Why Use Alltwen Builders?

Alltwen Builders are Swansea based Builders located in Pontardawe.

Our building business has been built on a clear definition of customer service and commitment. The positive results have been reflected in the growth we have achieved, and the many satisfactorily completed building jobs.

The business has gone from strength to strength and we have an excellent reputation both locally and further afield in both the domestic and commercial market. Membership of recognised trade bodies serve to re-enforce our service to customers, including an insurance backed guarantee for total peace of mind. We are able to offer the complete builders service, from grants, disabled grants Neath and Swansea, extensions and the whole range up to and including new build

2010 – 2011 – 2012 – 2013 – 2014 – 2015 – 2016 – 2017 – 2018 – 2019  Finalists

Neath Port Talbot Council Building Regulations Department  – Award for Outstanding Work


Our Services

New Build & Extension Specialists

Our reputation is built on the quality of our work in Extensions and new build homes. We have many satisfied customers, and in fact won builder of there year on one of our extyension clients.


We have carried out full house refurbishments, kitchen refurbs, bathroom refurbs etc, and are happy to quote on any type of refurbishment of kithcens and bathrooms

What Can Alltwen Builders Do For You?

Alltwen Building and Roofing South Wales have completed many contracts both in the domestic and commercial environments.

We have gained an enviable reputation within the locality and pride ourselves on our philosophy to provide a quality service to our clients.

Our lasting relationships with satisfied customers bear witness to a system that works.


Thank you so much, your boys were fantastic, on time every day, and as cleaner as I could wish for.

I am writing to tell you how happy I am with the extension you built for us. When we chose a builder it would have been so easy to have chosen badly, I am so glad that you were recommended to me, and I am writing to let you know I will be recommending you to anyone I know who is looking for building work.

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