Koncept Home Improvements Reviews 34

TrustScore 3.5 out of 5

3.5

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Rated 5 out of 5 stars

We had our front door replaced by Koncept and from the point of sale to the installation has been faultless. Dan, Chris and Harley were very knowledgeable and answered all our questions. We had Phil i... See more

Rated 5 out of 5 stars

Koncept Home Improvements were fantastic! Super friendly and attentive staff in the show room (Harley & Chris). It was simple, easy and delivered much quicker than expected, with an excellent fitting... See more

Rated 1 out of 5 stars

Windows and sliding doors to new extension supplied by Koncept originally in July. Trickle vents in sliding had to be removed as they interfered with passing doors and replaced with sticky tape. Sti... See more

Company replied

Rated 5 out of 5 stars

We needed draft free replacement windows and doors for a 20 year old property that wasn’t standing up to the rigours of the Uk weather. Koncept did a great job on our son’s house so we didn’t... See more

Company details

  1. Double Glazing Installer

Written by the company

Supply & Installation of top quality UPVC, aluminium and composite windows, doors and rooflights to retail and trade customers in the Thames Valley Area.


Contact info

3.5

Average

TrustScore 3.5 out of 5

34 reviews

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Rated 5 out of 5 stars

Front Door

We had our front door replaced by Koncept and from the point of sale to the installation has been faultless. Dan, Chris and Harley were very knowledgeable and answered all our questions. We had Phil install our door and his service and attention to detail was second to none. Very impressed to say the least! We would highly recommend Koncept.

December 1, 2025
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Rated 5 out of 5 stars

Koncept Home Improvements were excellent I would recommend …

Koncept Home Improvements were fantastic! Super friendly and attentive staff in the show room (Harley & Chris). It was simple, easy and delivered much quicker than expected, with an excellent fitting. Chris was very attentive on the day to ensure all went to plan. Very happy with my new front door - thank you!

October 11, 2025
Unprompted review
Rated 1 out of 5 stars

Koncept poor quality and badly fitted. No aftercare.

Koncept came to install black aluminium windows and sliding doors in our new extension in July. The fit and finish was awful, and they are dragging their heels in sorting it out. The list of issues is long: Trickle vents in sliding doors interfered with passing doors, handles stiff, badly aligned frames, daylight visible between joints on door frames, window in garage fitted unevenly in brickwork, silver screw used on sill caps (then coloured in using felt tip pen), scratched window sill.

November 3, 2025
Unprompted review
Rated 1 out of 5 stars

So bad, and not yet sorted after 5 months

Windows and sliding doors to new extension supplied by Koncept originally in July. Trickle vents in sliding had to be removed as they interfered with passing doors and replaced with sticky tape. Still there in november waiting for resolution. Widow cill on one of the windows was scratched - not fixed. Daylight visible through joints on sliding doors not fixed. Frames on windows uneven and poorly finished. Window handles not aligned and some are very stiff. Window in grarage fitted unevenly in brickwork. The window frames are black, but silver screws used for sill caps and for rubber seals in sliding doors. The screws for the seal caps were then coloured in by concept using a felt tip pen! Trying to get them back to sort it is a nightmare, as we are now at the bottom of their priority list.

November 3, 2025
Unprompted review
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Reply from Koncept Home Improvements

Dear Simon & Christina,

Thank you for taking the time to share your feedback. We’re very sorry to hear that you’ve been disappointed with your experience so far — that’s certainly not the standard we aim to deliver, as I'm sure you can see from the numerous 5* reviews on this page.

We want to clarify that we take your concerns seriously and have been working closely with the product manufacturer to resolve the issues you’ve raised, as alluded to in previous email correspondence. Unfortunately, a number of the problems relate to manufacturing defects rather than the installation itself, and we’ve been waiting on the supplier to provide replacement components.
We completely understand how frustrating these delays are and apologise that this has affected your project timeline, however we do feel that using two separate accounts to leave two poor reviews for the same job may be verging on unfair.

Please note that we have not requested any payment while we continue to put things right — our priority remains ensuring that you are happy with the final result. Our team will stay in contact with you until every outstanding matter has been resolved to your satisfaction.

I would like to highlight that the silver screws are factory-issued with the cills, and we have used a specialist RAL-matched touch-up pen to colour-code the screws; not a felt-tip pen.

We do appreciate your patience and the opportunity to address these issues properly, and we are booked to return to site next week to finalise the snagging. You are certainly not at the bottom of any list.

Kind regards,
The Koncept Home Improvements Team

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Rated 5 out of 5 stars

Two years on and still happy

We needed draft free replacement windows and doors for a 20 year old property that wasn’t standing up to the rigours of the Uk weather.

Koncept did a great job on our son’s house so we didn’t even get an alternative quote as they came - listened - recommended- listen again - modified pre production then fitted on the agreed day and times.

Our neighbour who worked for a rival company inspected the job after they’d finished and commented the job was b****y brilliant .

We’ve waited 2 years to review just to see how things settle .. and in the words of our neighbour they’re still b****y brilliant.

Thank you Koncept

August 3, 2024
Unprompted review
Rated 5 out of 5 stars

Brilliant experience with all the team.

Brilliant experience with all the team at Koncept. Patient and highly informative when we were figuring out what we wanted. 100% on the mark with the order. Accommodating with the fitting dates. The fitters then did a superb job and left everything immaculately clean. We really love our windows and doors - huge thank yous to all of you.

April 8, 2024
Unprompted review
Rated 5 out of 5 stars

Home improvements

My partner and I are over the moon With our home improvements.
Chris and his team from the off were fully professional and knowledgeable and assisted us in getting this just right for our home project.
I would use koncept again and again and would recommend highly,
Thanks to you all for making our home our forever home

February 1, 2024
Unprompted review
Rated 5 out of 5 stars

We recently had a new front door…

We recently had a new front door fitted. The service was amazing from start to finish, from choosing the door to fitting it. We are delighted with the result. Really professional company with such a friendly feel.

October 9, 2023
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Rated 5 out of 5 stars

Great work

One day, the Koncept van was pass by, I Google this company and try to make an inquiry for a composite door. From making appointments to the door installation which only take a month. It was suprised me (I thought it will take 2-3months to wait for the door delivery).
I had spent over a year to look for the right company, right door, right price. As the 1st impression and quotation, I have no doubt to choose Koncept.
The installation terms were very polite and gentle, they do the installation very efficient & effective.
The door is very beautiful, my family love it.
Thanks Koncept team.

July 31, 2023
Unprompted review
Rated 4 out of 5 stars

Thanks for your good service and work

Koncept installed a front door for us in January at our new house.

We spoke to Dan at the showroom Phil did the installation for us.

We are very pleased so far with the quality of the door and installation. They had good attention to detail and were up front about timescales and issues viewing the product in the showroom (due to them moving a showroom to another location)

February 3, 2023
Unprompted review
Rated 5 out of 5 stars

Supply & fitting of sliding doors

Koncept Home Improvements supplied & fitted two sets of Origin sliding doors & a side door.
It has been an extremely good experience from the initial contact to fitting. Their wealth of knowledge helped me select the appropriate specifications for my project & during the fitting process I was updated constantly on the progress. I would definitely recommend & use again without hesitation, Koncept Home Improvements.

October 19, 2022
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Rated 5 out of 5 stars

front door

We purchased our front door through Chris at Koncept Improvements. Chris was very helpful in choosing the style of door that would “suit” the house. I wanted door furnishings which did not automatically come with the door and Chris sorted these out too. Delivery was easy and we had the door installed by our builder who was doing all the other work. Now nearly 1 year later, I asked Chris if he could have a look at the door as we had to slam it shut as it didn’t close properly. Despite the fact that he did not install the door, he sent someone out within a week and it was fixed within fifteen minutes at no cost. Fantastic customer service. Happy to recommend. Great service and nice people to deal with.

January 19, 2021
Unprompted review
Rated 5 out of 5 stars

Service as great as the product

From Chris personally coming all the way to East London to take measurements on a weekend, to the lovely Phil carrying out the installation with a smile, the service has been exemplary. I now have a super secure draught-free front door and at Chris’ suggestion, a gorgeous glass top light with my house number etched into it. I would never have thought to do this and I love it. Thank you.

September 17, 2019
Unprompted review
Rated 5 out of 5 stars

Koncept - First Class Service - all the way

Chris and all his team were First Class throughout. From the initial digital images, Chris was patient and suggestive as I "flip flopped" my way to a final decision. Even with the internal blinds in the bifold doors, Chris upgraded to a new design that is stylish, practical and efficient. The installation team were punctual, diligent, courteous and above all, a pleasure to have in your home. Every question or query was promptly answered and the overall effect is wonderful. Couldn't be happier with our new room.

September 9, 2019
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Rated 5 out of 5 stars

Only a small order sliding patio doors…

Only a small order sliding patio doors and new windows in my granddaughters bedroom, I am so pleased with the quality and the service was good. I will definitely use Koncept again. Gil from Wokingham

August 9, 2019
Unprompted review
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Reply from Koncept Home Improvements

Hi Gil,

Thanks so much for a lovely review! It makes us very happy to hear that our customers are pleased!

We look forward to working with you again in future.

All the best,

The Koncept Team

Rated 5 out of 5 stars

New UPVC Windows and Doors

Very pleased with our new windows and french doors from Koncept - including acoustic glass at the front of the house to eliminate road noise. The team measuring and installing were professional and courteous. We had some issues with windows sitting outside of the new render (as a consequence of the old render and mock tudor), which was corrected by Chris and his team. One minor area for improvement: Coordination with other trades working on the property would be good, particularly the plasterer / renderer who often has to work alongside to provide a finish. Overall, though, Chris and his team were excellent.

May 13, 2019
Unprompted review
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Reply from Koncept Home Improvements

Hi Neil,

Thanks very much for a lovely review. I'm glad you're so pleased. Thanks also for the feedback regarding the other trades - this is all a learning curve, so it's really helpful to know where we can improve.

We look forward to working with you on the next phase of your project!

Chris

Rated 5 out of 5 stars

I had 10 windows replaced in my…

I had 10 windows replaced in my maisonette on 1st November 2018. The whole process was hassle free from start to finish and everyone I dealt with was very friendly and helpful. The installation team arrived at the time expected, which was a pleasant change and when they left, my rooms were left clean and tidy.
Simon from Whyteleafe, Surrey

November 2, 2018
Unprompted review

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