Mercia Products Authorized Dealer
4M X 2M(D) Self Build Insulated Garden Room
4M X 2M(D) Self Build Insulated Garden Room
- 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 is included in the self build garden rooms kit?
The self build garden rooms kit includes all fixtures, fittings, comprehensive instructions, and a step-by-step video guide to help with the construction of your DIY garden office.
Can I use the 4x2m self assembly garden rooms for year-round use?
Yes, the insulated garden room kits are designed with 72mm thick double skinned walls, double glazed windows, and fully insulated roof, floor, and walls, making them perfect for all-year-round use.
Do I need any special skills to build the garden room self build?
While the building comes with clear instructions and a video guide, a good understanding of DIY is recommended to successfully assemble the self build garden room.
Is installation available for the self build garden room?
Yes, we offer an installation service to save you time. Our experts will construct your self assembly garden room safely and efficiently while cleaning up afterwards.
How long will delivery take for the insulated garden room kits?
Our free delivery service ensures your insulated garden room kits arrive within 7-10 working days, with a two-hour delivery slot on the scheduled day.
What type of base is required for the garden room self build?
The self build garden room requires a firm, level base, ideally made from solid concrete or concrete slabs, to ensure proper stability during construction.
Do I need to treat the self build garden room?
Yes, the self assembly garden rooms are not pre-treated or painted. To maintain the 10-year anti-rot guarantee, you must annually treat the building with high-quality wood preservative and waterproof treatment.







Build an additional living space with our 4 x 2m Self-Build Insulated Garden Room.
Aspiring to open a home business? Or a place to expand your hobby? A Mercia Insulated Garden Room creates a secure yet serene environment within your garden. The modular design means you can place the doors and windows in a configuration to suit your needs.
With 72mm thick double skinned walls, double glazed windows and fully insulated roof, floor and walls, this is the perfect space 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. The building comes with comprehensive instructions and a step-by-step video guide taking you through every part of the build. All fixtures and fittings are included as standard. We recommend a good understanding of DIY for the construction of this building.
Please Note: A firm and level base is required for this building, 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. 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 and a waterproof treatment.
Please Note: A firm and level base is required for this building, 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. 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 and a waterproof treatment.
Specifications
- Imperial Size: 14 x 8
- Treatment Type: Untreated
- 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: 4 x 2
- Under 25: Yes
Dimensions
- Width: 13' 8" / 4.17m
- Depth: 7' 8" / 2.35m
- Eaves Height: 7' 2" / 2.2m
- Ridge Height: 7' 6" / 2.31m
- Door Width: 4' 11" / 1.51m
- Door Height: 6' 0" / 1.85m
- Internal Width: 13' 1" / 4.0m
- Internal Depth: 6' 6" / 2.0m
- Floor Width: 13' 6" / 4.14m
- Floor Depth: 7' 0" / 2.14m
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