Our Most Popular Garden Room Kit
The 3.66m x 2.44m SIP garden room kit is our most commonly chosen size, giving you a practical and comfortable internal space without stepping into a much larger footprint. It is ideal for home offices, studios and multi-use garden rooms.
✔ 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 This Size Is So Popular
Large enough to feel like a proper room for work, leisure or exercise, while still fitting many standard gardens.
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: 3.66m 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
Ready for Final Cladding in Just 5 Hours
See how quickly your SIP garden room shell goes together. In just 5 hours, the structure can be ready for breather membrane, final cladding and finishing.
Two people. One day. Your SIP shell ready for final cladding.
Cladding and finishing typically completed over 1–3 days depending on your chosen specification.
Step 1: SIP panels installed to form the shell
Step 2: Breather membrane applied for weather protection
Step 3: Thermowood cladding and trims installed for a premium finish
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, SIP panels can be assembled much faster than many traditional building methods.
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 3.66m 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