G. D Shellam

Highly Recommended Builder In Cardiff

1 Tyn-Y-Coed Place, Cardiff, CF24 4WX Directions

   Open today 09:00 - 21:00

Why Choose Us?

Many Years Experience
Professional Advice
Bespoke Service

Business overview

G.D Shellam Building Contractors are well established builders, who have built up a first-class reputation in the building industry by successfully delivering high-quality projects

G. D Shellam is a well established building company that has built up an enviable reputation over the last 45 years. We pride ourselves on our commitment to provide a professional and efficient service at all times, whilst maintaining the highest quality of work.

We specialise in Extensions and Loft Conversions offering the complete quality building service. Respectful of our customers and building trade through word of mouth recommendations, we guarantee the bare minimum of disruption to lifestyle and property. We offer a professional service from planning & building regulation application, right the way through to final site clearance upon completion.

As recognised craftsmen we work to exacting standards only taking on one job at a time until that job is completely finished.

Please contact us for a free quote and customers reference details.

" I can't recommend them enough." Richard Davies, Cardiff


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Products & Services

Free Quotes

Free Consultation

Established Since: 1981


Block paving





Building renovations

Domestic maintenance & repair services

Fascias & soffits

Garage conversions

Home improvements

House building

House extensions

Loft conversions


Paving & driveways

Plastering & screeding


Roofing services

Wall rendering

Building Refurbishments



Paving and Driveways





  • The Guild of Builders & Contractors


Fabulous job

Don and his team did a fabulous job replacing our kitchen, bathroom and cloakroom, flat roof and re-plastering throughout. They turned up 7.30am prompt each day until the job was finished. Don showed was concerned for us to have the finish we wanted and his experience was invaluable - we are thrilled with our “new” home
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Good workers polite, pleasent and very professional .

Mr Shellam came to my home to put on a new roof, board my loft, rerender and paint my house . The quality of their work was exceptional, they always cleaned up every night and kept me informed of what they were doing at all times. They were very professional, even spoke to my neighbours to let them know what happening . I was very happy with the work they did i would use them again.
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Excellent builder with heaps of experience and expertise who never lets you down

Over the last 19 years Don has three major pieces of work for me, including a loft conversion and new extended kitchen. We always get him to come back if we contemplate any major works. And that's because everything always turns out fantastically well and his quality of work is second to none. Don does an extremely conscientious and professional job, with attention to detail. He always focuses on your job - keeping regular hours and never going off to do other jobs in between. If he says he will be there at a certain time - he is there - or he rings to let you know. And he always cleans up before he leaves. He has been in the business for 30 odd years and has accumulated a wealth of experience. He is also really considerate. When my old washing machine wouldn't fit in my new kitchen cupboard he even sent his guys off to Currys with me to get a new washing machine so he could plumb it in for me to my new kitchen! That's service!
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Very highly recommended!

Always punctual, never had any problems with his work (have used him for many jobs over the past 20 years), finishes your job before starting another, always tidy, always cleans up, and always available for advice - I wouldn't have anyone else work on my home!
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Highly recommended five star service

Don and his team have recently completed a loft conversion, with bathroom and shower, in my Roath terraced house.
The loft is finished beautifully.
Things that impressed me most : they keep regular hours daily, making it easy to plan around them.
They bring their own tea making facilities. They were a pleasure to have around, especially good with the children.
Don considers that once you are his client he must look after you. He really dvotes his time to your project and will work on your ideas. Does one job at a time.
He noticed my shower was leaking, and fixed it without charge, as well as doing other small jobs.
Completed exactly on time.
Helped me get the best price on items I needed to buy like the shower.
He doesn’t stop treating you as his client once he’s left. After the loft was finished I broke my shoulder. I needed help because I’d been in the middle of refurbishing . Don came round and built the bed I’d bought. No charge. Just kind.
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