About Lewis & SonLewis and Son Construction Ltd is based in Cardiff and has been trading for 6 years. Founded as a landscaping business, we have evolved and niched into garage conversions, small extensions and new-build garden landscaping — work that adds real, everyday living space for families across South Wales.
In the last 18 months we have completed 20+ garage conversions, becoming Cardiff's clear specialist in this space. We serve domestic homeowners exclusively: whether you need a home office, extra bedroom, gym, utility room or open-plan family space, we guide you from first consultation through Building Regulations to a clean, finished handover.
The business is owned and run by Christian Lewis. With 50,000+ followers on Instagram and Facebook, Lewis & Son is one of the most recognisable trade brands in South Wales — small enough to listen, big enough to deliver.
Recent Conversions
Our LeadershipChristian Lewis owns and runs Lewis and Son Construction Ltd from Cardiff. What began as a landscaping business has become South Wales' go-to specialist for garage conversions, small extensions and new-build garden landscaping — always for domestic homeowners, never faceless volume builds.
You deal with Christian and his hands-on team from the first consultation to the final snag. That is the difference behind our promise: small enough to listen, big enough to deliver.
Years Trading
Garage Conversions In 18 Months
Social Followers
Typical Conversion Time
Our JourneyLewis and Son began as a landscaping company, building patios, lawns and gardens for local families. That is where we learned to love hands-on work and to take pride in a clean finish.
Homeowners kept asking what to do with an unused garage. We listened, learned the regulations inside out and began converting garages into rooms families genuinely use.
With 20+ conversions completed in the last 18 months, plus small extensions and new-build garden landscaping, we are one of Cardiff's most recognised home-improvement names — and a community of 50,000+ followers online.
Our ValuesSmall enough to listen, big enough to deliver is more than a slogan — it is how every job is run.
What's IncludedEvery conversion or extension is delivered as a complete service, so you are never chasing separate trades or paperwork.
The CrewWhen you book Lewis & Son you get the same faces from the first site visit to the final handover. Our small, hands-on crew keeps work consistent, communication simple and standards high.