A One Home Improvements based in swansea provide customers all over the country with the highest quality, sustainable windows, doors, and conservatories. All of our installers are fully qualified to the higest standard to ensure whatever product they are installing it is guarenteed to last, fitted professionally and absolute customer satisfaction is achieved.

Composite Decking and Fencing

NEW! Composite Decking & Fencing

Future proof, Low Maintenance

Our composite decking and fencing is hard-wearing and easy to maintain. The composite material used in their construction means the boards do not rot, splinter, or warp like many traditional timber boards and easily kept clean by sweeping or use of the occasional jet wash.

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10 Years Warranty

All of our windows, doors and conservatories come with a massive
10 Year warranty!

Additionally for ultimate peace of mind all guarantees are independently underwritten by the PWF (plastic window federation)

Dedicated fitting teams across wales

Our Working Areas

Excellent Customer Feedback



"We have had two lots of work carried out by A one. First time included box sash frames which we had been told were really expensive and difficult to source and fit by other companies. A one were very reasonably priced and made fitting them seem easy!"



"Well what can I say, Thank you very very much for the fantastic job you have done on our new windows. They look stunning and the job is perfect. Justin very curtious young man did an outstanding job to the highest of quality thank you Justin."



"Absolute gem of a company. From start to finish, I cannot fault A One Windows. Not only was the price good, but the estimated completion date was 8 weeks quicker. Very highly recommended by two very happy customers"



"I had patio doors fitted this morning, very pleased with them. Excellent service and very pleasant work men. Would recommend this company and will use them in the future."

Jim Kenchington


"We had new windows fitted in 2015 which we were very pleased with, excellent service form beginning to end. Last week we had a new door fitted and what more can I say, excellent quality with a clean and professional job done once again."



"I have just had my lovely new front door and french door by A-One. I cant say enough for the standard of the product the difference in heat insulation with new french doors has been fantastic throughout the winter. The fitters were very professional."



"Used A one for all new windows throughout my house. A lovely composit door, and knocking through my kitchen wall for an open plan kitching and dining room. Have to say i couldnt be more impressed. Cant thank them enough and will be using them for all future projects."

Seiriol James


"It pays to have local suppliers. AOne built our conservatory to budget and on schedule. A professional service with quality materials and more cost effective than the national suppliers."

Jen Bradshaw


Amazing service!! From initial enquiry right through to complete installation the guys were all great. House now looks fantastic and will definitely be using them again for any further extensions we have. All round excellent service, product and would highly recommend to anyone.



This is the second time I've used A One and they have been very good on both occasions. They turned up on time and were very efficient and friendly.A pleasure to do business with.



We used them for an old sash window replacement that another manufacturer had great trouble sorting out and found Aone prompt, neat and reliable. I would highly recommend them and we are going to use them for a repacement window for my son too.



From start to finish dealing with A One has been a joy. Mark was the sort of salesman that you'd always hope for, and he certainly knows his stuff. Dai and Pete did a phenomenal job on the fitting, and the installation has transformed the property.



Can't not fault the service. I would recommend this company to anyone wanting any home improvements. Next year we are looking to have decking in our garden. We will definitely be using A-One for this too.



I just want to say how pleased I was with AOne home improvements. The fitters were very professional, friendly, tidy and nothing was too much for them. One would not have known there had been any work undertaken as everything was left clean and tidy Thank you so much.

Frank Penny


Brilliant service, first class tripple glazing, Bay window and composite front door. Changed the look of the house completely. Fitting by a friendly and professional team, Misters Clean & Tidy! No hassle sales process. Very happy and even happier wife

4,450 Orders in Wales

We are Open 6 days a week

Over 9 Years trading