Make more of your space
Garage Doors & Conversions Essex
Transform your property with expertly installed garage door and conversion solutions.
We’re proud to offer a wide range of garage solutions to suit every home and every lifestyle, whether you’re looking to boost security, improve insulation, create extra living space or simply enhance your kerb appeal.Â
Whether you’re looking for a modern electric roller garage door or dreaming of transforming your unused space into a home office or gym or guest room, we have the perfect solution to suit your needs.Â
Our garage doors and conversions systems are built with modern living in mind, energy efficient, low maintenance and secure as standard.Â
And if you’re considering a full conversion, we’ll organise every step for you, including insulations, electrics and approvals, ensuring your finished room looks and feels like a natural part of your home.
Based in Westcliff-on-Sea, our experienced team will take the time to understand your goals, whether that is space, comfort, security or added value, before guiding you through the best options for your style and budget.Â
Once you have chosen you preferred garage solution, Greenoak Concept & Design Ltd will manage the entire installation from start to finish, and every project is backed by our trusted warranty for complete peace of mind.Â
- Electric Roller Garage Doors
- Single Garage Doors
- Double Garage Doors
- Insulated Aluminium Garage Doors
- Remote Control System & Safety Features
- Lights and Automation Accessories
A Range Of Styles For Your Home








Garage Conversions & Living Space Transformations
If your garage is currently wasted space, cold, cluttered or just a dumping ground, we can help you reclaim it. Whether you’re dreaming of a home office, gym, utility room or guest space, a professionally converted garage is one of the simplest ways to gain extra room without moving home.Â
At Greenoak Concept & Design, we don’t believe in quick fixes or superficial makeovers. Every conversion is fully insulated, structurally reinforced and built to meet current building regulations, so your new room feels warm, quiet and comfortable all year round, just like the rest of your home.
Our experienced installers manage the entire process from start to finish, including electrics, flooring, plastering and approvals. You won’t need to juggle different trades or worry about compliance. We’ll guide you through the options, explain everything clearly and make sure the space suits how you want to live.
Not ready for a full conversion yet?
Our new insulated or electric garage door is a great first step that instantly improves security, warmth and kerb appeal while future-proofing your home for whatever comes next.Â
While long-term guarantees and honest advice, we’re here to help you get the most out of your garage, wherever you are on the journey.
After
Before
Finding the right garage door
Most garages are more than just a storage space, they’re part of your daily routine and contribute greatly to your home’s overall appearance, security and comfort.Â
Choosing the right garage door isn’t just about how it looks on the outside. It affects how warm the space stays in winter, how easy it is to use day-to-day, how much noise comes in from the outside and how secure your home feels.Â
That’s why we offer a range of insulated and electric options designed to improve both practicality and appearance. Whether you want more convenience, more comfort or simply a smarter-looking entrance, we’ll help you choose a garage door that suits the way you live.Â
Electric roller garage doors are designed for convenience and maximum space efficiency. Opening vertically and retracting neatly into a compact box above the doorway, they free up both the inside and outside of your garage, ideal for shorter driveways or tight parking spaces.Â
Operated by remote control, electric roller garage doors offer smooth, quiet performance at the touch of a button.Â
Insulated single garage doors are ideal for standard-sized garages where warmth and security matter. Built with layered materials to reduce heat loss and block draughts, they help maintain a more comfortable temperature inside your garage.
Whether you use the space for parking, storage or day-to-day access, an insulated single door offers a smart, energy efficient upgrade over traditional uninsulated panels.Â
Insulated double garage doors offer all the benefits of single insulated doors but on a large scale. Built for wider garages or twin openings, they provide easy access for bigger vehicles while still delivering excellent thermal protection.Â
They operate smoothly and look smart, helping to keep your garage warmer, quieter and more secure, ideal if you use the space regularly or want to improve overall comfort.Â
What is a
Garage Conversion?
A garage conversion is the process of transforming an existing garage into a fully usable room inside your home.
Instead of leaving the space cold or cluttered, we insulate the walls, floor and ceiling, install heating, electrics and proper flooring, and finish it just like any other room in your house.
Depending on your needs, it can become a home office, gym, utility room, playroom, bedroom or guest space.
Because the main structure is already there, it’s one of the most cost-effective ways to add extra living space without moving or building an extension.
Garage Upgrades FAQs
In most cases, no. Garage conversions are usually covered under permitted development. We’ll confirm this for you during our survey.Â
Most conversions are completed in 2-3 weeks depending on the size and specification.
Yes. Our garage doors are available in a wide range of colours from woodgrain, satin and laminate styles.
Yes. For doors we offer a free no-obligation site survey, bespoke manufacturing and professional installation. For conversions we will provide a free site visit as well.
For our double roller garage doors, we offer a five-year warranty for both parts and labour.
For conversions, our work is fully guaranteed and we also hold public liability insurance.
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.
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.

