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1st April 2022 - Installed by our team - 5m x 4m Insulated Garden Office in Kent - Another happy customer!

Our Clifton 5m x 4m Garden Office featuring 40mm KingSpan insulated walls, roof and floor and 13" Height Increase installed by our team of experts. Another very happy customer!

 5m x 4m (16ft x 13ft) Insulated 64mm Pressure Treated Garden Office + Free Installation

Clifton Insulated Garden Offices: 5m x 4m (16ft x 13ft) Insulated 64mm Pressure Treated Garden Office + Free Installation

RRP : £23,244.33
Only £16,141.90
Save : £7,102.43 (31%)

5m x 4m (16ft x 13ft) INSULATED 64mm PRESSURE TREATED GARDEN OFFICE + FREE INSTALLATION - 64mm Walls, Floor and Roof  (12mm (T&G) + 40mm Insulated EcoTherm + 12mm T&G) - Double Glazed Safety Toughened Windows (4mm - 6mm - 4mm) + EPDM Roof + FREE INSTALL


BESPOKE SERVICE – As we manufacture this product to order - we are able to amend and tweak your design to your specifications. Please call us for further information and a quote.

Visit our Factory to see us manufacturing a Garden Room. Our staff will happily show you around the product. We pre-build all our buildings prior to delivery and send you a video to make sure you are 100% happy with the product prior to us shipping your goods.


This stunning 5m x 4m Insulated Garden Office offers a modern building that is both practical and stylish. You can position the panels of the building to your specification, moving windows and walls to your requirements giving you a bespoke building. The windows of this garden room are double glazed, with two of the glazed panels including opening top windows.

EcoTherm is a high performance insulation with a fibre-free rigid thermoset polyisocyanurate (PIR) core.

It is used to insulate solid concrete and suspended timber ground floors, and has a thermal conductivity of 0.022 W/mK.

The price of this item includes full installation of the building into your garden. A firm and level base is required for this, we recommend either solid concrete or concrete slabs. It is recommended that the floor of this garden room is further covered by either carpet or laminate to reduce wear on the match boards.

Please Note: These Insulated Garden Offices are Pressure Treated but not painted. Although Pressure Treated you will need apply and an application of wood preservative which is not part of the home installation service. In order to qualify for our 15 year anti-rot guarantee the building must be annually treated with a high quality spirit based wood preservative.

Key Features

  • 5m x 4m Insulated 64mm Garden Office 
  • Includes Free Installation
  • Pressure Treated
  • Double Doors
  • EPDM Roofing - Synthetic Rubber Roof Covering
  • Great Garden Office for small spaces
  • Under 2.5m in Height - No Planning Permission Required
  • Fully Double Glazed, 14mm thick Argon filled double glazed units
  • Fully Insulated Roof, Floor and Walls
  • 64mm thick, double skinned and insulated plain panels
  • 64mm thick Walls, Floor and Roof (12mm T&G - 40mm EcoTherm - 12mm T&G)
  • EcoTherm is a high performance insulation
  • Thermal conductivity of 0.022 W/mK.
  • Toughened Safety Glass
  • 38mm x 63mm CLS Rounded Framing
  • Fully modular design, allowing fully customisable placement of panels, doors and windows
  • Additional Windows, doors and plain panels can be added if required. Please call us for detail
  • 15 Year Anti-Rot Warranty
  • FREE Mainland UK Delivery

We offer an array of additional bespoke extras and upgrades to suit your garden building, ranging from timber upgrades to ground works and electrics. 

Optional Extras:

  • Bespoke Sizes
  • Concrete Bases
  • Paving Slab Bases
  • Timber Painting & Treatment
  • Building Installation service
  • Base Depth: 4138mm (13'6")
  • Base Width: 5137mm (16'10")
  • Double Door Height: 1875mm (6'1")
  • Double Door Width: 1525mm (4'11")
  • External Depth: 4247mm (14'9") + 600mm (1'11") Overhang
  • External Eaves Height: 2210mm (87'')
  • External Ridge Height: 2337mm (92'')
  • External Width: 5176mm (16'11")
  • Floor Bearers: 44x44mm
  • Floor Bearers Direction: Front to back
  • Front Overhang: 600mm (1'11")
  • Internal Depth: 3966mm (13')
  • Internal Eaves Height: 2032mm (80'')
  • Internal Middle Height: 2082mm (82'')
  • Internal Ridge Height: 2159mm (85'')
  • Internal Width: 4966mm (16'3")