GBG Building Services Ltd

An individual approach to high-end property renovation

GBG Building Services is a prime residential main contractor delivering the refurbishment, restoration and fit-out of exceptional homes in Central and West London and Surrey. Founded in 2005 and led by Director Mariusz Gawecki BSc Hons MCIOB, we typically deliver projects from £500,000 to £5 million.

Working with interior designers
We see our role as your partner bringing your design to life exactly as drawn. We are comfortable working from your drawings, specifications and FF&E schedules, and we welcome early involvement to review buildability, lead times and cost before tender. On site, we provide sample panels and mock-ups for approval, coordinate specialist makers and suppliers, and keep you informed with regular progress reports and photos. We carry out snagging to your standard, not ours.

Our expertise

Back-to-brick refurbishment of period and Grade II listed buildings

Apartment amalgamations, extensions and structural alterations

Bespoke joinery, kitchens and furniture made to order

Stone, metalwork and specialist decorative finishes

M&E, lighting, smart-home and AV integration

Acoustic upgrades and soundproofing

Our core team of engineers, project managers and craftsmen brings decades of combined experience in complex interior fit-outs. We keep sites clean, organised, and considerate to neighbours from pre-construction to handover.

"Finding someone who combines competence, integrity, attention to detail and a genuine sense of responsibility for the finished project is rare. Marius is one of those people—and, in our experience, something of a gem in the construction world.

Let's discuss your next project: Mariusz Gawecki  BSc Hons  MCIOB – 07917 876 080 / Office: 0208 991 5700