Quality Over Prices

Addroom® Garden Room Brick Effect- Left Centre

Approx. W5m x D3m / W16'6" x D10'

(Sizes shown are approximate & full sizes are shown in the product specification)

From £7,459.99 £8,609.99
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  • Easy build DIY panel system for quicker install
  • Cost effective conservatory alternative
  • Brick effect walls. Low maintenance & durable
  • Walkthrough height of 1.84m for a fully usable room

Addroom® Garden Room Brick Effect- Left Centre Overview

Add extra space to your home with an Addroom 5m x 3m Garden Room, the perfect multipurpose building. Comprised of pre-made insulated panels, construction is easy, making it a more hassle free alternative to building a conservatory. It is also much more cost effective. Kit it out with a home bar, pool table and cinema screen to make the perfect man cave for you, your family and friends.

 

With fully insulated walls, floor and roof, this garden room is ideal for year round use. And the durable water resistant Composite exterior will keep you enjoying your garden room for years to come.

Key Features

  • Insulated 140mm solid walls, 65mm roofing, 40mm floor
  • Secure, industry leading 12-point locking system
  • 10 Year guarantee on pressure treated floor bearers
  • 28mm toughened double glazed uPVC windows and doors

The secure double glazed multi-point locking uPVC windows and doors will keep valued items safe, while the wide opening French door allows you easy access. The stylish appearance of your garden room is finished off with brick effect walls and a slate tile effect roof.

Additional Information

Established in 1994, we are Industry experts that YOU CAN TRUST!

We are a UK family-run business supporting more than 700 jobs up and down the UK with dedicated distribution centres strategically placed across the country so that we can deliver products to you quickly.

We have been selling garden buildings and structures for decades, so you can realise your dreams and create the perfect outdoor space, whether it is for relaxation, a place of work or a destination to fulfil your hobbies or to simply entertain…

…our vast range of products means that you are bound to find the ideal solution for YOU.

family-business

Why have so many chosen to buy from Dunster House?

Trusted-by-Tens-of-Thousands-of-Customers

Trusted by Tens of Thousands of Customers

Our customers are at the forefront of every decision that we make, that is why we have been able to sell millions of products to satisfied customers up and down the county. Why not check out our Trustpilot reviews? They speak for themselves!

Buy-Direct-from-The-Manufacture.

Buy Direct from The Manufacture!

Buy directly from Dunster House, and you will benefit from great value prices. Who wants to pay more than you have to? Well, at Dunster House you can cut out the middleman – We design, We make, We deliver!

Exceptional-Value-Superb-Quality

Exceptional Value, Superb Quality

We are known for providing exceptionally high-quality products at affordable prices. Be wary of competitors who offer lower-spec products, cut corners to save on prices and try to upsell you on necessary items such as flooring, roofing material and safety features!

To ensure the very best quality, we only use slow-grown White Spruce Timber, which is harvested in cold climates to ensure solid, dense log rings. This gives the wood superior strength and longevity, and a much more consistent colour than the likes of Pine.

Products-Designed-for-the-DIY-Market

Products Designed for the DIY Market

All of our garden buildings are designed with the DIY market in mind. Why? Because it saves the need to employ a carpenter or builder helping you to save money and costs. Follow our detailed instructions and you will be showing off your achievements to friends and family in no time.

Speak-with-Experts-and-Buy-with-Confidence

Speak with Experts and Buy with Confidence

Our in-house sales team are available during business hours to answer any questions you might have before making a purchase. With expert product knowledge, have your questions answered so that you can buy with confidence.  Contact us today

 

A Wide Range of Products to Choose From


Explore our extensive range of products online or download one of our free brochures for more detailed information. Our user-friendly website allows you to easily search and filter through our garden buildings to find exactly what you need. Each product page provides comprehensive descriptions, high-quality images, and customer reviews to help you make informed decisions.

If you prefer a more traditional approach, our free brochures are available for download. These brochures provide in-depth insights and product specifications to help you get the most out of our products. Whether you’re browsing on-the-go or reviewing options at your leisure, our brochures are designed to be a convenient and informative resource.

The majority of our garden buildings, structures and climbing frames are made from natural materials therefore variations in the materials provided can occur along with natural changes and differences. In some cases too, it may be necessary to treat your product. Be an informed buyer and learn more.

 

Looking for some Inspiration?

product-range

Explore our customer inspiration gallery, a treasure trove of creativity and innovation, showcasing a myriad of garden ideas brought to life by our valued customers. Immerse yourself in a visual journey where elegant outdoor living spaces come together to inspire your own garden projects.

Dive deeper into our customer case studies, where compelling customer stories unfold alongside captivating images. These real-life examples illustrate how our products have been used to achieve stunning results, offering practical inspiration and guidance for your own endeavours.

Whether you’re envisioning a serene sanctuary, a productive work space, or a stylish entertainment area, our customer inspiration gallery and Case Studies provide a wealth of ideas and solutions to help you realise your garden dreams. Let these stories and images ignite your imagination and empower you to create a garden space that reflects your unique style and aspirations.

The inner walls of our garden rooms are made using a fire resistant fibreboard for increased protection. This is a hard-wearing material made from recycled paper fibres and Gypsum (Hydrous Calcium Sulphate). The fibreboard is supplied unpainted so you can design and decorate the interior of your garden room to your own individual style. This material is a good surface for paint and is easy to wallpaper.

fire resistant inner wall for garden rooms

Our Addroom Garden Rooms come with an easy-to-install insulated roof panel that has an attractive grey slate tile effect appearance. This offers the best performance and aesthetic finish, imitating a traditional design that gives your building a modern look.
The 65mm thick insulated sandwich panel provides high levels of thermal efficiency and good sound insulation. It has a polyurethane insulation foam core protected by two sheets of pre-lacquered, galvanised and profiled steel. The upper tiled effect layer is formed by a total of six tiles, not five like others do, as it offers more resistance and insulation capacity. Polyurethane is a high density material with fantastic insulative properties. The lower steel plate is finished in basic white.
The roofing panel boasts a U-value of 0.32 W/m2K. This compares to 2.8-3.0 W/m2K that you might typically see on an old conservatory glass roof where there is air space between the panes of glass.
What’s a U-value? 
U-values refer to the rate of thermal transmittance through a material or structure – how good a thermal conductor or insulator it is. U-values are measured by the unit W/m2K. The lower the U-value, the better!

The overlapping joining system gives the roof tight connections that help prevent leaks and humidity, ensuring warmth is kept in and doesn’t escape through the ceiling. The high quality roofing system has been subjected to numerous tests and controls to ensure the effective performance of its qualities and characteristics.

Spanish roof   Spanish roof and brick effect

You’ve probably never really considered the importance of door hinges, but we have! Unlike many competitors who only offer 3 hinges on their uPVC doors, we provide 4.

Uniquely compared to our competitors, we also specialise in the manufacturing of our windows and doors with over 30 years of experience. So you can be safe in the knowledge that you are buying direct from the manufacturer without any middle-men!

Why does additional hinges matter? Rather than risk a door falling out of alignment due to too much pressure and wear on 3 hinges, we reduce the risk by including an additional hinge.

This means that you are far less likely to have to make adjustments to your doors over time.

upvc four hinged doors

All our garden buildings have been designed on the basis that any competent DIY customer should have no problem installing a product themselves in a short amount of time. You do not have to be an expert at DIY to build a Dunster House garden building, as we do provide you with comprehensive pictorial instructions. We totally understand that DIY is not for everyone therefore, you may want to consider getting in touch with a local carpenter or handyman to install it for you. But before you do, check out our construction video and decide for yourself!

The Addroom garden room is supplied in ready-made sandwich panels for easy assembly. The simple construction system makes it a much cheaper, easier and quicker alternative to brick extensions and conservatories. You can get your new garden room up and running in no time, so you can spend more time enjoying it and less time building it.

Addroom Garden Room Easy To Build Panel System

Insulation is important in helping to maintain the temperature inside your garden room, so you can maximise its use all throughout the year. It will help to retain any generated heat inside to keep you warm during the colder months. It will also help to keep the building cool inside during hot summer days. This means you will have a comfortable living space no matter what time of year it is.

 

All Addroom Garden Rooms come fully insulated with polyisocyanurate sandwich panels making up the walls and floor of the building. The roof also comes as an insulated sandwich panel with a high density polyurethane core. The walls have a 70mm cavity to increase airflow and ventilation, with two skins of 25mm thick insulation, while the floor is made with 25mm thick insulation. We use polyisocyanurate insulation as it gives high thermal efficiency, and is known to be far superior to alternative materials used by other companies, such as polystyrene, rockwool or bubble wrap.

 

Possessing all the benefits of plastic and timber combined, composite is ideal for use on outdoor buildings. It is hard-wearing, resistant to water, and requires very little maintenance. The impressive brick effect design on the exterior walls enable you to match your garden room to your house. The traditional red coloured, natural toned brick will give an attractive finish to your garden room that will blend beautifully with your home.

Please note that unpainted/untreated areas of composite may differ slightly in colour due to manufacturing.

Addroom Garden Room Red Brick Effect Exterior

The wide opening PVCu French doors offer a large walkthrough width, providing easy access for moving items in and out of your garden room. They also allow you to make the most of the fresh outdoor air and natural sunlight.

wide opening doors for addrooms

All of our garden buildings have pressure-treated floor bearers as standard. This treatment prevents the timber bearers from rotting for up to 10 years and causing your garden building to sink. Pressure treatment forces the wood preservative into the timber rather than simply dip treating (essentially just covering the exterior) like many companies still do. Who wants to have to annually deconstruct and re-treat the bearers each year!

Due to this costly but effective process, we can offer our customers a genuine 10-year guarantee against rot and insect infestation on the bearers.  We do however recommend applying a good quality water repellent to the timber to prolong the longevity of the timber. Shockingly many of our competitors still offer untreated bearers to keep their costs down, so beware!

All our Pressure Treated timber is for Use Class 3

Pressure Treated Bearers

Rotten Untreated Floor Bearers

Whatever you choose to use your garden room for, security is important to keep all your treasured belongings and valuable items safe. This is why we include uPVC French doors with an industry-leading 12-point locking system, as well as multi-point locking windows with key locking handles.

 

Our 12-point locking system consists of four shoot bolts, three espagnolettes, three hook bolts, a locking latch and a 6-pin euro cylinder. Our window locking system consists of mushroom-headed espagnolettes which move in opposite directions into metal keeps.

addroom garden room brick effect 4 x 3   multipoint locking system

Our garden rooms are supplied with domestic standard uPVC windows and door frames available in White as standard or Anthracite Grey Wood Effect. So you can either tie in with your home frame colours or customise your office or garden room!

Not all double glazing is the same, and what truly makes our double glazing stand out among the rest is the sealed unit. We supply a 28mm, double glazed sealed unit. These units comprise of 2 panes of 4mm toughened glass on either side of a 20mm aluminium spacer bar, designed to absorb any moisture within the sealed unit, which could lead to condensation inside the glazing. These sealed units comply to BS EN 1279 standards. This EN standard covers the requirements for insulating glass units, including thermal and sound insulation. The sealed units are independently tested to show that they will not suffer from any form of condensation within the unit.

We’ve been manufacturing uPVC windows and doors for over 30 years – so we really know our stuff!

28mm Double glazing on Garden Offices

We were the first on the market to provide tall walkthrough height to the UK market. There’s no need to ‘duck’ on the way in through our quality double French doors. With a tall walkthrough height of 6’2″ (1.88m) you’re free to move in and out of your cabin concussion free. There are other companies who have tried to copy us but have had to include the doorframe as part of the walkthrough height!​

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The Addroom is a relatively new type of home leisure building, being that it is an alternative to traditional methods of creating additional useful space in your property (e.g. a conservatory), its applicability to building regulations needs some clarification. Conservatories are exempt from building regulations requirements as long as the following apply.

• Floor area is less than 30 square metres
• Any wall, door or window that separates the dwelling from the conservatory (thermal separation) must not be removed
• Heating is not to be extended into the conservatory
• Compliant glazing e.g. toughened glass
• It is also required to be more than 1 metre from any boundary
These exemptions are important to as to not compromise the energy efficiency of the existing building. As the Addroom is an alternative to a traditional conservatory, but intended to be used in the same manner, it should be exempt under the same criteria. It should be noted that as the Addroom is vastly more insulated than a traditional conservatory, it will actually improve the thermal efficiency of the existing building, as well as reducing heat gain in the summer and heat loss in the winter.

Still not sure?
If you require any further information or are in any doubt, please visit the official government website, or contact your local planning authority.

Scotland
PLEASE NOTE: Please note, Scotland’s building regulation rules differ slightly and you may require a Building Warrant prior to installation. If in any doubt, please contact your local council before making a purchase.
https://www.mygov.scot/planning-permission
https://www.mygov.scot/perm-development-works

All Houses are different some are brick, some are not. We do not therefore supply the fixings, however in the ‘how to build guide’ we show where the fixing screws are to be placed and drilled into your House. This includes the walls the base and the roof.

 

Fitting electrics to an Addroom® is a popular idea and of course, to make your room usable day and night, you may want to consider installing electrics. The installation of electrics is entirely possible however, we recommend that you speak with an electrician on the best ways to fit electrics to suit Addroom® design and what you intend to use it for.

Please note that we are unable to offer guidance on how to install/make recommendations on modifications of our product beyond what we supply as standard.

Yes! Guttering can be added to any Addroom®. We have taken the decision not to include guttering because every customer’s needs are different. But, should you wish to add guttering, you should be able to acquire everything you need from a local DIY store for a nominal amount.

Please note that we are unable to offer guidance on how to install/make recommendations on modifications of our product beyond what we supply as standard.

The inner walls of our Addrooms® are made using a fire-resistant fibreboard for increased protection. This is a hard-wearing material made from recycled paper fibres and Gypsum (Hydrous Calcium Sulphate). The fibreboard is supplied unpainted so you can design and decorate the interior of your Addrooms® to your own individual style. This material is a ideal surface for paint.

No! Addrooms® can be placed on a sufficiently consolidated sub-base for the bearers to be placed on such as patio tiles. There’s no need to excavate large footings which can be expensive.

We show in the instructions manual where to place sealant around the frame including where it meets the House. We also recommend a good flashing be used on the roof. The manual shows where this meets the building and the Addroom® .

An Addroom® is a fast, cost-effective & convenient solution to home expansion. Addroom® can have numerous uses, such as a garden office, an extra family room, a games room, a music room, a gym… the list is endless.

An Addroom® can be the perfect cost-effective alternative to a conservatory. Why buy an Addroom®?

  • Simple panel system designed with the DIY market in mind
  • Why move home? Avoid expensive moving costs!
  • A useable room all year round unlike some conservatories
  • No dirty glass roofing to clean
  • An ideal office, playroom, gym and more
  • No bricks and mortar, less time, less money

It is 2.99m (9' 9") high

A commonly asked question is whether an Addroom® requires planning permission, or does the Addroom® fall under permitted development?

Due to the unique design of a Dunster House product, in the vast majority of cases, our garden buildings in England can be installed without the need for planning permission.

However, there are some factors to consider:

As all properties are different in size, shape and style we can only advise based on how we have designed our products, not on your property.

Where permitted development may apply:
• If the maximum ridge height is less than 3 metres (the Addroom® height is 2.98m (9′ 9″))
• If the building is less than 30 square metres internally (the Addroom® area is 8.07 m2)
• If the total external depth from the house wall is less than or equal to 3 metres (the Addroom® is 3.02m (9′ 10″))

You may need to consider applying for planning:
• If you intend on putting an outbuilding on the principal elevation of your property
• If you live in a listed or graded building
• If you live in a designated area such as areas of outstanding natural beauty, national parks, world heritage sites, and conservation areas
• If there is a possibility that over 50% of your garden would be taken up by outbuildings

Learn more about Planning Permission in the UK

Still not sure?
If you require any further information or are in any doubt, please visit the official government website, or contact your local planning authority.

There are several options available when looking at how to keep your Addroom® warm. Firstly, if you are only planning to use your Addroom® occasionally, we would recommend putting in a small electric heater in the Addroom®. Usually, you would turn that on 20 minutes before you are going to use it to kill off the chill.

However, if you are planning to use your Addroom® all year round for either business purposes or a play area etc, you may want to consider the option of an isolated heating system.

Remember, our Addrooms® are highly insulated for year-round use. See our features tab for more information.

This garden room is well insulated, but a small electric or fan heater is a good idea to keep the building warm inside. If you choose to install electrics, speak to an electrician about heating.

 

This Addroom® measurements are: 5.01m (16' 5") x 3.01m (9' 10")

We do not currently offer installation. All our garden buildings have been designed on the basis that any competent DIY customer will have no problem installing a product themselves in a short amount of time.

You do not have to be an expert at DIY to build a Dunster House garden building, as we do provide you with comprehensive pictorial instructions. Also, if you prefer video tutorials, we do have a selection of videos on YouTube which will support you in building your product.

We totally understand that DIY is not for everyone and it can be very overwhelming to start building your own garden product. Therefore, you may want to consider getting in touch with a local carpenter or handyman to install it for you.

If you do take on the challenge to put your garden building together, we are always here to help. Do not hesitate to contact us at any stage of putting your product together and we can provide you with all the assistance you may need. Contact our customer service team via email at [email protected].

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Addroom Garden Room 5m x 3m Measurement Outline
  • Please Note: All sizes quoted are nominal
  • Overall External Dimensions: 5.06m x 3.13m (16' 7" x 10' 3")
  • External Width: 5.01m (16' 5")
  • External Depth: 3.01m (9' 10")
  • Internal Width: 4.73m (15' 6")
  • Internal Depth: 2.92m (9' 6")
  • Internal Area (m2): 13.86
  • Ridge Height: 2.99m (9' 9")
  • Internal Eaves (Front): 2.41m (7' 10")
  • Wall Thickness: 140mm Insulated Panel, Consisting of: 10mm Composite (Brick Effect), 50mm Insulation, 70mm Frame and 10mm Fermacell Inner Wall
  • Wall U-Value (W/m2k): 0.39 W/m2K
  • Internal Finish: Unpainted Fermacell Board
  • Frame Thickness: 70mm
  • Roof Thickness: 65mm
  • Roof U-Value (W/m2k): 0.32 W/m2K
  • Roof Purlin Thickness: 45mm
  • Floor Thickness: 40mm Insulated Panel consisting of: 5mm Composite, 25mm Wood Frame with Insulation and 10mm MR P5
  • Floor U-Value: 0.79 W/m2K
  • Floor Bearers: Pressure Treated
  • UPVC Colour: White
  • Door Material: Reinforced 5 Chamber PVCu Profile
  • Door Locking System: 12 Point Locking System
  • Door Opening Size: 1.34m x 1.85m (4' 4" x 6' 0")
  • Window Opening Size: 0.93m x 0.61m (3' 0" x 2' 0")
  • Window Locking System: Multi-Point Locking
  • Glazing Material: 28mm Double Glazed
  • Gaskets: On all Windows and Doors
  • Approx. DIY Assembly Time: 2 - 3 days. This is an approximate time only, based on 2 people. Assembly time may vary depending on season/weather conditions, foundation type, ability of those constructing, etc
  • Please Note: Flashing not included

PLEASE NOTE: Scotland’s building regulation rules differ slightly and you may require a Building Warrant prior to installation. If in any doubt, please contact your local council before making a purchase.

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Delivery Information

* Free delivery on orders over £200.

We deliver our products to the mainland United Kingdom (England, Wales and most of Scotland). Some exceptions apply; these are illustrated on the map below.

Postcodes affected include:

  • TR
  • TQ6, 7, 8, 9
  • EX19, 20, 21, 22, 23, 38, 39
  • LD
  • PL10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35
  • SA
  • KW
  • HS
  • ZE
  • KA27, 28
  • IV1, 4, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 63
  • PA20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 49, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 80
  • PH32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44

Dunster House delivery map

Green – Free Assisted Delivery

Red – We are unable to deliver to these areas.

Purple – For orders to Ireland & Northern Ireland, please visit our Distributor in Ireland here.

Delivery Service

All of our products are delivered using our own fleet of vehicles, not sub-contractors. We have a large number of vehicles dedicated to delivering our quality products so we can guarantee maximum care is taken during the delivery process.

Our deliveries take place Monday to Friday between the hours of 8:00 am and 6:00 pm.

When the delivery vehicle is unloaded, it is important that you check to make sure all of the items and instructions have arrived and are correct. You will also receive a component list to check your items against. If anything is missing or damaged, it is essential that you note this on your paper work when you hand it back to the delivery driver.

Prices for our delivery services can be found on individual products.

Please note that goods will be delivered to the first point of contact at the front of your property e.g. on your driveway. This must be within 20m from the delivery vehicle (Safely Parked at Kerbside). Our team will be responsible for assessing the risk of carrying out delivery upon arrival at the property.

Should you require further information on our assisted delivery services, please click here to read our Terms and Conditions, alternatively you can contact a member of our Sales Team.

See the locations we deliver from.

Q: Where can I find more information?

A: If you have any questions regarding your delivery, you can telephone our Dispatch Team. Contact details for the Dispatch Team of your nearest branch can be found on your order confirmation. If you need to track your delivery or access your manuals in advance of your delivery, you can visit the Customer Log-In Area of our website.

Thank you for taking the time to read about our terms and advice during this period. We hope you can enjoy your Dunster House garden product for many years to come.

Why Buy From Us?

Buy with confidence! Established for over 30 years, you can rest assured of our knowledge and experience as industry leaders.

On pressure treated timbers*. We don’t dip-treat our timber unlike some competitors. Dip treatment isn’t as effective at protecting against rot and infestation!

All products are uniquely designed and of high quality with many industry leading features you will struggle to find anywhere else!

A UK company and family run business. Our products are designed  and distributed from our 11 UK distribution centres.

Many have bought from us over the last 30+ years due to our superior specification and the fact that our products are designed with the DIY market in mind.

Free delivery on most products*. Delivered to you by our own fleet of vehicles and dedicated drivers.

Inspiration/Customer Stories

Dean’s Garden Cinema Room

View Case Study

Ed’s Garden Music Room and Home Office

View Case Study

Andy and Rose’s Garden Games Room

View Case Study

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* Free delivery on orders over £200.
† Reference to Price on 22nd December, 2023

Addroom® Garden Room Brick Effect- Left Centre

From £7,459.99 £8,609.99
Save £1,150