Home Extensions
Side returns, rear extensions and full reconfigurations — built for light, flow and long-term value.
Design-led Construction for London Homes
Refurbishments, Extensions & New-Build Homes — delivered with clarity and craftsmanship.
Rosenau Designs Ltd is a residential contractor serving London and surrounding areas. We specialise in high-quality refurbishments, home extensions, structural alterations and new-build houses for private clients.
Residential services built around private clients
Whether you’re extending, modernising, or building from the ground up, we focus on clean delivery, transparent scope, and a finished result that feels considered.
Full Refurbishments
Whole-house modernisation including kitchens, bathrooms, finishes, electrics, plumbing and insulation upgrades.
New-Build Houses
From foundations to handover — private residential new-build delivery with programme control and quality checks.
Structural alterations & steelwork
Loft conversions
Project management
Building Control coordination
Why clients choose Rosenau
Private residential work succeeds on planning, communication and disciplined site delivery. We run clear scope, a structured programme, and practical on-site standards that respect your home.
Transparent scope
Clear inclusions/exclusions and change control.
Clear inclusions/exclusions and change control.
Clean working practices
Protection, dust management and tidy sites.
Protection, dust management and tidy sites.
Predictable delivery
Programme checkpoints and regular updates.
Programme checkpoints and regular updates.
Communication was clear throughout and the site was kept exceptionally tidy. The finish quality exceeded expectations.
Planning a refurbishment, extension or new-build?
Book a consultation and we’ll confirm feasibility, outline likely scope, and propose practical next steps.