Greenoaks Concept & Design
Garage Conversions
Convert Your Garage, Into a Pratical Living Space
At Greenoak Concept & Design, we offer a practical and cost-effective garage conversion service designed to create valuable extra living space within your home.
As a family-run Essex home improvement company, we have extensive experience across a wide range of property improvements and specialise in high-quality garage conversions.
From initial design through to completion, we know what we’re doing when it comes to converting garages, so you can have complete peace of mind that your home is in safe hands.
Our aim is to provide a smooth and stress-free garage conversion. We take care of building regulations, Part P electrical certification and any planning permission where required, alleviating the worries that can often come with conversions.
If you need extra space, a garage conversion is one of the most effective ways to extend your home, creating a larger living area while adding real value to your property.
Whether you’re looking to create an extra bedroom, living space, dining room, bathroom, home office, playroom, granny annexe, teenage room or home cinema, we’ll tackle the project from start to finish with minimal disruption and mess.
If you have a garage and need an extra room, converting it simply makes sense.
After
Before
When you compare the cost and disruption of moving house with a garage conversion, the difference is clear. Stamp duty, estate agent fees, increased mortgage costs, removals, decorations and furnishings all add up quickly.
Much of this expense is unrecoverable, whereas a garage conversion allows you to invest in improving your existing home.
By creating additional living space, a garage conversion can increase your property’s value and provide a strong return on investment.
All of our work is fully guaranteed, and we carry full public liability insurance for complete peace of mind.
Call today to book your free, no-obligation site visit and quotation, or visit our Westcliff showroom for an informal chat over a cup of tea to discuss your plans.





Permitted Development
The type of garage conversion you choose may be influenced by building regulations, and in some cases planning permission may be required.
In many situations, converting a garage is classed as permitted development. This means planning permission is not usually needed, provided the work is internal and does not involve enlarging the building. If your home is listed, listed building consent may also be required.
We manage all building control requirements throughout the entire process, so you don’t have to worry about compliance.
Pre-start
You may not need planning permission, but building regulations mean that if you’re converting a garage (or part of one) into habitable space, you’ll normally need approval from your local authority. So, before work begins, you need to decide whether to submit a building notice or plan building regulation application.
A building notice application doesn’t call for pre-approved plans on smaller projects. Building work can get underway quickly and a building inspector will approve the works as they’re carried out. However, there are situations when a building notice can’t be used: visit Planning Portal to find out.
Exceptional from start to finish. From the initial quotation with Dale, to the exceptional installation team. along with regular communication from the team to let us know what was going on with our job, all the way through to completion. The install team were polite and the work was delivered to a very high standard. We are very happy with our conservatory conversion. Allowing is to get so much more from the room. It already feels so much cooler and will be a different room in the winter. Thanks to Dale and the team for your great work. I wouldn’t hesitate to recommend GreenOak and will definitely use them in the future!!!
Hardie Plank Fitted. I cannot recommend this company enough. From the start of the process to the end they have been nothing but professional. Dale explained everything & we have been kept informed throughout the whole process. We are extremely pleased with the outcome & are glad we choose Greenoaks to carry out the work.
Thanks to your engineer for fitting the new window into our office room. we are very pleased with the end result and would recommend your services again
I can’t praise the work carried out on my property. It transformed a very tired and scruffy frontage to a very modern looking property. The work was carried out on time by professionals who were very helpful. When completed all rubbish was removed and the surrounding area swept and cleaned. I have had several compliments from family and neighbours.
I recently had a window looking out into the garden converted into an external door with Greenoak Concept and Design. The customer service I found to be excellent throughout the process and the installation was incredibly professional with a great final product, finished to a high standard. Would happily and already have recommended this company.
I walked in to the showroom in January and was immediately helped by Dale. Information was supported by documents I could take away and peruse and questions answered on subsequent visits. There was no pressure to sign up and I appreciated Dales honesty and business values. The procedure from start to finish was clearly outlined and ran like clockwork. My conservatory roof was replaced to plan and the interaction of the team working together was exceptional. I have already benefited from the changes with this recent heatwave! So much cooler and to have additional space that is usable all year can only be a bonus and add value to my property. Its a technical and involved process, and the guarantees standing behind the completed product are reassuring. I cannot recommend Greenoak and their team highly enough (in fact my neighbours have already signed up on my recommendation!!)
I recently had new windows, a front door, and Hardie Plank cladding installed by Greenoak Concept & Design. From the outset, communication was clear and professional, and the whole process felt well-organised and stress-free. A big shout-out to Ed and Stewart, the team who carried out the work—they were not only skilled and efficient, but also incredibly polite, friendly, and considerate throughout. They took great care to ensure everything was completed to a high standard, and I really appreciated their patience and understanding whenever I had questions or needed time to make decisions. Greenoak weren’t the cheapest quote I received, but I believe the quality of service and workmanship absolutely justified the price—plus, I was given a fair discount for having all the work done together. Highly recommend if you're looking for a reliable company that genuinely cares about doing a great job!
We recently have had a new super lite roof completed on our conservatory after it being a room we couldn’t use as was either too hot or too cold. It is amazing. The difference it has made is unbelievable. The team at Greenoaks were all so efficient, punctual and hardworking. We couldn’t find fault in the service and work carried out and would highly recommend them to anyone.
We approached Greenoaks for their help in fully cladding our bungalow, from the very start Dale eased all of our concerns regarding the project. All of the reviews we had previously read were 5 star, so we were confident we had chosen the best company. Dale and his office team along with Stu and Ed our installers fully matched up to all the outstanding reviews, and we are exceptionally pleased with the finished work. They were professional and knowledgeable throughout the process and we would not hesitate to recommend this company for any home improvement you may have.
We had Greenoak Concept & Design carry out installation of Hardie Plank cladding to the front of our house and the renewal of our front door recently. From the initial visit right through to the completion of the work, Dale and his team were fantastic. They told us exactly what was going to happen, and when. Everything ran as Dale advised. Communication is key work like this and Greenoak were exemplary. As well as Dale, Mark their surveyor and the fitters Ed and Stu all did fantastic jobs. We are so pleased with the finished works. We would definitely recommend.
Really happy with the service from Greenoaks and great value for money. Wonderful communication and the quality of work. They installed three windows and a door to the garage.
Greenoak replaced some old timber cladding for us on the top part of the house and dormer windows with HardiePlank. They didn't try and push us into anything we didn't want, and did a great job. The work is fantastic, and the people were friendly and professional. I'm sure it's possible to find cheaper work if you want cowboys and squeaky plastic cladding, but we'd rather have someone who knows what they are doing.
Highly professional company. Contractors arrived on time, great workmanship, and left the site perfectly clean on leaving. From placing order to completion, amazing - well done !
We had our conservatory roof removed and a tiled roof added. The whole job was done very professionally. All trades persons arrived when they were supposed to and were very clean.Highly recommend this company
Very professional, very high standard of work. Really please from the first meeting to the final sign off of the extension. Would highly recommend.
If any company deserves a 5 star review it’s Greenoaks, from the first visit from Dale, to the installation of our fascias and soffits and the fantastic silicon render job done by Dave, Ray and Harry. Everyone at Greenoaks should be proud of what they do and I highly recommend this company to anyone looking to transform their home.
So pleased with our new front & back doors. Excellent communication throughout the whole process of design, survey and installation. Cannot recommend enough 👍👍
Good original consultation with Dale, general advice without being pushy. Survey efficient and quote broken down and understandable. Very good team from Greenoak, work done as per schedule, clean and tidy. Very considerate when one of us was unwell, kept the noise down. Problem with garage door investigated and rectified very quickly. Really pleased with final result, completely transformed external appearance of house. Thanks to whole team inc Tom Jay Mike Dave Callum Ed and esp Mark and Tegan.
Amazing service from start to finish. Wouldn't go anywhere else, highly recommend to anyone.
This my second time using Greenoaks Conecept and design , I cannot vouch for them enough ! Dale and the team completed a very a high standard of work throughout on a few properties for me and would highly recommend to anyone looking .
Highly recommend this company. Had our conservatory roof done and they did a fantastic job. They kept us informed every step of the way of what would be happening. Cleaned up at the end of each day and was very hardworking, polite and friendly.
Dale has been a star. From his first visit to give me a price, to completion of the works. Punctuality and communication of the Greenoak team (Dave/Ray/Callum) was excellent.I am so pleased with the job that Green Oak have completed for me. They were professional, tidy and worked so hard. The job is finished to a high standard and I will 100% use them again. Would highly recommend.
Job was done in the hours I was told. Very efficient and happy with my new conservatory roof. Thank you and would happily recommend Greenoak
We recently had relacement windows and doors by Greenoak Concept. Many thanks to Dale and all the team,they are very professional, punctual, polite and leave the job in a clean and tidy condition. Very pleased with the outcome, many thanks to all at Greenoak.
Dale and the Greenoak team are fantastic; having delivered 2 large projects on our house, both on-time and on-budget (and with a laugh & smile!) we can’t recommend them enough! Thank you!
We have had a solid roof put on our conservatory by Green Oak. We were very impressed from the outset. Dale took time to explain every aspect of the build bringing a model of the roof so we could see the construction. Then he left us think about it and there was no hard sell. The workmen were very pleasant, friendly and worked extremely hard. Despite being one man down the other chap worked late into the evening to make sure the construction was finished on time ( rather than have to come back for a couple of hours the following day), as did the man doing the plaster boarding. Every evening the site was left tidy and all rubbish taken away once the work was finished. The plasterer and electrician also did a brilliant job and all works was finished on time. We are really happy with the end result and couldn’t recommend the firm more highly. John & Rita Dobinson
So far very happy with the installation . Our tired old conservatory has been totally transformed by the team at Greenoaks. They worked cleanly and efficiently whilst navigating our day today running if the house. We’re actually looking forward to the heat of summer and cold of winter!!
Dale, you and your team, thank you so much for your time and dedication. Our new composite Rock door looks and feels fantastic. It feels really good using a local company that cares about their customer from start to finish. Thank you
Dale was very professional in giving us sound advice and explained the whole process from start to finish. The job commenced on time, Mike and Mark treated our home with respect and were very knowledgeable and kept us informed all the way along. The quality of work is excellent and we would recommend them.
We needed 11 new windows of various sizes so we spent some time searching reviews for a highly rated but local Double Glazing window installer. Greenoak came out top of our search results, We reached out and Dale responded quickly followed by a visit a few days after. The resultant quote was very competitive versus other quotes we had received. It was an easy decision to go with Greenoak. Dale came across as very knowledgeable, friendly and genuinely customer focussed. He invited us to the showroom in Leigh where he took us through the detail to ensure we were fully aligned on requirements and expectations. We were very impressed with him and his business and by his overall professionalism. The installation took place on 20th Feb 2023 and took 4 days in total. The whole process was exemplary, we could not fault the team in any way. They were tidy, considerate and very thorough. We have had windows fitted before by various other company's but the quality of fit and finish from the Greenoak fitters was far superior. The guys worked solidly and clearly did not skimp on anything, ensuring that the windows were not only properly fitted but sealed professionally too. They did an outstanding job including clearing all of the old windows and rubbish Overall we'd rate Greenoak at 10/10. We felt reassured by their high standards of work ethics, integrity and customer satisfaction. We honestly doubt there is anyone better out there for this type of work. We therefore wholeheartedly recommend them Ian and Jenny
Fantastic job done by Greenoak, the guys were professional, friendly and a pleasure to have in my home. I couldn’t be happier with the job they did. Highly recommended.
Brilliant company, very friendly and easy to work with. Very pleased with the finished cladding on our office wall - excellent quality and good value
Replacement Conservatory Roof. Fantastic company and service from the whole team! Dale is great and gave me a quote for my new lightweight roof, great bloke and not pushy, loved the fact he gave a all in price rather than start low and add extras. The fitting team are fantastic!, Mike, Mark and Casper treated my home like their own, , great attention to detail and did everything I asked to get the perfect finish, I honestly cant find 1 fault and I am fussy! I could not be more happier with my roof!! Take my advice, Don't look anywhere else ,I cant rate them highly enough. Greenoak are the BEST!
Following our initial discussions with Dale, our expectations were already set high when it came around to installation. Some truly awful weather right at the start of the installation virtually wiped out the first two days work, and the anticipated seven day build seemed to be in jeopardy right from the start. But Mike and his crew - supplemented by two and sometimes three others, working in still inclement weather, brought the build back on schedule by the end of day five, and the plastering and electrical second fix over days six and seven meant the whole project was delivered to time, and budget meaning that our initial high expectations had even been exceeded. I have nothing but the highest regard for their workmanship and scheduling - and not forgetting Dione in the office who kept me informed throughout and efficiently managed the stage payments. In my experience it is unusual to receive a great sales pitch and then to have that exceeded by the installation teams - I couldn't recommend Greenoak's services more highly.
When Dale came round he was just what we hoped for, professional, knowledgeable, obviously experienced and advised us wisely. This approach meant we never felt under pressure, gave us a competitive quote and we were happy to book our extension with him. No regrets, it was completed on time and looks fantastic. Thank you to all at Greenoaks, keep up the good work.
We recently had a new front door and patio doors fitted. Green oaks provides such a great service. Communication all the way through as well as quality doors. Very happy with the service I received. I will definitely be using again and also recommending. Thank you
I can't recommend Green Oak concepts enough. They completely changed my conservatory by replacing the roof, Plastering all the brickwork, and putting spotlights in the ceiling. Their team were very professional, clean, and tidy. Green Oak Concept is the company if anyone is considering replacing a conservatory roof.
I simply can not recommend Greenoak highly enough. The cladding used to update my property not only come in under budget but has also got the neighbours talking!! From brief to installation I found the team very helpful and professional. Thank You to all the team!
From ordering windows, and cladding,to the finish result was great. The fitters done a brilliant job ,and we are so pleased with the end result. Thanks to Dale and staff.
Greenoaks did a brilliant job on converting my brick built shed to a summer house. I cannot recommend them enough. They work hard, did a brilliant job , were very polite and knowledgeable in their field
Very happy with new windows, professional, polite service and good value for money. Did exactly what they promised. Would recommend.
"Lovely guys, very professional. Very thorough, helpful and great attention to detail."
Greenoaks installed a replacement patio door for us which required them to negotiate with another of our suppliers as the door was onto a balcony. All the team at Greenoaks acted in a professional manner including office, survey and installation, making it stress free for us. We are very pleased with the final product.
A fantastic job! Expertly managed and finished! Superb attention to detail and craftsmanship! The house looks fantastic! Thank you very much Dale, Mike,Mark and all atGreenoak!
So far so good. We only popped in to enquire. Very friendly, not pushy..at all...gave us a brochure and some good advice. If the price is right we will definately use them.
Our team are
ready and waiting
to help you...
Greenoak Concept & Design have been raising the standards for more than 14 years.
More about us: We’re an independent Essex-based specialists in high quality UPVC Windows, Doors, Tiled Conservatory Roofing, Wall Cladding, and Fascias, Soffits and Guttering.

