Loft conversions

Home extensions

Handyman services


Free quotes

Get affordable prices

Wide range of designs

Just a call away

What our customers are saying

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Roundhouse Builders are a family run business specialising in small, medium and large domestic extensions for over 30 years. With a wealth of knowledge and experience in all aspects of building and renovation, we have become highly respected in the industry and widely recommended by our many delighted clients.


Are you looking for a reliable and an efficient building service? Whether you need roofing or plumbing, you can place your trust in Roundhouse Building & Renovation. Our experts will provide you with impartial advice as to which service is best suited to the needs of your property. Talk to our engineers and technicians before you make your choice of service.

  • Design & planning

  • Extension specialists

  • House renovations

  • Loft & garage conversions

  • Disabled and adapted living conversions

  • Plumbing & heating

  • Electrical installations

  • Painting and decorating

  • Hard landscaping

Browse through our pictures and see how we can transform your home or office anywhere in Pontypridd or Cardiff.

  • Fully insured and guaranteed work

  • Free consultation and estimates

  • Local authority approved

  • Over 30 years of experience

  • Project management

  • All kinds of projects undertaken

Need expert advice for your building? Call us in Pontypridd. 07854 106 352

Comprehensive services

Why should you choose us?

We can provide a complete 'turnkey' service providing everything from the designs and plans, planning applications and inspections right through to the construction process. Whether it's traditional construction, modern techniques or applying the finishing touches, we have you covered. We also project manage your build for no extra cost.


Our extensive range of efficient building services are designed to suit your budget and taste accordingly. We only use high quality products to provide you with the results that will last.

When you choose Roundhouse Building & Renovation, you can enjoy a stress-free service. We'll handle all your property needs efficiently and within your set budget. Contact us today!

Affordable solutions with great quality work

Build and maintain a beautiful home