Affordable Self-Build Garden Rooms

Discover the Ultimate in DIY Garden Rooms with Penthouse Kits- Designed for Fast, Easy Assembly Without Compromising on Quality.

Each Kit is Precision Made in the UK and Features Maintenance Free Cladding, High Performance Insulation and Double Glazed Windows & Doors.

With Flexible Layouts, Custom Sizing and Patented Pre-Wired Panels you Can Build a Warm Stylish & Energy-Efficient Space in Just a Few Days.

Backed by a 10 Year Guarantee it's the Smarter Way to Create Your Perfect Garden Office, Studio or Retreat to Suit your Space & Budget.

PREMIUM Structure

Signature SIP'S

High-Performance SIPs: Energy-Efficient, Durable Construction

Structural Insulated Panels (SIPs) offer superior insulation, strength, and long-term durability—perfect for an energy-efficient garden room or modern outdoor building.

SIPs ensure year-round comfort, reduced energy costs, and minimal maintenance.

With faster, cleaner installation, this future-proof building method delivers lasting quality and reflects our commitment to smart, reliable construction.


SIP's

  • The floor, walls and roof are constructed using structurally insulated panels (SIPs)
  • Offer highly efficient thermal values and exceptional strength.
  • The sealed panels make studios warm in the winter and cool in the summer
  • Provide good sound-proofing.

WALLS

  • Walls with 70mm EPS insulation
  • Secure fixings anywhere on the interior walls


FLOOR

  • Double joists every 600mm – one of the sturdiest garden room floors on the market
  • Gyms, workshops, or other high-impact uses
  • 305.91 to 382.39 kg/m²
  • 100mm EPS, offering excellent thermal and acoustic performance

ROOF

  • Durable EPDM rubber roofing – fully weather-resistant
  • Guttering and down pipe for efficient drainage
  • 100mm EPS for year-round comfort

ELECTRICS

  • Hidden internal electrical channelling
  • Complete electrical pack for easy setup

CLADDING

  • ToughWood™-Maintenance-free Composite cladding
  • Resistant to to mould, fungus, cracking, chipping, buckling, peeling, water & moisture
  • Built to last and look great for years with zero upkeep

BENIFITS

  • 50 year life expectancy
  • 15 size configurations available
  • Modern finish & hardwearing internal wood panelling
  • 10+ year guarantee
  • 1-3 days build time

Whether you're creating a home office, gym or creative space, the Signature SIP's room delivers long-lasting quality backed by a 10-year guarantee.

START YOUR DESIGN

MID-RANGE Structure

ToughFrame PRO

ToughFrame Pro: Affordable, Insulated Garden Room

The ToughFrame Pro Garden Room offers a cost-effective, durable solution for adding extra space to your property.

Ideal for use as a home office, gym, or retreat.

Built with a strong timber frame and full insulation in the walls, floor, and roof, it's perfect for year-round use in any weather.

WALLS

  • 60mm PIR insulation in walls

FLOOR

  • Double joists every 600mm this is one of the sturdiest garden rooms available!
  • Great for gyms, workshops and everything in-between.
  • Pressure treated floor beams
  • Foor load capacity
    305.91 to 382.39 kg/m²

ROOF

  • The roof is a durable & weather resistant EPDM rubber roof without seams or joins
  • Guttering and a down pipe are also included.

CLADDING

  • Maintenance free ToughWood™ cladding
  • Mould & fungal resistant
  • Resists cracking, chipping, buckling, peeling & more
  • Water & moisture resistant

EPS Insulation

  • Providing excellent thermal and acoustic insulation
  • 100mm insulation in floor & ceiling

START YOUR DESIGN

BUDGET STRUCTURE

ToughFrame

ToughFrame Garden Room: Our Most Budget-Friendly, Customisable Garden Building Kit

Delivered as a high-quality structural shell with durable timber framing and weather-resistant composite cladding.

Ideal for DIY garden offices, studios, or hobby spaces, Supplied without insulation or interior finishes, giving you the flexibility to add your own materials

FLOOR

  • Double joists every 600mm this is one of the sturdiest garden rooms available!
  • Great for gyms, workshops and everything in-between.
  • Foor load capacity
    305.91 to 382.39 kg/m²
  • Pressure treated floor beams

ROOF

  • The roof is a durable & weather resistant EPDM rubber roof without seams or joins.
  • Guttering and a down pipe are also included.

CLADDING

  • Maintenance free ToughWood™ cladding
  • Mould & fungal resistant
  • Resists cracking, chipping, buckling, peeling & more
  • Water & moisture resistant

BENEFITS

  • Our most affordable model
  • 50 year life expectancy
  • 15 size configurations available
  • 10+ year guarantee
  • All materials are FSC or SFI approved
  • 4-5 days build time
  • 3 weeks to manufacture

START YOUR DESIGN

Why Choose Us for Your Garden Room Project

  • Pick a Garden Room Kit That Suits Your Budget—Premium, Mid-Range, or Budget-Friendly Options Available.

  • Every Component Arrives Ready to Assemble, With Zero Waste or Guesswork.

  • No Need to Paint or Clad—Enjoy a Sleek, Finished Garden Building From Day One.

  • Maximise Your Garden Space With Smart Designs That Fit Tight Plots or Corners.

  • Enjoy a Clean, Modern Interior with Hidden Cabling For a Seamless Look.

  • Get Everything you Need in One Shipment—Delivered Across the UK.

  • Engineered for Strength and Longevity, Giving You Peace of Mind.

  • From the First Screw to the Final Finish, Our Expert Team is With You Every Step of the Way.

Build In Just 3 Days