Company director and your main point of contact — not a call centre. Book a visit and speak with the team that will deliver your project.
Cardiff
Cardiff & South Wales
Unlock your home's potential with our stress-free service. Garage conversions, small extensions and garden landscaping — with full Building Regulations support from a team that is small enough to listen, big enough to deliver.
Years Trading
Garage Conversions In 18 Months
Social Followers
Weeks Typical Build
About Lewis & SonFounded as a landscaping business six years ago, Lewis & Son has grown into Cardiff's go-to specialist for garage conversions, small extensions and new-build garden landscaping.
We work only with domestic homeowners, and we are owned and run by Christian Lewis — small enough to listen, big enough to deliver. Read our full story on the About Us page.
Recent Conversions
Our Services
Turn cold, unused garage space into a warm family room, bedroom or home office — typically completed in 4–5 weeks with insulation, electrics and a finish you will love. We handle Building Regulations and keep the process stress-free from first visit to handover.
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Add kitchen, dining or living space with a single-storey extension designed to suit your Cardiff home. Clear quoting, coordinated trades and building control sign-off — delivered with the same care we bring to every garage conversion.
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Complete garden transformations for new builds and established homes across South Wales. Practical layouts, quality hard landscaping and planting chosen for year-round use — rooted in our landscaping heritage.
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We liaise with building control on your behalf so structural work, fire safety and insulation meet current regulations. You get compliant, certificated work without navigating paperwork alone.
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Not sure how to use your garage or where an extension should sit? We advise on layout, light and flow so your investment works for everyday life — before a single brick is laid.
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One team from consultation to completion: quoting, scheduling, trades and snagging under Christian Lewis's direct oversight. Small enough to listen, big enough to deliver your whole project.
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An integral garage in Cardiff became a light-filled family room — fully insulated, re-wired and signed off through building control in under five weeks.
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A single-storey rear extension opened the kitchen to the garden, with matching brickwork and a interior finish that feels as though it was always part of the home.
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Complete landscaping for a new-build property: level lawn, patio for entertaining and planting suited to the Welsh climate — ready for family use from day one.
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A detached garage near Cardiff was converted into a dual-purpose gym and quiet workspace, with premium flooring, heating and electrics throughout.
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Former garage space transformed into a well-insulated home office with natural light and data points — ideal for hybrid working without losing a bedroom.
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Unused garage volume converted into a comfortable guest bedroom with proper insulation, heating and fire safety — adding flexible accommodation for growing families in South Wales.
Get A Quote How We WorkOur consultation process gives you a clear roadmap for your build transformation — from first enquiry through to agreed start date.
Complete our consultation form with your requirements so we understand your project before we visit.
We arrange a visit, listen to your ideas, answer questions, and provide a full detailed breakdown quote.
We agree a start date and get to work — stress-free delivery from a team you can trust.
Our PromiseOne point of contact. Clear communication. Exceptional standards of work. Peace of mind. Do not just take our word for it — here is what homeowners across South Wales say about working with us.
Why Choose usLewis & Son Construction Ltd is owned and run by Christian Lewis. You work with the owners and their hands-on team across Cardiff and South Wales — garage conversions, extensions and landscaping delivered to a standard you can see in every detail.
Company director and your main point of contact — not a call centre. Book a visit and speak with the team that will deliver your project.
One point of contact from consultation to completion. We coordinate trades, building control and timelines so you can focus on family life.
50K+ followers and hundreds of five-star reviews from homeowners who chose a local team that is small enough to listen, big enough to deliver.
Testimonials
“Christian and the team turned our integral garage into a beautiful home office. The quote was clear, the site was tidy, and the finish feels truly premium — professional from start to finish.”
Cardiff
“From the first site visit to handover, communication was excellent. The quote was detailed, we were kept updated throughout, and the finish surpassed what we hoped for. We would choose Lewis & Son again without hesitation.”
South Wales
“They managed building control, coordinated every trade, and kept the site tidy throughout. Our small extension flows seamlessly from the existing house — it genuinely feels as though it was always there.”
Cardiff
“Lewis & Son understood exactly how we wanted to use the garden. The landscaping is practical and beautiful — a space the whole family enjoys. True craftsmen who take pride in their work.”
South Wales
Ideas & InspirationMost garages are only used for storage. Here are the most popular ways our South Wales clients transform theirs.
A quiet, well-insulated workspace with proper lighting, data points and heating — ideal for hybrid working without giving up a bedroom.
Add a ground-floor bedroom with fire-safe construction, insulation and ventilation that meets Building Regulations.
A warm, safe space for toys, homework and friends so the living room can stay tidy.
Durable flooring, strong electrics and good ventilation — train at home any time of year.
Washer, dryer, storage and boot space moved out of the kitchen and into a purpose-built room.
An extra living area for movie nights, hobbies or teenagers who need their own space.
Knock through into the existing house for a larger kitchen-diner or living space that feels original.
A cosy reading room, music space or creative studio tailored entirely to how you live.