Design | Build | Sustain

SIP Home Extensions

Extend your home with a lightweight, accurate and thermally efficient SIP structure.

Suitable extension types

Rear extensions

Open-plan kitchens, dining rooms and family spaces with wide garden connections.

Side and wraparound extensions

Maximise underused side returns and reorganise the ground floor.

First-floor additions

Lightweight panel construction can be advantageous where loads and access need careful control.

SIP roofs and infill structures

Highly insulated roofs, gables and structural envelopes integrated with existing buildings.

Integration with the existing home

Extension projects require careful survey and engineering work. We consider existing foundations, wall construction, drainage, roof geometry, movement, temporary support and the size of new structural openings. SIPs are then detailed as part of the overall structural design rather than treated as an isolated product.

What we provide

Our service can cover feasibility, architectural design, planning, Building Regulations, structural calculations, panel detailing, manufacture, delivery and erection. We can work directly with homeowners or alongside an appointed architect, engineer or main contractor.

Start your project

Ready to create your room beyond?

Send us your ideas, drawings or site details for an initial project review.

Talk to Room Beyond

Room Beyond AssistantAI-powered initial guidance
Welcome to Room Beyond. I can help with initial questions about SIP garden rooms, annexes and extensions. What space are you hoping to create?

AI responses may be inaccurate. Project-specific design and approvals require professional review.