Mercia Products Authorized Dealer
3M X 4M(D) Insulated Garden Room With Side Shed
3M X 4M(D) Insulated Garden Room With Side Shed
- Free Installation Service (Wooden Buildings).
- Free Insured Shipping.
- 10 Year Anti-rot Guarantee.
- Manufactured in the UK.
- Reasonable Price
- 10-15 Days Delivery
Low stock: Only 5 left
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What is included in the Insulated Garden Room with Side Shed package?
The package includes a 3x4m insulated garden room with side shed, fully insulated walls, roof, and floor, plus free installation service. This offers a comfortable living space or workspace with the added benefit of an insulated storage shed, perfect for your garden tools or bikes.
Can I use the 3m x 4m garden room year-round?
Yes, the 3m x 4m insulated garden room is designed for all-year-round use. With double-glazed windows, insulated walls, and a fully insulated roof, it provides a warm, dry space throughout the seasons, making it ideal for hobbies, work, or as a garden room with toilet.
How is the installation of the insulated garden room handled?
We offer a garden rooms with installation service, where our expert fitters will install your 3m x 4m garden shed and side shed for you. The installation includes a firm and level base (such as concrete or slabs) and is performed by professional installers to ensure safety and durability.
Is there a storage option included with the garden room?
Yes, the 3m x 4m garden room comes with an integrated 1m x 4m insulated storage shed, ideal for storing garden equipment, DIY tools, bikes, or children's toys. This insulated garden shed UK is designed to keep your items safe and dry all year long.
Do I need to treat the garden room and shed for weather protection?
The garden room and shed are untreated. To ensure it lasts and qualifies for the 10-year anti-rot guarantee, you will need to annually treat the structure with a high-quality spirit-based wood preservative. This is essential for preserving the insulated garden shed.
Can I customize the design of the garden room with additional features?
While the standard 3m x 4m design comes with a flat roof, you may inquire about additional features like windows or a garden room with toilet. Customization options depend on the supplier and can be tailored to your needs.
How long will delivery take for my garden room with installation?
Delivery of your insulated garden room with installation typically takes 7-10 working days. Our friendly delivery service will ensure your garden shed 4m x 3m arrives on schedule and is set up at a time that suits you.







Create your dream extended living space with a spacious and airy 3 x 4m Insulated Garden Room with Side Shed.
A roomy 2m x 4m 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 4m 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 16
- 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 4m
- Under 25: Yes
Dimensions
- Width: 10' 4" / 3.17m
- Depth: 15' 10" / 4.85m
- Eaves Height: 7' 2" / 2.19m
- Ridge Height: 8' 0" / 2.44m
- Door Width: 4' 11" / 1.51m
- Door Height: 6' 0" / 1.85m
- Internal Width: 9' 10" / 3.0m
- Internal Depth: 13' 1" / 4.0m
- Floor Width: 10' 3" / 3.14m
- Floor Depth: 13' 6" / 4.14m
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
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GardenArch
- Reasonable Prices + No Fees
- Free Shipping.
- Free Installation Service (Wooden Buildings).
- Made in UK.
- 100% High Quality Materials.
- 10 Year Anti-rot Guarantee.
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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?
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Free Pick A Day Delivery
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Free Installation Service
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100% Made in UK
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10 year Anti-Rot Guarantee
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100% Satisfaction Guaranteed