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Trusted Traders

Cox Format Developments Limited

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33 Reviews

Opening Hours
Today - 07:30–16:30
  • Monday 07:30–16:30
  • Tuesday 07:30–16:30
  • Wednesday 07:30–16:30
  • Thursday 07:30–16:30
  • Friday 07:30–16:30
  • Saturday - Closed
  • Sunday - Closed


Cox Format Developments Limited is a professional building company. The majority of our work is through personal recommendations. We are always happy to show previous work and our customers are happy to let you look! We pride ourselves on quoting a good price and sticking to it. Unless you instruct us to, we never add on "extras" as some less reputable builders do as their standard practice.

Because we are professionals, we can see what work is necessary to achieve your objectives, and we price accordingly. Others may quote cheaper initially, then add on what they see as "unforeseen extras". We believe our work is cheaper for the client in the long run.

On Budget... On Time... Everytime.

More information can be found on our web site www.coxformat.co.uk or at www.facebook.com/cox.format
Please like and share our page.

What we do

  • Builders

    • Loft conversions
    • Extensions
    • Building services
    • Garage conversions
    • Log cabins and homes
  • Roofers

    • Chimneys
    • Flat roofing
    • Guttering, fascias and soffits
    • Lead work
    • Roof and skylights
    • Rubber roofing (EPDM)
  • Loft and property converters

  • Bathroom fitters

    • Bathroom design services
    • Bathroom refurbishment
    • Wet rooms
    • Bathroom Installation
    • Accessible bathrooms and showers
  • More Services

    • new build houses
    • velux windows

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

How can we be so sure?

100% of the reviews we publish have been through our stringent moderation process.

33 reviews
Customer Service
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Loft Conversion
Customer Service
A very professional company, work completed on time, on a budget all done to a high standard. Highly recommended.
John in Greater London Posted on 11/05/2021 , work completed 11/05/2021
Outstanding Loft Conversion Project
Customer Service
We cannot praise the team at Cox Format highly enough for their professionalism, efficiency and quality of work. Our loft conversion project was their first in 2020 after the national lockdown. We were naturally hesitant and we were working from home which was far from ideal with building works, yet the team ensured that we hardly knew they were there. They were so considerate of our work and our home. Every day they would brief us on the works taking place and every day they delivered. They were innovative, they were cooperative and they were so tidy. The day they broke through for the stairs we couldn't believe it hadn't always been that way - so mess free! Huge thanks to Mark, James and all the team for a hugely successful project. They finished on budget and on the exact date that they said they would complete. We would love to work with Cox Format again and we would have no hesitation in recommending them.
Customer in Greater London Posted on 02/05/2021 , work completed 10/07/2020
Fantastic Work
Customer Service
We used Cox Format to install a loft conversion. The whole team were extremley proffessional from start to finish. The work was carried out to an extremley high standard, the care and work ethic was outstanding, and the team were so tidy at the end of the day you would hardly know they had been there! The work was on budget and completed within 6 weeks. We are extremley pleased with the end result, which has improved our standard of living - highly recommend this builder!
Customer in Hertfordshire Posted on 26/01/2021 , work completed 15/12/2020
Loft Extension - Exemplary Work During Difficult Times
Customer Service
Well, what can we say other than Cox Format delivered an exemplary loft extension during incredibly difficult times. The primary team, lead by James, had a work ethic we've never experienced from any other trade we've ever worked with. Come rain or shine, they were at our door at 7.30am waiting to start work. And, at the end of every day, they took the time and effort to ensure they left the house as tidy as it could possibly be. A huge thanks to James, Ash, Jack (and the rest of their team) for their enthusiasm and efforts to ensure we achieved the build we were trying to achieve. From a back office point of view, Mark (Project Manager) was always in contact ensuring we knew exactly what was going on. He was always on hand should we need anything. Did we have any minor issues? Yes, of course. What job wouldn't have any? But, were they sorted out? Absolutely. The Cox Format team take pride in owning any challenges and ensuring they are solved. Would we use Cox in the future? 100% yes. In fact, we've already contacted them to obtain a quote for our side extension! Finally, just to say a massive thank you to Cox for their work.
Customer in Greater London Posted on 21/12/2020 , work completed 18/12/2020
Quality single storey extension
Customer Service
We had Cox Format complete our single storey rear extension. They took the project from start to end, using their in-house architect through to planning and the build. Our builders, Roy and Charlie were great. They worked incredibly well together and were quick, tidy and generally flawless in their craftsmanship. The brickwork was on point, with there not being a noticeable difference from the old build to the new. Mark was on hand to discuss any concerns, provide advice and dealt with the project throughout its entirety. We are very pleased with the finish. Thank you all at Cox Format.
Customer in Greater London Posted on 23/11/2020 , work completed 30/09/2020
Excellent job
Customer Service
Completed very professionally. Very happy with all the people involved and recomended. Finished on time and at the agreed budget. Thank you!
Customer in Greater London Posted on 10/11/2020 , work completed 31/08/2020
Professional From Start to Finish
Customer Service
After several glowing recommendations from business acquaintances about work that Cox Format had undertaken for them, and finding I needed a new roof too, we booked a consultation with Peter Maton the CEO. Peter visited us with Mark Rossi who was to become our Project Manager. With both, their experience and professionalism was immediately evident and reassured us from the start. One of the things that really sets Cox Format apart is that they deal with the job from start to finish. They designed the loft along with all structural elements, and dealt with the council’s Planning and Building Control all the way through to sign-off. The other is that they have trained all their staff from an apprenticeship level and it really shows in comparison with other builders who tend to sub out a lot of work. We received a very professional quote along with information on how to notify our neighbours of Party Wall issues. Once we accepted the quote, Mark came back with James, who was our onsite Project Manager. James was exceptional – he really managed all on site elements of the job from start to finish. He kept the job on-track and to an incredibly high standard, even our neighbours couldn’t stop singing his praises. The advice, support and quality of the workmanship was superb. Cox Format had a slogan on their banner which went up on our scaffolding, “On budget, on time….every time.” They more than lived up to the promise and we wouldn’t hesitate to recommend them.
Customer in Greater London Posted on 29/09/2020 , work completed 29/09/2020
Amazing piece of work
Customer Service
The job was to build an extension at the rear of the house for a wet room next to the small kitchen involving removal of an old toilet block which in turn would give further space to the kitchen. Plans and any queries were thoroughly talked through by the team with ourselves beforehand and throughout the job. Important to us. Payment was done as each stage of the job was completed and our satisfaction assured. The builder - professional - and crew were very hardworking, thoughtful, polite and tidied at the end if each day. The end result was a piece of craftsmanship - a creation of space one could not have imagined. We would recommend Cox for your building needs.
Customer in Greater London Posted on 02/02/2020 , work completed 11/11/2019
Loft Conversion to en suite bedroom in Barnet
Customer Service
Well organised and good communication ensured a good job with minor issues promptly resolved. We are very pleased with the outcome and would recommend Cox Format to others.
Customer in Greater London Posted on 31/12/2019 , work completed 01/11/2019
Throrough and pleasant
Customer Service
We have had two lots of fairly minor repairs carried out by Cox Format, both were done very well by very pleasant workers - recommended.
Customer in Greater London Posted on 11/11/2019 , work completed 28/10/2019