Insulated Garden Rooms

The innovative way to increase your living space

  • Cost effective extension and conservatory alternative
  • Insulated 140mm walls, 65mm roofing, 40mm floor
  • 28mm double glazed windows and doors
  • Easy build DIY panel system for quicker install
  • Secure, Industry leading 12-point locking system
  • Composite exterior walls. Low maintenance & durable
  • 10 year guarantee on pressure treated bearers

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Insulated Garden Rooms Insulated Garden Rooms
Responsibly Sourced Timbers Responsibly Sourced Timber
Experienced Garden Buildings Company 30+ Years Experience
10 year pressure treated timber guarantee 10 Year Guarantee*
Free delivery on most orders Free Delivery on Most Orders
UK based Company UK Based Company

Insulated Garden Rooms

For a quick, easy and cost-effective way to create extra living space, invest in insulated garden rooms. Extra room without the hassles of messy building work or the stress of moving house. Double glazed and fully insulated with high quality materials, for a comfortable space all year round.

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Only 25% Deposit is needed for Dunster House Online Orders

Insulated Garden Rooms

For a quick, easy and cost-effective way to create extra living space, invest in insulated garden rooms. Extra room without the hassles of messy building work or the stress of moving house. Double glazed and fully insulated with high quality materials, for a comfortable space all year round.

Showing 37-48 of 121 products
Dominator Pressure Treated Garden Office - Glazed
January Sale
Dominator Pressure Treated Garden Office – Glazed
W4.5m x D3.5m / W15' x D10'
From £8,444.99 £12,989.99
Save £4,545
Dominator Pressure Treated Garden Office - Glazed
January Sale
Dominator Pressure Treated Garden Office – Glazed
W5.5m x D2.5m / W18' x D8'
From £8,454.99 £13,004.99
Save £4,550
Dominator Pressure Treated Garden Office - Glazed
January Sale
Dominator Pressure Treated Garden Office – Glazed
W7.5m x D3.5m / W24' x D10'
From £11,974.99 £18,419.99
Save £6,445
Dominator Pressure Treated Garden Office - Solid
January Sale
Dominator Pressure Treated Garden Office – Solid
W3.5m x D2.5m / W11' x D8'
From £5,954.99 £9,164.99
Save £3,210
Dominator Pressure Treated Garden Office - Solid
January Sale
Dominator Pressure Treated Garden Office – Solid
W5.5m x D3.5m / W18' x D10'
From £9,584.99 £14,749.99
Save £5,165
Dominator Pressure Treated Garden Office - Solid
January Sale
Dominator Pressure Treated Garden Office – Solid
W4.5m x D2.5m / W14' x D8'
From £7,084.99 £10,899.99
Save £3,815
Dominator Pressure Treated Garden Office - Solid
January Sale
Dominator Pressure Treated Garden Office – Solid
W4.5m x D3.5m / W15' x D10'
From £8,274.99 £12,734.99
Save £4,460
Dominator Pressure Treated Garden Office - Solid
January Sale
Dominator Pressure Treated Garden Office – Solid
W5.5m x D2.5m / W18' x D8'
From £8,284.99 £12,749.99
Save £4,465
Dominator Pressure Treated Garden Office - Solid
January Sale
Dominator Pressure Treated Garden Office – Solid
W7.5m x D3.5m / W24' x D10'
From £11,804.99 £18,164.99
Save £6,360
Terminator with uPVC INSULATED Log Cabin
new product sash
Terminator with uPVC INSULATED Log Cabin
W5m x D3m / W16' x D10'
Insulated 62mm Wall, Equivalent to 140mm U-Value
From £5,909.99 £9,089.99
Save £3,180
Addroom® Conservatory Alternative
January Sale
Addroom® Conservatory Alternative
W5m x D2.5m / W16'6" x D8'
From £7,109.99 £10,924.99
Save £3,815
Addroom® Conservatory Alternative
January Sale
Addroom® Conservatory Alternative
W3m x D2.5m / W10' x D8'
From £5,564.99 £8,569.99
Save £3,005
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Showing 37-48 of 121 products
Only 25% Deposit is needed for online orders at Dunster House