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Sean Griffiths comes from a lineage of traditional builders, his father, grandfather and great-grandfather were all master builders before him. After achieving a distinction in City & Guilds Construction in the early ’90s and working on multiple housing developments, Sean Griffiths and his wife Cheryl founded SG Build in 1999.
The company’s beginnings were modest, run out of their two-bedroom flat in Crawley. Today the team has grown to 6 skilled craftsmen, still working the same way: turning up, doing the job properly, and treating every client’s home like it matters.
Also: Concrete supply and delivery, Floor screed services, Loft conversions.
Quality construction building work, from floors, walls and ceilings to major structural alterations, carried out with the same pride SG Build puts into every job.
Learn moreAs a family grows, so does the need for space, a new baby, or room for an open-plan kitchen diner. SG Build handles the extension from first dig to final finish.
Learn moreThe preparation work to sub-surfaces prior to construction, including landscaping outdoor spaces, ready for whatever gets built on top.
Learn moreThis estimate is based on a single storey extension. It is important to note costs vary depending on multiple factors. This tool is intended as a rough guide only. For an accurate quote please call to arrange a home visit.
A few jobs from around Crawley and West Sussex.






“SG Build did such a great job on our driveway we knew they had to do our garden too. They had great ideas and made it look amazing. We are so pleased with the outcome. I cannot recommend them enough.”
“Used Sean for several building jobs at Ifield Park Care Home. Sean is friendly, polite and has sound knowledge. Nothing is ever too much trouble. We would recommend Sean for any aspect of building work.”
“Sean & his team were extremely hard working, a delight to work with, honest & reliable. We are very pleased with the standard of work & the way Sean managed the entire project, nothing was too much trouble. We have no hesitation in recommending them to anyone.”
“From day one Sean and the team took away all the stress and anxiety that had been building alongside the excitement and prospect undertaking our long awaited extension. The whole build ran like clockwork. Sean and his team were all really professional and lovely to work with. We cannot thank you enough for everything you've done for us.”
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Crawley, Northgate, Southgate, West Green, Horsham, Copthorne, Ifield, Gossops Green, Maidenbower, Furnace Green, Three Bridges, Tilgate, and the surrounding areas.
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