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3 x 4m Insulated Garden Room with Side Shed

3 x 4m Insulated Garden Room with Side Shed

Regular price £9,499.99
Regular price Sale price £9,499.99
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  • Opt for Professional Home Installation
  • Enjoy our 10 Year Anti Rot Guarantee
  • Sturdy 72mm Thick Double Skinned Walls
  • Walls and Roof Insulated with EcoQuilt Insulation
  • Floor Insulated with Air Tec Insulation
  • Double Glazed Windows for Warmth, Security & Noise Reduction
  • High-Caliber Tongue & Groove Roof and Floor
  • Made from Sustainably Sourced Timber
  • Handmade in the UK for Superior Quality
  • Side Shed for Additional Storage Space
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manufactured in the UK

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Garden Rooms

Zone A - FREE

AL, B, BA, BB, BD, BH, BL, BN, BR, BS, CA, CB, CH, CM, CO, CR, CT, CV, CW, DA, DE, DH, DL, DN, DT*, DY, E, EC, EN, FY, GL, GU, HA, HD, HG, HP, HR, HU, HX, IG, IP, KT, L, LA, LE, LN, LS, LU, M, ME, MK, N, NE, NG, NN, NP, NR, NW, OL, OX, PE, PO*, PR, RG, RH, RM, S, SE, SG, SK, SL, SM, SN, SO, SP, SR, SS, ST, SW, TF, TN, TS, TW, UB, W, WA, WC, WD, WF, WN, WR, WS, WV, YO

Zone B - £199.99

CF, DG, EH, FK, G, KA*, KY, ML, PA*, TD

Zone C - £749.99

AB, DD, DT*, EX, IV*, LD, LL, PA*, PH*, PL, SA, SY, TA, TQ, TR*

Zone D - £369.99

GY, IV*, JE, KW*

Delivery Unavailable -

BT, GY, HS, IV*, JE, KA*, KW, PA*, PO*, TR*, ZE

*Delivery charge/availability may vary based on location within the postcode

    Total: £9,499.99
    Important Info


    The 3m x 4m Insulated Garden Room with Side Shed

    Our 3m x 4m Insulated Garden Room is a generously sized garden building, designed with timeless features, ideal for a multitude of uses. With full length glazed doors and windows, light floods into this welcoming space ensuring it can be used for whatever you choose. With a contemporary overhang creating a welcoming approach, this garden room ties in seamlessly to any outdoor space.

    Beyond offering a new place to relax, the added advantage of a functional side shed provides extra storage space without contributing to additional clutter in your home. Perfect for storing garden equipment, DIY tools, bicycles, and children's toys.

    Our standard range of insulated garden rooms are available in a wide range of sizes.

    Benefits of an Insulated Garden Room

    Insulated garden rooms provide a budget-friendly solution for expanding your living area to suit your specific requirements. As a separate structure from your main residence, they offer a sense of tranquillity and seclusion, making them ideal for various purposes such as a home office, exercise space, art studio, or a serene retreat to enjoy your outdoor surroundings.

    Thanks to their insulated, double-skinned construction, these garden rooms are well-suited for year-round use, ensuring you maximise the utility of your investment. With insulation incorporated into both the roof and floor, these rooms offer comprehensive protection against the elements. Additionally, the inclusion of double-glazed windows not only helps regulate the internal temperature but also minimises external noise, fostering a serene atmosphere.

    Moreover, investing in a garden room can enhance the value of your property. On average, you can anticipate an increase in your home's value of around 1.5 times the cost of the garden room, underscoring the financial benefits of adding extra space. Given the rising popularity of remote work and home-based businesses, having a detached space is increasingly attractive to potential buyers.

    Fully Insulated Structure

    Our Insulated Garden Rooms offer fully insulated walls, roof and floor not only to make sure your new space is comfortable during the colder months, but also to encourage it to stay cool during the warmer months.

    Our range of standard insulated garden rooms boast 72mm thick walls, with EcoQuilt insulation nestled in between the timber cladding. You can also find EcoQuilt in the roof. EcoQuilt is a multi-foil insulation, manufactured in the UK which also includes a high-performance vapour control layer helping ensure your building remains free from damp and moisture. In addition to EcoQuilt, the floor is insulated with AirTec insulation which boasts a 50% reduction in heat loss by trapping air within its bubble structure.

    If you're looking for something with even more warmth, why not take a look at our Sherwood range of premium Insulated Garden Rooms?

    Mineral Felt Roof Covering

    High quality roofing felt is supplied to protect your insulated garden room from the elements and provide longevity.

    Double Glazed Windows as Standard

    With double glazed, opening windows, as standard, not only can you let the refreshing summer breeze into your garden room, it also helps encourage ventilation, boosting your building’s long life. Double glazing boasts superior heat retention in the colder months and helps keep the heat out during the warmer seasons. It also helps combat noise pollution, helping create a quiet and undisturbed hideaway.

    Anti-Rot Guarantee

    Enjoy peace of mind with our Insulated Garden Rooms, backed by a 10-year anti-rot guarantee at no extra cost. You can relax in your new outdoor space knowing your building is protected by us. To uphold the validity of this guarantee, it's essential to annually treat your new garden room with wood treatment. This simple step helps prevent fungal attacks, ensuring the longevity of your new serene retreat.

    Home Installation Included

    So you can sit back and relax, Home Installation Service by our expert installers is included with the price of this building as standard. They will arrive ready to put up your new retreat to our exacting standards. They’ll tidy up after themselves, so the only thing you have to do is step in and enjoy your new space.

    Prior to booking the date of your home installation with us, you will need to have a firm and level base ready for construction, or have selected the Elite Timber Base option from our upgrades list.

    Sustainable Timber

    Each insulated garden room in our selection is exclusively crafted from ethically sourced and certified timber, meticulously manufactured right here in the UK by our experienced team.

    Finance Available

    Finance is a great way to spread the cost of your garden building purchase. To make it as easy as possible, we've teamed up with partners, Novuna and Klarna.

    Novuna is available on orders over £500. If you pay within 12 months, you can benefit from 0% interest. Klarna offers several options, such as ‘Pay in 30 Days’ and ‘Split in Three’, both of which are also 0%. So, what are you waiting for?

    The History of Waltons

    At Waltons, we've been skilfully crafting garden buildings since 1878. Originating with the manufacturing of bee hives, we rapidly expanded to offer a diverse range of garden structures to meet various needs. With nearly 150 years of expertise in creating beautiful wooden structures, we've gained valuable insights along the way. Trust us to bring your garden dreams to life with our long history of craftsmanship.

    What do our Customers Say?

    Our dedication to excellence has earned us a prestigious Gold Trusted Service Award from the renowned review site, Feefo. When selecting us for your garden building, rest assured in the confidence that comes with this recognition. From expert pre-sales assistance to knowledgeable aftercare and support, our accolades speak volumes. Join the ranks of thousands who have placed their trust in us to craft and deliver the garden building of their dreams.

    Still have questions?

    If you're still unsure, why not call our expert, friendly sales team on 0800 029 1000. Alternatively, visit our showsite based in Nottinghamshire.


    Please Note: Sizes are approximate only. For specific details, please consult our sales team.

    Imperial Size (ft) 10 x 19
    People Req'd To Build 0
    Anti-Rot Guarantee 10 Years
    Cladding Style Shiplap+ Cladding
    Roof Material EPDM
    Floor Material 16mm Matchboard
    Roof Type Pent
    Door Style Double
    Building Type Garden Room
    Metric Size (Meters) 3.2 x 5.9
    Under 2.5m Tall Yes
    Material Wood

    Imperial Metric
    Width 124.9 in 3.17 m
    Depth 230.4 in 5.85 m
    Eaves Height 86.4 in 2.19 m
    Ridge Height 96.3 in 2.45 m
    Door Width 59.5 in 1.51 m
    Internal Width 94.3 in 2.4 m
    Internal Depth 157.4 in 4.0 m


    You can book your preferred delivery date by either:

    1. By choosing it when placing your order with us.

    2. Through the link provided within your order confirmation email or text message

    If a delivery date is not selected, one of our friendly team will be in touch. They will help arrange a suitable delivery date that fits your schedule.

    Your garden building will be delivered using either a 3.5t, 7.5t or 18t flatbed vehicle. If you believe there may be difficulties accessing your property or the delivery location, please inform us of this prior to your delivery date.

    All our deliveries take place between the hours of 7 am and 7 pm and are carried out by one of our helpful drivers.

    On the morning of your confirmed delivery date, we will contact you by email or text message assigning you a two-hour delivery slot. This means that there is no need to wait in all day! We aim to meet these delivery times wherever possible. However, please be aware that unforeseen circumstances can cause deliveries to take a little longer. But rest assured, we are always working hard to keep delays of this sort to a minimum.

    Also, on your confirmed delivery date, we will send over a link to the Delivery Portal. Here you will be able to track the exact location of your delivery driver.

    Please note that all our deliveries are kerbside only. Our drivers are not permitted to enter your property. If you live in a terraced property, please be mindful to this.

    Our delivery driver will unload your new garden building piece by piece to prevent any damage. Yourself, a friend or neighbour will need to be present during the delivery process. This is to ensure that you are happy with the building and are available to sign for the item where required.

    In certain situations, we may be able to leave your new garden building in an assigned safe location. If this is a service that you require, please contact our Delivery Team on 0800 029 1000, prior to your confirmed delivery date.

    For further information regarding delivery areas and charges please see 'Delivery Charges Explained'.


    We offer a 14 day money back guarantee on all of our items. The guarantee commences from the date which you receive your item and we offer a free collection service as part of this agreement.

    The building must be returned in its original, untreated, resalable condition. Until the item is collected by our courier, it's the responsibility of the customer to ensure that the building remains in this condition.

    As the buildings are sold as DIY kits, we cannot dismantle on your behalf and we cannot be held liable for any third party costs. Once the building has been received by our factory, a full refund will be issued within 1-3 working days.

    Important Information

    Where can I find the exact measurements of my Insulated Garden Room?

    Before purchasing your new Insulated Garden Room be sure to check the specific measurements of its size in the Specification section of the product listing. As often in product titles, we round up measurements just so it’s easier for you to find your perfect garden building.

    How will my new Insulated Garden Room arrive?

    Garden Rooms are installed by our professional team. These garden buildings are supplied untreated and therefore once constructed you will need to apply a preservative and treatment as soon as possible in order to uphold your 10 Year Anti-rot Guarantee.

    Please note that this Insulated Garden Room has been dressed to look its very best in our product images. Any accessories and fixtures featured are not supplied with this garden building.

    Does my new Insulated Garden Room come with any guarantees?

    As standard, this Insulated Garden Room includes a 1 year Manufacturer’s guarantee, as well as a 10 Year Anti-rot Guarantee*.

    What does my 10 Year Anti-rot Guarantee cover?

    Our entire range of Insulated Garden Rooms benefit from our 10 Year Anti-rot Guarantee. This will cover your garden building against fungal decay as long as the conditions of the guarantee have been followed.

    These conditions include treating your new garden building with a high-quality timber preservative and waterproof top coat.Treatments of this sort should be applied as soon as your garden building has been constructed, and reapplied annually thereafter. This will enable you to maintain your 10 Year Anti-rot Guarantee and will keep your Insulated Garden Room in tip-top condition!

    Please note that our 10 Year Anti-rot Guarantee does not cover your garden building from the movement of timber that takes place over time. This includes; the twisting, warping and splitting of timber.

    For more information on our 10 Year Anti-rot Guarantee please refer to our Terms & Conditions.

    Does my new Insulated Garden Room require planning permission?

    We work hard to design all of our garden buildings to adhere to the planning permission guidelines. However, we cannot guarantee that planning permission will not be required. Therefore, before constructing your garden building we advise checking with your local authorities.

    What base do I require for my new Insulated Garden Room?

    A flat, level base is essential for the installation of your Insulated Garden Building. We recommend the following bases; concrete, or a wooden frame.

    Prior to the installation of your Insulated Garden Building be sure to check your base is level in both directions. If the base of your Insulated Garden Room is not level when it is constructed it will cause the building to twist and warp with the natural movement of the timber. Therefore, it is really important to adjust your base accordingly to achieve this before the installation process begins.

    For more information on how to build a suitable base take a look at our handy guide.

    How do I care for my new Insulated Garden Room?

    To ensure your Insulated Garden Room stands the test of time it’s important to follow the guidance outlined in your building’s product instructions and Manufacturer’s Recommendations.

    We have also created these super handy Maintenance Guides to help you take care of your garden building. They are full of our expert advice and useful tips so you can enjoy your Insulated Garden Room for years to come!

    However, if you need any further support, don't worry we are on hand to help. Just give our friendly Customer Service Team a call on 0800 029 1000.

    Frequently Asked Questions

    Can I choose a delivery slot?

    We will contact you on the morning of your confirmed delivery date by email and/or SMS with a 2-hour delivery time slot. We aim to meet these delivery times but during busy periods, deliveries may take a little longer, however we always work hard to keep delays to a minimum.

    What access is needed for my delivery?

    Our drivers are only contracted to provide kerbside drop offs and deliveries. They will NOT bring any of our orders through your home. A driver may offer to take an order further; for instance a back garden but this is ONLY at their own discretion. If you have added our installation service to your order please be aware that they will require full access to your garden. Our installation team will not bring a building through your home as they are not covered by insurance to enter a customer's home. If you have any questions about access or you live in a restricted access zone please contact our sales team on 0800 029 1000. Our team will be able to provide you with more information and specific building information.

    Will I need to help my delivery driver?

    Our drivers DO NOT need your help during a delivery. They will not ask for your help and they can manage all the items themselves. We are not insured to cover any customer injuries and therefore we ask you NOT to help or try and help our drivers while they make a delivery.

    Can't find the answer you are looking for? Checkout our full Frequently Asked Questions OR ask us a question

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