This is what SGS does best. Complex structural builds, full loft conversions and ground-floor extensions — delivered on time, on budget, with every trade managed under one roof. No surprises, no handoffs.
Extensions and loft conversions are the most impactful and complex improvements you can make to a home. SGS has spent over 20 years mastering exactly this — structural builds that add serious value and genuinely change how you live.
Single-storey rear and side extensions — designed and built to planning permission, on budget.
Full loft conversions with dormer windows, Velux skylights, staircases and full fit-out.
Steel beams, load-bearing walls removed, internal reconfigurations — done properly, safely.
SGS co-ordinates architects, groundworkers, bricklayers, roofers, electricians and plumbers.








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