Builder Cardiff is the trading name of Ever Best Building, Roofing & Carpentry — over 20 years' experience delivering house extensions, loft conversions, renovations and roofing across Cardiff.
From a single storey extension to a full renovation, we cover the building work that actually comes up for Cardiff homeowners.
Single and double storey extensions designed and built to give you real extra space, not just a bigger footprint.
Learn More →Turning unused roof space into a proper extra room, with the structural work done to full building regulations.
Learn More →Full or partial home renovations, from a single room refresh to a whole-property refurbishment.
Learn More →Leaks, slipped tiles and storm damage repaired properly, with the actual cause found and fixed.
Learn More →Full roof replacements and new roof installations, built to specification rather than rushed to the cheapest option.
Learn More →GRP, felt and rubber flat roofing for extensions, garages and outbuildings, laid to proper falls.
Learn More →Emergency callout for storm damage and sudden leaks, to stop water getting in until the permanent repair is done.
Learn More →Doors, staircases, fitted joinery and general carpentry, handled as part of a build or as standalone work.
Learn More →From bare glazing to a finished bi-fold extension — one of our recent Cardiff projects, start to finish.
With over twenty years in the building industry, we've assembled a team of experienced trades covering extensions, roofing, carpentry and general renovation. Our focus is reliability and seeing the work through to completion at a high standard, with customer satisfaction at the heart of what we do.
“Reasonable pricing, reliable and did a great job. Would use them again for future projects.”
“Converted our integrated garage into another sitting room. We're very happy with the standard of the work, and we were kept updated on progress throughout.”
“Re-covered a leaky flat roof outbuilding, knocked down a wall, insulated and plasterboarded the space and levelled the floor. It looks so much better and came in ahead of schedule.”
4.7 out of 5 from 15 reviews on Yell. Reviews paraphrased from verified customer feedback.
We support you through planning and Building Regulations applications where they're needed, and can advise early on whether your project is likely to need full planning or fall under permitted development.
A single storey extension typically takes 8 to 12 weeks depending on size and complexity, and a double storey extension longer. We'll give you a realistic timeframe once we've seen the property and agreed the scope.
It depends on the specific roof structure — some properties suit a straightforward conversion, others need a dormer or roofline alteration to get enough head height. We'll assess this properly during survey rather than guessing from photos.
Yes, for storm damage or a sudden leak we prioritise making the roof safe and watertight as quickly as we can, then agree the permanent repair separately.
Yes, we cover Cardiff and the surrounding area — see our full coverage page for the areas we work in regularly.
Call us on 07476 310974 or drop an email, and we'll arrange a time to see the property and talk through what you're after.