GreenCastle Home Improvements Reviews 

Was recommended by a parent who previously had work done (and a great job was done by them in their house) and Derek came round to quote for us. He couldn’t have been better and gave us some superb options, and the end price was fantastic. Couldn’t be happier.

David came round at the agreed time and measured all windows and was very kind and explained the full process to myself and partner and managed to give us a very good quote for full new set of windows for the full house.

Derek couldn’t have been more helpful. Went through and explained everything to a fine T. Would definitely recommend and use again.

Derek was fantastic from the moment he chapped our door.
He was very friendly and he went through everything with us and we loved that we could pick the designs right down to the handles!
The price was excellent and more importantly we felt listened too and supported
We can’t wait to have our new windows and doors.

Derek came and gave us a quotation for a new front door earlier today. We were getting several quotes from different companies to compare. The result being a couple of hours after Derek leaving, we were on the phone ordering not only a door but a new window as well. Derek was professional from the moment he stepped into our home. He knew exactly what we were looking for - no sales patter - no fuss - just straight talking facts and calculations and that is why he stood out from all the rest!. Thanks Derek, it really was a pleasure doing business with you and we will be doing business again in the future.

We are very happy with our experience! Derek was our point of contact — friendly, professional, and very helpful throughout the whole process. The results were great, and we’ve already invited him back to do the rest of the flat. Highly recommend!

I had my master bedroom window replaced by Greencastle this summer and it’s the best home improvement I’ve ever had done! The old window had been letting in a lot of cold draughts and outside noise, so a no-brainer to replace. Derek the super sales consultant could not have been more helpful and patient. He kindly checked my other windows and doors, advising when each was likely to need replacing. So no hard sell at all.
I’d previously had a much more expensive estimate from a well-known company, who told me that the windowsill would be damaged when the old window was removed, so would need to be replaced. But the nice surveyor from Greencastle reassured me that he would expect any damage to the sill to be very minimal and he was right - barely a scuff, no rush to get the paintbrush out! The fitter was excellent, tidy and efficient. He put down dust sheets, carefully dismantled the old window from the inside of the room and cleaned up afterwards.
The new window looks lovely and the noise reduction (from traffic, neighbour dogs, cats, foxes) is amazing. I barely heard the recent storm and am enjoying a much cosier bedroom now the colder weather is upon us. It’s a 10/10 for Greencastle from me! I have now ordered a replacement composite front door and am looking forward to having that installed.

Placed order in May 2025, signed contract and paid a deposit for a new door/sidescreens and they were quick to send out the surveyor (Tommy) within a week of this. Tommy was great taking all my requests down and taking measurements confirming everything I wanted. I then received an updated contract to sign weeks later. Then I didn't hear anything from Greencastle for a few weeks until towards end of June where they told me that my order was at manufacturers but the latch was needing changed which I agreed to (wish I hadn't now - cheap thumb turn not drop latch). Then I didn't hear anything again for weeks. I decided to contact them around beginning of August for an update and they gave an excuse that the glass design I ordered was going to take another two weeks. About a month and a bit later I still hadn't heard anything and so again I contacted them and at that point in September I was given a date for installation (2 weeks later). On the actual day of installation I received a phone call to say that the workmen weren't going to make it and my frame was damaged which they noticed when loading on the van that morning. (This meant that they didn't Qaulity Check the items at manufacturing stage) and I was angry so I emailed a written complaint which wasn't acknowledged. At the end of September I still hadn't heard anything so I enquired yet again about my order and was eventually given info that my new frame would be in showroom around October which it was and they booked me in for an installation date on the 10th October. Finally the day arrived and the workmen turned up and got on with the job. They weren't chatty guys but they did complete the job with minimal mess and then ran off when finished. Within 20mins I missed a call from Greencastle asking for payment and I hadn't even had time to check the workmanship of the door in that short period of time with the guys leaving and getting that call. Anyway payment was sent and I asked for an acknowledgment of receipt which wasn't given to me either.
I feel that it shouldn't have taken 5 months from start to finish to get my door installed and I am extremely disappointed in the length of time it took to get it installed. I also don't think much of the Customer Service as I had to do all the chasing and wasn't given enough time to inspect the finished installation of my door before chasing for payment same day. Also they definitely didn't QC the door after it was manufactured or else the damaged frame would have been picked up before the actual installation date.one thing that they got wrong was that they put the hinges on door on the wrong side so door is opening in on wrong side. This should have been taken from survey but clearly wasn’t.
I would NOT recommend this company because of the length of time they took, no QC done and CS awful.

After having 3 extremely varying quotes from different companies for doors, one of my usual workmen suggested I tried Greencastle. Derek came our to give me a quote, he was friendly and professional and not pushy at all. He provided me with various brochure options and was able to show me an example of a composite door which in the end I decided to go for. The quote was the best out of all I received and the quality of the sample he brought seemed great. So far I am happy with the service Derek provided, I had multiple questions about the doors which he was able to answer for me without any issues. The aftercare package of 15 year guarantee for the doors was excellent and superior to other quotes. He made me feel at ease and understood my needs and concerns and assured me that if I have any issues I can contact him directly to resolve them. Looking forward to having the new doors installed.

We are very pleased with our current cooperation with Derek from GreenCastle... the talks went smoothly, despite our many questions, Derek was very helpful and understanding, he didn't pressure us into anything, on the contrary, he advised us in the best possible way... I recommend him 😉

Derek came out and was very friendly and professional. listened to what we wanted and helped us decide on the design of windows and doors.
The fitters, Adam and Kenny have made an absolutely fantastic job of fitting the windows and doors to an extremely high standard cleaning up after themselves. Really happy with the work done.

I had the pleasure to have Derek quoting me for windows. Very knowledgeable about the business, he explained everything very efficiently. He was not pushy at all and made it very easy for me to decide what i want. 10/10

Had Derek up to give me a quote. He kept me fully informed throughout the whole visit. Just simple facts and figures. No hard selling tactics which definitely made it a pleasant experience. Even came back with an amended quote when I changed my mind. Glad I enquired

Fantastic service from Derek Reilly today. Derek took the time to listen to what I needed. Didn’t push anything, no sneaky sales tactics. Explained everything really clearly and was obviously invested in what I and my family needed. Would highly recommend him and the company.

Derek came round to give a quote for windows and a door. He was very professional, friendly and efficient. We were given all options and discussed what worked best for us. We went ahead and purchased the windows and door because it was a deal we could not refuse. 1st class service, thank you.

Had Muir and Rhys fitting windows in my grandmothers big old house, they were very accommodating to my grandmothers Ill health, made everyone feel at ease, kept us updated as the job was going on and a total pleasure to have in the house. They left no mess, done an excellent job and got 18 huge windows in very fast. We are hoping to replace front and back doors in near future and would absolutely use again. Thank you 🌟

Derek was very friendly not pushy made sure myself and my husband were included in everything he was saying and doing. Really didn't feel any hard sell from him at all. Explained everything very clearly how things worked regarding how project can be financed . Very pleased with quote . Feel he became a friend rather than a sales person .

I got in touch with this company two years ago to get a quote for new windows and doors. I met Derek who was a very outgoing and professional guy and he got me the best price possible but unfortunately I wasn’t able to go ahead due to my financial situation.
I promised Derek I would be in touch when the time was right which he accepted. He didn’t hound me like other companies usually do.
I got in touch with Derek a few days ago and explained I was now able to go ahead with the windows and doors and would he be able to come out and give me another quote. Derek remembered who I was and got me fitted in for a visit to measure up and go through prices. Again Derek was extremely professional he explained everything really well and went through all financial options that he thought would be best for me. He said at no point did I have to go ahead with anything if I decided it wasn’t the right price or time for me. We had a great catch up with everything that has happened the past two years it was like seeing an old friend. Derek again got me a great price and I signed on the dotted line and can’t wait to get my windows and doors installed.

Very professional. All aspects were explained thoroughly and we felt under no pressure whatsoever.

I had a fair idea of what I was looking for and Derek gave me a look at what was available. I am extremely happy with my choice. Derek was very informative but didn't push my decisions. I am looking forward to my door being installed so very much