More Space for Work, Fitness or Everyday Use
The 4.27m x 2.44m SIP garden room kit gives you a much more spacious internal layout while keeping the same practical 2.44m depth. It is ideal for customers who want extra flexibility for a proper home office, garden gym, studio or multi-purpose garden room.
Built as an insulated SIP shell kit, it offers a faster and cleaner route to a durable, thermally efficient garden room structure that you can finish to suit your own style and budget.
✔ Ready for final cladding in as little as 5 hours (shell build)
Cladding and finishing typically completed over the following 1–3 days depending on your chosen spec.
No specialist skills required – designed for straightforward DIY installation.
Tell us your insulation choice and any extras you want and we’ll send you a clear fixed-price quotation.
Get My Fixed Price Quote →We usually respond within 24 hours
Why Choose This Size
A strong upgrade for customers wanting a room that feels more substantial and flexible in everyday use.
Precision-cut SIP panels create the insulated shell much faster than many traditional building methods.
Designed for year-round use with insulated panel options from Lite through to Premium Plus.
Suitable for competent DIY customers, builders and trades wanting a practical, efficient system.
What’s Included
- Pre-cut SIP wall panels
- Pre-cut SIP roof panels
- Pre-cut SIP floor panels
- Structural splines and timber components
- Fixings pack
- Prepared front opening on this layout
What’s Not Included
- External cladding unless selected
- Roof covering unless selected
- Doors and windows unless selected
- Base or foundations
- Internal finishes and electrics
Ideal For
- Home office
- Garden gym
- Studio or hobby room
- Treatment room
- Multi-use family space
Key Details
- External size: 4.27m x 2.44m
- Kit type: Insulated SIP shell kit
- Use: Year-round garden room
- Supply area: Nationwide UK
- Options: Lite to Premium Plus
- Lead time: Typically 3–4 weeks from order confirmation
See How SIP Kits Go Together
We use the same straightforward SIP build system across our kit range. See how one of our most popular sizes progresses from shell to finished exterior.
View our full build progress example showing shell installation, breather membrane and finished external cladding.
View Build Process →Popular Optional Extras
Add the finishing items you need to move from SIP shell to completed garden room.
EPDM Rubber Roof Kit
Durable, low-maintenance weatherproof roof finish.
External Cladding
Choose the outside finish to suit your style and budget.
Sliding Patio Doors
A popular upgrade for light, access and a modern appearance.
Frequently Asked Questions
Is this supplied fully finished?
No. This is supplied as an insulated SIP shell kit. Cladding, roof covering, glazing and internal finishes can be added separately or quoted as extras.
How quickly can this size be installed?
Once the base is prepared, the SIP shell can be assembled much faster than many traditional building methods and can be ready for final cladding in as little as 5 hours.
Do I need planning permission?
Many garden rooms fall under permitted development, but it depends on size, height, use and location. Always check your own requirements before ordering.
You can check the official guidance here: Planning Portal – Outbuildings Guide
Is it difficult to build?
No. The panels are pre-cut and designed to slot together. Most competent DIY customers or trades can assemble the shell quickly.
Get a Fixed Price Quote for This Kit
Tell us your preferred insulation option and any extras you want, and we’ll send you a clear quotation for your 4.27m x 2.44m SIP garden room kit.
Limited production slots available each month — secure your place early
Get My Fixed Price Quote →We usually respond within 24 hours