Mercia Products Authorized Dealer
3M X 3M(D) Insulated Garden Room With Side Shed
3M X 3M(D) Insulated Garden Room With Side Shed
- Free Installation Service.
- Free Insured Shipping.
- 10 Year Anti-rot Guarantee.
- Manufactured in the UK.
- Reasonable Price
- 7-10 Days Delivery
Low stock: Only 5 left
Couldn't load pickup availability
What are the benefits of having a 3m x 3m Insulated Garden Room with a side shed?
The 3m x 3m Insulated Garden Room with Side Shed offers a perfect space for relaxation, work, or hobbies, providing a comfortable insulated garden office room. The additional 1m x 3m garden shed offers extra storage for garden equipment, tools, or bikes, making it an ideal choice for small garden rooms and those needing a garden room with installation.
Can the 3m x 3m garden room be used all year round?
Yes, the 3m x 3m garden room is fully insulated with double-glazed windows and a fully insulated roof, making it perfect for use all year round as an insulated outdoor office or insulated garden office room, even in colder months.
Is installation included with the insulated garden room?
Yes, the price includes free installation, ensuring your 3m x 3m garden room and shed are professionally set up with no hassle. Our garden rooms with installation service means you can enjoy your new insulated garden office and shed combined without lifting a finger.
What type of foundation is required for the insulated garden room?
A firm and level base is essential for the installation of your 3m x 3m garden room. This can be made of solid concrete or concrete slabs to support the structure and ensure a sturdy foundation for your insulated garden office room.
What materials are used in the construction of the garden room?
The 3m x 3m garden room is made with sustainably sourced timber, 72mm thick double-skinned walls, and a tongue-and-groove roof and floor. The insulated garden room is built to last, providing you with a comfortable and durable space for work or leisure as an insulated outdoor office.
How is the roof of the insulated garden room designed?
The flat roof of the 3m x 3m garden room is designed for excellent water runoff and is covered with high-grade mineral felt. This design helps keep your insulated garden office room dry for years, while also giving it a contemporary look in your garden.
What is the delivery time for the 3m x 3m garden room?
We offer fast, free delivery for your 3m x 3m garden room, usually within 7-10 working days. You'll receive a two-hour delivery window on the day, ensuring that the process is convenient for you when purchasing your garden rooms with installation.







Create your dream extended living space with a spacious and airy 3 x 3m Insulated Garden Room with Side Shed.
A roomy 2m x 3m Garden Room provides a snug, yet long living space ideal for relaxing, work or hobbies. If you'd like to take your work away from your home, but don't fancy a commute, an Insulated Garden Room is an ideal option.
In addition to a new living space, the added bonus of a practical 1m x 3m side shed creates additional storage space without adding more clutter to your home. Ideal for garden equipment, DIY tools, bikes and childrens' toys.
The 72mm thick double skinned walls, double glazed windows and fully insulated roof, floor and walls mean this Insulated Garden Room with Side Shed is ideal for all year-round use.
The flat roof creates a contemporary silhouette in your garden, whilst promoting excellent rain water run-off, helping keep your building dry for many years to come. The roof is covered with high-grade mineral felt.
Mercia Insulated Garden Rooms are manufactured here in the UK, using sustainably sourced and regulated timber. With free installation included, you can sit back and relax whilst we create a whole new space for you to enjoy.
Please Note: The price of this item includes full installation of the building into your garden. A firm and level base is required for this, either made of 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 matchboards.
Please Note: These Insulated Garden Rooms are NOT pre-treated or painted. Application of wood preservative is also not part of the home installation service. In order to qualify for our 10 year anti-rot guarantee the building must be annually treated with a high quality spirit based wood preservative.
Specifications
- Imperial Size: 10 x 12
- Treatment Type: Untreated
- People Req'd To Build: Fully Fitted
- Guarantee: 10 Year Guarantee
- Cladding: Shiplap+
- Roof Material: Tongue and groove
- Floor Material: Tongue and groove
- Roof Type: Pent
- Door Style: Double Door
- Building Type: Garden Room
- Metric Size: 3m x 3m
- Under 25: Yes
Dimensions
- Width: 10' 4" / 3.17m
- Depth: 12' 7" / 3.84m
- Eaves Height: 7' 2" / 2.19m
- Ridge Height: 7' 10" / 2.39m
- Door Width: 4' 11" / 1.51m
- Door Height: 6' 0" / 1.85m
- Floor Width: 10' 3" / 3.14m
- Floor Depth: 10' 3" / 3.14m
Installation Service

Sit back and let us do the hard work! Our installation service is designed to not only save you valuable time but also take the work of moving and constructing the building off your shoulders. Our fully trained, expert fitters work professionally and carefully to ensure that your new garden building is constructed safely and to the highest industry standards.
And don't worry, we make sure to clean up afterwards, taking away excess packaging and leaving you to enjoy your new building.
Learn more at: https://www.gardenarch.co.uk/pages/installation-service
Home Delivery

We offer a fast, free and reliable home delivery service with every order to most UK postcodes. With the ability to pick-a-day that suits you and your schedule, there's no need wait around for days on end.
Our friendly and punctual delivery drivers will deliver your building within 7 - 10 working days of purchase at the front of your property. All of our products are delivered flat packed, to ensure it is easy for you to move the product from the delivery location to the build site.
On the day of delivery you'll be given a two hour delivery slot and our driver will keep in contact with you, so you can make the most of your day.
Learn more at: https://www.gardenarch.co.uk/pages/delivery
GardenArch vs Other Brands
-
GardenArch
- Reasonable Prices + No Fees
- Free Shipping.
- Free Installation Service.
- Made in UK.
- 100% High Quality Materials.
- 10 Year Anti-rot Guarantee.
-
Others
- Expensive Prices + Fees
- Paid Shipping (£100+).
- Paid Installation Service (£500+).
- Imported from China.
- 100% Low Quality Materials.
- 1-5 Year Anti-rot Guarantee.
The Installation Service Process





Why Choose Us?
-
Free Pick A Day Delivery
-
Free Installation Service
-
100% Made in UK
-
10 year Anti-Rot Guarantee
-
100% Satisfaction Guaranteed