SIP Range
Beech
Premium annexe with bedroom separation, full kitchen and bathroom — built for fully independent living.
Beech is our most complete annexe specification: a separated bedroom, full kitchen and a bathroom, all within a high-performance SIP structure built for year-round occupation.
- Roof type
- Annexe
- Footprint
- Multiple sizes
- Floor area
- from 18.9 m²
- Best for
- Independent living, long-term guest accommodation, rental annexe
Available sizes
- From 6.3m × 3m18.9 m²
- Larger sizes to orderon request
Every size can be tailored, and we build fully bespoke to your site and brief.
Key features
- Separated bedroom
- Full kitchen and bathroom
- Year-round living specification
- Eco-friendly ground screw foundations
- Eco-friendly roof options and responsibly sourced materials
- Full electrical package, lighting and heating options
Technical specification
Wall U-value
0.34 W/m²K
Exceeds Building Regulations
Roof U-value
0.26 W/m²K
Superior thermal performance
Panel thickness
97mm / 122mm
High-performance insulated core
Compliance
Part L compliant
UK Building Regulations
Air tightness
< 1 m³/hr/m²
At 50 Pascals
Installation
2–5 days
Professionally installed on site
Other designs in the range
Hazel
Mono-pitchCompact mono-pitch design, perfect for home offices and small studios. Clean lines with a contemporary aesthetic.
Birch
Duo-pitchExtended duo-pitch annexe with full self-contained living potential — multiple internal rooms.
Willow
Mono-pitchWide mono-pitch with side entry. Perfect for art studios or yoga spaces — optimised for natural light.
Start your project