Gemini Builders

Building · Refurbishment · Maintenance · Interior Design

We are a dedicated building and refurbishment company committed to delivering quality workmanship. Whether it’s a full property renovation or a smaller-scale refurbishment, we approach every job with the same attention to detail, reliability, competitive pricing and respect for your vision and project.

Our Services

We specialise in building and property refurbishment, offering a full range of services from all types of extensions and conversions to bespoke joinery and interior design. Whether it’s a large-scale renovation or a smaller project, we approach every job with the same level of care, attention to detail, and pride in our workmanship. Our goal is to deliver high-quality, tailored solutions that bring our clients’ visions to life.

A little about us

We’re a family-run company with over fifty years of combined experience and trading since 2003. Our growth has been driven by the trust of repeat clients, strong word of mouth, and a reputation built on quality and reliability. We collaborate closely with a reliable network of architects, designers, building surveyors, structural engineers, and specialist tradespeople to deliver each project with precision and care. For those seeking a fully managed experience, we offer a complete turnkey service—handling every detail from start to finish. What sets us apart is our commitment to clear communication, high standards, and a personal touch in every job we take on.

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Our Projects

Below is a small collection of projects we’ve completed, showcasing the variety of work we undertake.
If you’d like to see before photos or learn more about any specific project, we’d be happy to share more — just get in touch.

As a project manager for high end retail clients, I have had the opportunity to work with Gary and Gemini over many years. We managed some very successful commercial projects. These include the installation of a designer Italian bar and restaurant in Luton airport, the fit out of the Longines hospitality suite at Royal Ascot and complete refurbishment of a showroom in Clerkenwell for Culligan International.

Simone Cortesi

From the very beginning, the level of service provided by Daniella and her team at Gemini was nothing short of exceptional. Daniella was incredibly professional, knowledgeable, and friendly, guiding us through every step of the process. She took the time to understand our vision and requirements, providing insightful suggestions and expert advice that truly enhanced our initial ideas.

Ashley Sondh

Daniella did an absolutely fantastic job – I can’t list everything otherwise this testimonial will go on forever, but essentially it involved coming up with a brand new kitchen, brand new bathroom, a new colour scheme for the entire flat, new carpets, new radiators, new cornicing and skirting, new shelves, new window coverings, and new lighting.

Richard Newton

Thank you to everyone at Gemini, My husband and I could not be happier with the works carried out on our home, what a difference it makes! Once again many thanks and we look forward to dealing with you in the future.

Sue & Richard

I have lived in my building for more than 10 years and in that time I have had many dealings with Gemini both as a private resident as also as part of my role as a director for the building.

Sarah North

Thank you so much to you and Karl and the team at Gemini, I can’t express enough how grateful we are to you all for your outstanding work, communication and patience with my back and forth.

Angela Martin

Thanks from everyone @TeensUnite to the team at Gemini for the work you have done today. A great job from a very friendly team. They were punctual, hard working, clean and tidy, what more do you need!

Lesley Morris

Very polite, punctual and high quality of work. I would highly recommend Gemini.

Richard Noakes

Leighton and his trusted team of experienced professionals are a pleasure to deal with, from planning a project to the finishing details.

Ricky English

We have used Gemini Builders for some years with great success. Gemini provide expert guidance and assistance in planning the way forward on all projects.

Mrs Jean Jones

Gemini was recommended to us from our architect. We had a kitchen extension built at the back of our terraced house in Camberwell. We are very happy with the results. It was scheduled to take 3 months and Gary and his team kept to it.

Glyn Drew

What an amazing job at transforming our recently renovated house into a beautiful home! Despite us living abroad, having a very tight time frame and big ideas, Daniella & Stephanie achieved the impossible. They took control of the whole process, from the initial design concepts right through to furniture sourcing, soft furnishings, artwork, lighting. Nothing was too much trouble and it was magical walking into the finished project 3 days before Christmas! We have had so many compliments from friends and family who have come to visit. But most importantly it has been so lovely to spend time here as a family, the kids absolutely love their new bedrooms and get so excited to come back. We are so happy with the service we received from start to finish and would definitely recommend in the future.

Claire and Jamie, Shenfield

When you are dealing with people who take pride in their work you can let them get on with it in total confidence. That was very much the case with my Wapping flat. From our first meeting it was clear that Daniella really understood the flat and its features - exposed steel structural supports, wrought iron and the high ceilings consistent with an authentic warehouse feel - and it was equally clear that what she brought to the table was a lot more than a list of suppliers.

Charles Hilliard – Wapping

I am just so thrilled and delighted and happy with these bathrooms. They are works of art! Massive thanks and congrats to Karl + team for his creativity and lovely ideas, perfect workmanship and precision, for clearing up beautifully each day. Thank you very very much. The bathrooms are just beautiful.

Lale Nicoletti

Gemini did an amazing job of insurance work on our flat after extensive water damage following a leak upstairs. They were prompt to communicate, very friendly and the standard of work was excellent.

Sabrina Harris

Very polite, punctual and high quality of work. I would highly recommend Gemini.

Richard Noakes

I was having a plumbing issue and contacted Gemini for a second opinion where I was no longer sure about my current plumber. Leyton provided excellent advice and although I had to stick with the original plumber, I was very grateful for his time and helpful suggestions. A nice company and I will contact them first next time!

Helena Darnell

Very helpful with giving estimates for work – i wanted a ballpark quote which was no trouble and they sent me an easy to understand breakdown of the work and costs associated. Quick to respond and will be following up with them when we’re ready to undertake the work.

Ivy Wykes

Thanks from everyone @TeensUnite to the team at Gemini for the work you have done today. A great job from a very friendly team. They were punctual, hard working, clean and tidy, what more do you need!

Lesley Morris

Came to fix my heating last week and were excellent – arrived early and were a pleasure to deal with.

Alex Moore

I would like to say how grateful I am to Richard for making the introduction to Leighton Fenn from Gemini Builders, who I found to be an exception to the rule having dealt with many builders in the past.Once I explained what the issue was, he quickly sought to find a cost effective solution as well as looking to ascertain the cause through a matter of elimination, rather than jumping to treat the symptom.

Janice Parkus

The carpenters installed the kitchen for us and were very good at suggesting and making any design changes needed during installation. Our neighbour carried out a kitchen extension at the same time and Gary and the team worked really well with her builders and architect. The work and quality of finish has been excellent. From our experience with Gemini we highly recommend them. 

Glyn Drew

Thank you so much to you and Karl and the team! I can’t express enough how grateful we are to you all for your outstanding work, communication and patience with my back and forth. You guys are truly amazing to get this all done with all the extras that were added and I don’t believe anyone else could have done it.

Angela Martin

We worked with Gemini on recommendation from a local business, to refurbish our wooden sash windows, and couldn’t be more impressed. Leighton was great – from quoting the job accurately through to completion, we were kept in the loop on what was going on and advised if there was a hold up, e.g., when bad weather meant they couldn’t work on the outside. Friendly staff and great service. Can’t believe what a difference it makes to the look and feel of the house. They dealt with the rot, re-placed and re-hung the windows and finished to a high standard. Meaning we could keep the original windows which look much better, and at a price that was far more cost effective than replacing them completely. I would have no hesitation in working with Gemini again or recommending them.

Kim Harris

Thanks again to you and the Gemini staff for taking on and executing that list of jobs so quickly, efficiently and properly. It was brilliant to be able to just give you the list, and get them all done in one visit. Also to know that the best solution will be looked for, for odd jobs like the cooker chain without a total kitchen re-model job. Which goes for the electric report, too, and the same goes for your assessment of the front wall. Being able to get these jobs done by such a trustworthy and professional bunch has taken away so much of the stress of being put under the unexpected threat of prosecution by Waltham Forest Council. My hubby was quite stressed about the whole business…and here we are all sorted. Fab! Just about to order my ’I love Gemini’ T shirt!

Sally Pennock

The renovations are fabulous! We are thrilled with the kitchen – you and the team have done a superb job. Congratulations from us to you and all involved.

David Skellern

Aaron did a great job cleaning the flat. The blinds look good as well. Many thanks for all your help sorting this out.  31st May 2016

James Starky

I would like to thank Gemini Builders for the extremely professional bathroom refit that they completed for my sister-in-law. She was overwhelmed at how good of a job they had done and I would have no hesitation in recommending Gemini builders to anyone, friends, family and strangers wanting any kind of refurbishment works.

Aaron Crolt

I Would like to take this opportunity to thank Gemini for the fantastic job you did in repairing my flat above the showroom. Having been let down on the flat sale twice at last knockings, I was very keen to carry out the minor maintenance and repairs as highlighted by one of the surveys. I was in a real quandary as who to use as I needed someone quickly and when Mark told me he had just met a ‘top’ builder at his BNI chapter, it was obviously fate. The job was done efficiently from the very start, carried out in a friendly and professional manner.

Brian Evans

Very happy with the work, promptness and the people doing the work themselves so no issues at all and will be using you again.

Andrew Dunbar

I am writing this testimonial to commend the workmanship of Gemini Builders who recently completed decorating the exterior rendered walls of my house. The company invisibly mended all the small and large cracks in the rendering to my complete satisfaction. The finished paint job was brilliant and I could not be more pleased! I would heartily recommend this company to everyone.

Jan Hatt

Gary, I’m very happy with the way the wall was made good, and the fridge and everything put back so nicely. I do feel very lucky to have Gemini to do everything required for my property, so politely and nicely — with no loud music too! I think your lads are lucky to be working with Gemini. I’ve had congratulatory remarks from neighbours too — especially about the colour of the front- and garage-doors!

Ann, Middleton Rd

Thank you to everyone at Gemini, My husband and I could not be happier with the works carried out on our home, what a difference it makes! Once again many thanks and we look forward to dealing with you in the future.

Sue & Richard

I have lived in my building for more than 10 years and in that time I have had many dealings with Gemini both as a private resident as also as part of my role as a director for the building. We have always been impressed by the quality of the work Gemini have done on behalf of the board and this is a relationship we wish to maintain going forward.

Sarah North

What a great response from your company and the gas engineer on site was extremely helpful, would recommend your company and would use you in the future.

Mrs. Howlands

A really big thank you to all the decorators from Gemini, for all your hard work on redecorating my home, you were extremely polite and your standard of workmanship was excellent. Many thanks.

Pura

Lizzie Hayes from here in property management commented on how effectively the work at Bath Road was carried out and by how friendly and helpful the team were. Thank you for your ongoing good service. Kind Regards Andrew 16th February 2011

Andrew (Hamptons International)

Just to say am very happy with the job Gemini did. Also felt moved to say that Phil was a great worker and one of the best my father has seen. That’s quite something to say as he has 50 years experience of dealing with Builders etc!! Very courteous and pleasant to have around but hard working, honest and diligent too. I feel nowadays it’s very hard to find good employees but you certainly have one there.

Arran

I just wanted to thank you all for your help in getting my window installed. Especially thanks to Leighton who toiled and scratched his head over the second installation – it wasn’t easy. All the best!

Marilyn

This is to report the very high quality of Sanda’s work, his punctually and professionalism……….He is the kind of worker that makes sure that your clients are happy and want to work with you again. Thank you.

Gregoire

I have been very pleased with the work Gemini have carried out at my offices. The work was carried out to the highest standard. I would be happy to recommend Gemini Building Contractors Ltd to anyone.

Mr. Martin

A big thank you to Leighton and the team at Gemini for the excellent works carried out, Many thanks

Dan (Ellis & Co)

Just wanted to say a very big thank you to Gemini for my lovely new extension, your guys worked really hard. We are so pleased with the final product! Can you please send a very big thank you to Micheal & Will who worked exceptionally hard and had to put up with my very bad cups of tea! Many thanks.

Jade Dersiley

Just a note, your guys are always here working hard but i was impressed with the guys on site today, good attitude, hard working and efficient.

Peter (WARMC)

Mission completed satisfactory. Tell big man Michael done an excellent job and as always very courteous. A very nice chap.

Sandra

As usual a pleasure to have such gentlemen on site as are all Gemini staff. They are all so obliging and extremely polite which means a lot to me

Sandra

All workforce that has been on site since the 7th January 08 from Gemini have been courteous, helpful, polite and professional such a pleasure for me to deal with they are all top men…Just thought i would mention this as they help make my day.

Sandra

Enough about us

Let's hear about you and your project

Whether it involves building maintenance, extensions, conversions, interior design, painting, or electrical work—regardless of size—we are committed to delivering your vision with the highest level of expertise and attention to detail. We’d love to hear about your project.

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