quote bespoke to you. If you want a rear house extension or a front house extension, just discuss with our team, and we will be happy to design the best extension for you.

Whether you are looking to build a ground floor extension for a children’s playroom or if you want to extend your living room, speak with our team, and we will design your ideal additional room. Our modern house extensions are designed to bring in natural light, maximise space and add value to your property, contact Raynes Construction for more information on how a home extension can enhance your living space.


Google Reviews

What Our Customers Says

John was very helpful and responsive. He also recommended other helpful contractors
James Maclachlan
James Maclachlan
I had the pleasure to discuss the works needed for a full refurb with John. He was very prepared, technical and knowledgable. Despite not being able to work together due to my location (too far from where RPC operates), John still kindly offered to give me a very accurate quote of the costs. This tells you a lot about how much RPC cares about their clients, but most importantly people. I’d definitely recommend RPC!
Jack Digital
Jack Digital
Raynes Park Construction did some work to help sort out some damp issues in my Edwardian house which involved putting in a new concrete foundation. Jon project managed the work and was available and responsive throughout to help resolve any issues. The company definitely make the effort to provide good service and value having a good relationship with their clients. I would use them again for other work!
Alastair Salmon
Alastair Salmon
Jon, Charlie, and the Raynes Park Construction team did a fantastic job completely refurbishing our one-bed ground floor flat in Raynes Park. The job involved completely stripping everything back to the bare brickwork, re-plastering the walls, new flooring throughout, new kitchen and bathroom. Finished product was like a high-end new built flat. The build was in 2018, and it still looks like new. We liked Jon and Charlie, from the start, and struck up a good relationship. What we particularly appreciated was the clear communication and pragmatic advice. My mother now lives in there, and is very pleased with it all - no greater accolade than that!
Churchill Andrew
Churchill Andrew
Great team, gave me lots of inspiration about what could be achieved, and then it was carried out even better. Never felt talked down to, and very tidy work. Highly recommended.
Claire Soulal
Claire Soulal
We are generally happy with Jon and his team for the our kitchen work. They are very responsive in communication and update of the project progress. When there were problems encountered even after the project completion, the team was eager to sort it out asap, they value highly on customer satisfaction.
Shin Ru Lai
Shin Ru Lai
Jon, Charlie and their team built our loft extension during 2022, and we couldn’t be happier with the service they provided. They were incredibly helpful during the planning of the project, kept everything within budget and even helped source some of my wilder ideas such as a giant custom built window. I was very pleased with the efficient service we received and having now seen the quality of the work, we will be looking to have them back to complete a rear extension in the near future.
Aarti shah
Aarti shah
I have recently engaged with Raynes Park construction and found them to be professional, communicative and engaging.They offered fantastic advice and came across very knowledgeable. I look forward to collaborating on my next project. Michael
Michael Rowland
Michael Rowland
We had a very positive experience with Jon and Charlie who were professional, quick to respond and provided a comprehensive and competitive quote. We had a hard time deciding and we went with a different firm in the end - but we enjoyed all of our interactions and appreciated the honest and straight forward approach.
Alasdair Wood
Alasdair Wood
Raynes Park Construction completed a rear extension at our Wimbledon house in 2021. Jon, Charlie and the team were very professional, worked exceptionally fast and delivered on all levels. We have been impressed with their response times and after care and wouldn't hesitate in recommending them. They were at all times honest and clear which made working with them very easy. They were very flexible when providing us with a quote for the work and it was great to work with such a local business. We are very happy with our new kitchen and dining space!
Elgan Williams
Elgan Williams
  • Flat Conversions
  • Loft Conversions
  • Extensions
  • Renovations & Refurbishments
  • Architectural Services

House Extension Cost in Raynes Park, UK

The pricing for your house extension depends on many factors including where you would like the extension and how big the extension should be. Our architects have many years’ experience in designing a price that works for you and your budget. We aim to provide a service that is of high-quality and up to the highest standard for you to enjoy for many years. If you have any questions during the process, we also make sure there is some available who you can contact seven days a week. Whether you need a terrace house extension or a bungalow extension, the options are endless. There is no limit to how you can expand your home.

If you need a house extension specialist in Raynes Park, Wimbledon or the surrounding areas of South West London, look no further than Raynes Construction. Give us a call on 020 34755889 or email us sales@raynesconstruction.co.uk, and we will be happy to help you.


Whilst we didn’t proceed with our project due to external factors- we found Raynes Construction great to deal with. Charlie was very knowledgeable , personable and pulled together a very impressive quote with good detail. Wouldn’t hesitate to contact again.

Tom Moz, London
All works were completed to a very high standard, within budget and on time. We are very pleased with the end result and would be very happy to recommend Raynes Construction.
Kerry Champkin, London
I found Raynes Construction to be conscientious diligent builders who stand out from the rest, they completed my loft extension within a 5 week time frame from start to finish, would use again & fully recommend them!
Jason Raul, London
RPC worked brilliantly for us. They came in and re-laid the beams in the floor of our loft conversion after the original builders hadn’t done the job correctly. They were timely, courteous and very tidy, also providing a good value for money quote. I’d recommend using them for any type of building project and we would definitely use them again.
Briony Colburn, London
They did a great work with my house. I wanted to some reconstruction and called this company. Their professionals exceeded my expectations. The house looks great!
Callum Wilkins, London
Great company with great service!!!! Highly recommend and LOCAL!!!!!
Albi Kurti, London

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