At Cymraeg Construction,
building work has been at the heart of our family for generations with skills, knowledge and training passed on from one to another, with a passion for quality that shines through on every job we undertake.
Covering all of South Wales, you can be sure to rely on us to undertake any project you may have from conception to completion, we can take care of all aspects of the build including planning and skilled tradesmen in all trades, let us deal with all the complications and timings as we project manage the process to ensure everything is done correctly and to schedule all while keeping you informed every step of the way.
Please feel free to contact us for a free no obligation estimate on any work you may have.
See Our Testimonials
Julia
Flat Roof – Installation / Repair
Gareth and his team did a very good job under very difficult circumstances with torrential rain and hail, but continued until they finished the job. Gareth is a very conscientious workman.
Robin
Slate & Tiled Roof
Very punctual and efficient. The job was completed without fuss or mess. The finished job was excellent and at a very reasonable cost.
Bernard
Wooden Staircases
Polite, efficient tradesmen. Work completed to a high standard. Would highly recommend.
Our Mission
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Frequently Asked Questions
What areas do you cover?
Cymraeg Construction is based in Blackwood, South Wales. We cover the whole of Caerphilly County Borough and surrounding areas, regularly working across:
• Blackwood
• Caerphilly
• Ystrad Mynach
• Bargoed
• Newbridge
• Risca
• Pontllanfraith
• Nelson
• Hengoed
• Surrounding South Wales valleys
• Cardiff
• Newport
• Merthyr Tydfil
For larger projects, we are happy to travel further afield. Just get in touch to ask.
What type of work do you carry out?
We specialise in high-quality domestic building and renovation work, including:
• Extensions
• Full house renovations
• Kitchen installations
• Bathroom installations
• Structural alterations (RSJ work)
• Garage conversions
• Internal refurbishments
• Carpentry and joinery
• Pitched and flat roofing
• Loft conversations
• Flooring and tiling
• General building and property improvements
If your project isn’t listed, contact us — we likely still cover it.
Are you insured?
Yes. Cymraeg Construction is fully insured with Public Liability Insurance & Employer’s Liability Insurance.
This protects both our customers and our team on every job we undertake.
Do you offer guarantees on your work?
Absolutely. We stand by the quality of our work.
All workmanship is guaranteed, and we only use trusted, high-quality materials from reputable suppliers. Manufacturer warranties also apply to many of the products we install (kitchens, bathrooms, flooring, etc.).
Do you provide free quotes?
Yes. We offer free, no-obligation quotes.
We will visit your property, discuss exactly what you want, and provide a clear, detailed price with no hidden extras.
How long will my project take?
Every job is different, but we always give a realistic timescale before starting. We pride ourselves on turning up when we say we will and completing work efficiently without compromising on quality.
Will there be a lot of mess and disruption?
We understand we’re working in your home. We take care to keep work areas tidy, protect your property, and clean up at the end of each day. Respect for your home is a big part of how we work.
Who will be doing the work?
Cymraeg Construction is a small, reliable team led by Gareth. You will deal directly with the person carrying out the work — not a sales rep or middleman.
This ensures clear communication, accountability, and consistently high standards.
Do you use subcontractors?
Most work is completed by our in-house team. Where specialist trades are required (electrics, gas, etc.), we only use fully qualified and trusted tradespeople we work with regularly.
Can you help with design ideas?
Yes. If you’re unsure what will work best in your space, we’re happy to offer practical advice and ideas based on experience.
How do I book a job?
Simply get in touch by phone or message. We’ll arrange a visit, provide a quote, and agree a start date that works for you.