Double Garage Conversions
Looking to turn two separate garage doors into one larger, more practical opening? At Fortress Doors, we can manage the complete double garage conversion from the initial survey and structural work through to the installation of your new garage door.
Every garage is different, which is why we’ll visit your property to assess the existing structure and recommend the best solution. Depending on your garage, the conversion may involve removing the central pier, installing a new steel lintel and completing any required brickwork, fascia, drainage or driveway repairs.
Once the structural work is complete, we’ll install your chosen garage door to create a clean, secure and more accessible entrance to your garage.
By coordinating the building work and garage door installation, we make the whole process straightforward, without the hassle of arranging multiple different contractors.
Thinking About Converting Your Double Garage?
Book a site survey with our experienced team. We’ll assess your garage, talk you through the options and provide a clear quote based on the work required.
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Here's What Our Customers Say:
Joanne Malyon
3 days ago
Very quick and easy to get installed
Excellent service 5 stars
martin youngman
5 days ago
Had a great experience using Fortress Doors. Our new roller garage door has greatly improved the look of our house. Andy and his fitting team have been excellent. Would highly recommend if you are looking for a new garage door.
Robert Brignell
7 days ago
A family run company. Everyone I met has been polite, friendly and helpful. They get on with the job at hand and are knowledgeable about the product they supply and fit.
I have used other garage door companies in the past - but I highly recommend Fortress Doors.
Mark Lindekam
3 weeks ago
Andy was very professional and explained all the options available. The 2 installers were polite, professional, on time and not only did a magnificent job, but left absolutely no mess.
We are extremely happy with our new garage door.
Teresa Elford
4 weeks ago
Had my new garage door fitted today and absolutely thrilled with it. The team who came to fit it were so professional, quick and tidy. All mess taken away too! 10 out of 10!
Mervyn Crampin
1 month ago
Phoned Fortress Doors, Andy answered the phone, appointment for next day, good conversation on the best type of door, quote accepted with a handshake and deposit paid. Three weeks and 2 days later two friendly and efficient fitters had fitted the new roller door and explained how it worked. Please don't worry about using this company for your new garage door, you will be kept informed and everything will be done on the agreed times. Thank you Fortress Doors.
Sarah Rue
3 months ago
Excellent product. I purchased the roller garage door. Came to the house on time to do a quote, no hard sell which is refreshing. Very polite and friendly. The fitters were also on time, polite and friendly. They did a great job, quietly and efficiently, then cleared up once they had finished. My son recommended Fortress to me so I knew I would get a great product. Thank you so much, I am delighted with my new garage door! I would highly recommend this company.
David Gittings
3 months ago
Extremely happy with our new garage door. Excellent communication, Andy is very friendly and helpful. The guys who installed the door did a professional job. I would highly recommend Fortress Doors for your new garage door.
Chris Carr
7 months ago
Couldn’t have been happier with service and the product. From getting a quote to fitting was around a fortnight and we are so pleased with it.
Fitters were great, old door taken away, no mess and spot on finish.
So happy we already recommended to family member who’s also had theirs fitted now and equally delighted
Elin Sinclair
7 months ago
Great company and staff!
They were on time and polite.
From the initial quote we even had the price reduced, because when the guys actually took the electric door apart it wasn't as bad as initially diagnosed.
I would definitely recommend this company and we will continue to get our garage door serviced by them.
Brigit Ensten
7 months ago
A good experience, professional quality service. Very happy with my new garage door and it’s always good to see people taking care of their work and customers👍 A big plus to meet Margaret too☺️
1bibbey
7 months ago
Fantastic door - We are really pleased. Andy was very professional from start to finish, different to other quotes as he actually brought a van with different types of working doors in so you could actually see the quality and options available before making your decision. The guys that arrived to fit it were straight to work from the minute they arrived and finished leaving a very neat install. I’d 100% recommend these guys if you’re looking to upgrade. And the finished product is stunning, really finishes off the driveway.
John Thorogood
7 months ago
Highly recommended! Immediately responded to my request for a replacement garage door fob to be programmed, helping me out of a worrying problem. Andy and Mark were absolutely brilliant in resolving the issue. A company which deserves support.
Caroline Jeggo
8 months ago
Called Andy from Fortress Doors, found his company recommended by several on a local facebook community post. Andy came round the same afternoon as he was just round the corner. Very knowledgeable, gave me options of what we could and couldn’t do. Didn’t try to put the big sell on me, was straight and honest and I got a bit of a deal for buying two together.
Felt very confident with him, just got that feeling of a decent, hardworking honest chap who is running a family business.
Said it would take around 4 weeks but doors arrived within 3 and fitted the following week.
Fitters were prompt and on time, polite and done a really good job. Quick installation took about three hours. All rubbish removed and tidied. Really happy with the work carried out. Would highly recommend to others. Thank you
Clive Matthams
9 months ago
After my old roller shutter garage door let me down I wanted a local reputable company to replace with a better quality electric roller shutter door.
Very professional service. No hard selling. Plenty of informative information. Professional install team, no fuss. Great handover etc. Very impressed. Very pleased. Highly recommend company.
Gavin Surtees
10 months ago
From the first contact with Andy to the completed job of replacing our double garage doors we were kept fully informed of progress throughout. I cannot fault their professionalism and attention to every detail. Very happy with the completed works and would certainly recommend speaking to Andy and the team if you’re in the market for replacement garage doors. Well done guys, marvellous job A+++
Kerry Dunn
10 months ago
I had my Roller Garage Door fitted in 2023 and it was first class service all the way through from ordering to fitting and up until now I have had no problems at all.
I had to call Fortress yesterday as it was 5pm and I had a problem with my door and I had an engineer come out to rectify the problem at 9am this morning.
The engineer was excellent, solved the problem quickly, and I even had a follow up call straight after the engineer left to check that I was completely happy, which I was, so I’m leaving this review as a happy customer of a company that provides a top class customer service not just at point of sale but with excellent aftercare which you don’t always get these days.
Please do not hesitate to use this friendly company for yourself as you will get a top quality product and top quality service and aftercare.
Many thanks to you.
Paul Sheehan
10 months ago
I needed a garage door installer which could also quote for the work needed to install a lintel.
Andy of Fortress offered advice & was able to adjust the original order to my preference with no hassle.
He was able to provide the lintel work with his trusted contractors Oliver Mathew Construction on the Monday & Andy’s team installed my electric garage door the next day as agreed.
Both teams were friendly, helpful & workmanship was excellent & both cleared up afterwards.
I needed a one stop service to avoid potential headaches & problems with dealing with separate companies & Fortress did this with a hassle free install.
Highly recommended.
Raymond Miller
1 year ago
We have had our garage door replaced today by their installers. What a wonderful company to deal with. The whole process was seemless from start to finish.
It is great that this company sponsors the dogs trust and have made a donation as dog lovers ourselves after meeting the lovley Margaret the four legged member of the team.
Definitely recommend this company.
davecatalyst
1 year ago
Very happy with our new roller door, the garage is already much warmer and feels more secure.
Bob Eason
1 year ago
Had an issue with our electric Roller Garage door fitted by Fortress Doors as it would not open with the remote. Contacted Andy last night who kindly rerouted his guys from their first job this morning to come to ours. They quickly identified it was an electrical supply problem. I expected to pay, as there was no fault with the door, but on thanking Andy for their excellent service he waived any charge. Great service from a great company.
Thomas Lait
1 year ago
Great customer service, can’t fault from start to finish and very reasonable prices
Kelly Hammond
1 year ago
Great service from Andy. Would highly recommend!
Paul Spalding
1 year ago
Mark arrived on time, as agreed to convert my electric up and over garage door back to a manual operated door. The conversion took quite a bit longer than estimated but Mark completed the project with a smile. Despite the additional time, I was charged the original quoted amount for the job. Mark was a pleasure to deal with and I would strongly recommend Fortress Doors for any Garage project you may have.
Lorna Morris
1 year ago
Thank you. My parents had a problem with one of their garage doors. Fortress sent someone over within 2 hours at 6pm in the evening to secure the door and will be back inca few days to fix the problem.
Dave wright
1 year ago
I couldn’t recommend Fortress Doors highly enough! Andy was brilliant from start to finish — really knowledgeable, professional, and clearly takes pride in his work. The quality of the door and installation is absolutely spot on, and he made the whole process easy and stress-free. It’s rare to find someone so reliable and meticulous these days. Thanks again Andy — top service and top quality!
Will be recommending!
Thank you again
David and Paige.
Andy Coward
1 year ago
Great service from quote and demonstration of product prior to order to fitting and installation. Clean and tidy and has given our house frontage a real uplift. Thank you Andy and team.
Mike Gaukroger
1 year ago
Had our shutter doors fitted today. They turned up on time and worked hard all morning and finished within three hours and did a lovely job. A very professional service from quote to fitting. The door looks great I am very pleased with them and would recommend to anyone in the Colchester area.
Sam Egner
1 year ago
Purchased a door a couple of years ago, door randomly faulted on Friday afternoon. By Monday morning the faulty unit was replaced and door fully functioning, no hassle at all. 10/10
Twentyone Cubed
1 year ago
5 weeks from first quote to install. Fantastic customer service all the way through and couldn’t be happier with the final install. Couldn’t recommend highly enough. Have a good one Margaret!!
Phil Turland
1 year ago
Excellent service from Andy and the team. The quality of the door is exactly as promised, really pleased, wish I’d had it done years ago.
Michael Cochrane
1 year ago
Great service and great quality. Very pleased with the whole experience.
Virginia Fewell
1 year ago
From the time we accepted the quote to the completion on installing the garage door, Andy kept us informed of the progress of the door being made and when to expect the installation. Date agreed and the guys arrived and removed old door and installed the new roller door within 3 hrs including cleaning up completely.
Fantastic Service all round. Would recommend them 100% for their Professional Service, workmanship and quality of their product.
Jennifer Darling
1 year ago
Really pleased with the service we received from Andy and the team. Top quality products and a friendly service, bonus points for cuddles from the lovely Margaret 🐶
Ella Crisp
1 year ago
Andy and the team at Fortress Doors were a pleasure to deal with from start to finish. Super professional but also really easygoing - they made the whole process of getting our new garage door sorted stress-free. The quality of the work was spot on and I wouldn’t hesitate to recommend them.
Amelia Kemp
1 year ago
Andy was absolutely great. My new roller door looks amazing and they even got rid of my old one. Hassle free, great quality and fair prices!
Tracy Meakins
1 year ago
Wow!! Great service from survey to installation! Defo know their garage doors and what a great product installed. Just what we needed to secure our garage.
Would highly recommend- don’t hesitate give them a call!!
Sue Jackson
1 year ago
We were absolutely delighted with the service and advice we received in choosing garage doors and in the subsequent supply and fitting. Thank you.