01792 845730



At Graham Mills we specialise in residential building improvement. Garage conversions, sun rooms, loft conversions & house extensions in Swansea form a large part of the construction work we carry out. Help can be given with design, planning and building regulations.

Graham Mills Building Contractors are renowned as quality builders in Swansea due to our achievements in the Master Builder of the Year Awards in 2012. We know its essential that any work we undertake is finished to the highest standard and that is why most of our work is through recommendations. Several of our satisfied customers have endorsed our work in the past and this has gained us the trusted reputation as friendly and respectable builders in Swansea.

Portfolio Items

Loft Conversions

At Graham Mills we have completed many loft conversions. On countless building projects we have built an extension to the side of a property and also converted the loft at the same time. This has shown itself to be an effective way of working, with ease of access to the loft area being an advantage. We have been awarded construction certificates and Master Builder of the Year awards, by the Federation of Master Builders, for our work.

House Extensions

We at Graham Mills have completed all types of house extensions and consider ourselves specialists in this form of construction. We can offer advice on design and organise the drawing/submission of plans if required. We have built hundreds of house extensions in Swansea so add a conservatory or even integrate an extension on to your home.

Kitchen Installations

Once the construction work is complete we can advise and organise your kitchen installation. It is important when having a fitted kitchen to use a company that can coordinate a team of tradesmen who are used to working with each other. We have organised dozens of kitchen installations in Swansea.


At Graham Mills we have the skills to complete your bathroom installation to the highest standard, with the choice of style to suit your taste and requirements. We organise the plumbing and tiling as part of the service we provide.


If required we can advise and arrange the decorating of your new extension. We only use local reliable tradesmen as part of our team who produce a quality finish.

Driveways and Paving

At the end of a building project it is the finishing touches that count so much. We at Graham Mills can provide you with a varied choice of finish to your paths and driveway.