Celebrate with us and enjoy Exclusive 30th Anniversary Offers!

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

Human score    Trustpilot Stars    number of reviews    Trustpilot Logo

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 25-36 of 76 products
Addroom® Conservatory Alternative
Quality Over Prices
Addroom® Conservatory Alternative
W5m x D3m / W16'6" x D10'
From £7,869.99
Addroom® Conservatory Alternative
Quality Over Prices
Addroom® Conservatory Alternative
W5m x D3m / W16'6" x D10'
From £7,649.99
Addroom® Conservatory Alternative
new product sash
Addroom® Conservatory Alternative
W3m x D2.5m / W10' x D8'
From £5,374.99
Addroom® Conservatory Alternative
new product sash
Addroom® Conservatory Alternative
W3m x D2.5m / W10' x D8'
From £5,484.99
Addroom® Conservatory Alternative
new product sash
Addroom® Conservatory Alternative
W3m x D2.5m / W10' x D8'
From £5,374.99
Addroom® Conservatory Alternative
new product sash
Addroom® Conservatory Alternative
W3m x D2.5m / W10' x D8'
From £5,294.99
Addroom® Garden Room Brick Effect- Left Centre
Quality Over Prices
Addroom® Garden Room Brick Effect- Left Centre
W5m x D3m / W16'6" x D10'
From £7,459.99 £8,609.99
Save £1,150
Avon with uPVC INSULATED Log Cabin
30th Anniversary Offers on Garden Buildings
Avon with uPVC INSULATED Log Cabin
W3m x D3m / W9' x D10'
Insulated 62mm Wall, Equivalent to 140mm U-Value

3 reviews

From £4,644.99 £5,709.99
Save £1,065
Dominator INSULATED Garden Office
Quality Over Prices
Dominator INSULATED Garden Office
W3.5m x D2.5m / W11' x D8'

7 reviews

From £4,199.99 £4,824.99
Save £625
Dominator INSULATED Garden Office
Quality Over Prices
Dominator INSULATED Garden Office
W2.5m x D2.5m / W8' x D8'

12 reviews

From £3,174.99 £3,899.99
Save £725
Dominator INSULATED Garden Office
Quality Over Prices
Dominator INSULATED Garden Office
W4.5m x D2.5m / W15' x D8'

1 review

From £5,059.99 £5,524.99
Save £465
Dominator INSULATED Garden Office
Quality Over Prices
Dominator INSULATED Garden Office
W5.5m x D2.5m / W18' x D8'
From £6,149.99 £6,629.99
Save £480
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Showing 25-36 of 76 products
Only 25% Deposit is needed for online orders at Dunster House