3m x 3m Mercia Insulated Room with Side Shed and

£8,189.94
  • Pick your delivery date available
  • 10 Year Anti-Rot Guarantee
  • Ideal for storing garden tools and equipment
  • Durable timber construction
  • Secure and lockable door
  • Ample internal storage space
  • Easy-to-follow assembly instructions
  • Perfect for garden storage or workspace
  • High-quality UK manufacturing
  • 10-year anti-rot guarantee
  • Smooth-planed timber finish
  • Compact footprint for small gardens
  • Strong internal framing for stability
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Description

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

Dimensions 317.40cm
Imperial Size Ft 3m x 3m
Treatment Type Dip Treated
Cladding Type 0.00cm x 0.00cm
Cladding Thickness 7.20cm
Framing Size 0.00cm x 0.00cm
Roof Type Pent
Roof Covering EPDM
Floor Bearer Size 0.20cm
Door Width 151.20cm
Door Height 185.00cm
Window Thickness 1.40cm
People Required Installation included
Ridge Height 239.90cm
Base Width Footprint 314.00cm
Base Depth Footprint 314.00cm
Internal Width 299.90cm
Internal Depth 299.90cm
EAN 5029442013794
Material Guarantee 1.00cm
  • SKU: SI-011-003-0001
  • Brand: Mercia

Delivery for this Product

Mercia products are delivered kerbside or to your driveway. With the exception of fully assembled fence panels, all items arrive flat-packed with assembly instructions.

Booking Delivery

At checkout (excluding Metal Sheds), you’ll be asked to select a delivery date. Our Request a Delivery Date service covers most areas, with free delivery to the majority of UK postcodes. Some areas may incur a surcharge or be excluded—please check with the postcode tool.

Before Delivery (Excluding Metal Sheds)

If you provide a mobile number, you’ll receive a text on the morning of delivery with a 2-hour time slot and a link to track your order.

Mercia Metal Sheds

Metal Sheds are delivered by courier without prior notice. If you are not home, a card will be left for redelivery arrangements. Delivery timescales are shown on product pages (working days, Monday–Friday, excluding bank holidays). Remote areas may take longer.

On Delivery

Deliveries are typically made using 3.5T, 7.5T, or 18T lorries. Drivers are insured only for kerbside or driveway delivery but may, if access allows, place goods at the side of your house. They cannot deliver through your home or to unsafe areas. Please check all parts before arranging third-party installation.

Installation Orders

Installation lead time is typically 7 weeks from order. Delivery and assembly are usually on separate days, though some may be combined. The manufacturer’s team will confirm which applies to your order.

  • S. Johnson

    Excellent service, arrived on time , was kept informed all the way, delivery driver was so helpful and polite . Highly recommended.

    Manchester, 23/01/2026

  • M. Ahmed

    Thanks for the prompt delivery and well packed package.

    Birmingham, 19/01/2026

  • E. Thompson

    Arrived on time. Good quality shed.

    Leeds, 18/01/2026

  • S. Patek

    Perfect, as described. Fast delivery and well packaged.

    Bristol, 12/01/2026

  • D. Williams

    Great shed, perfect for what we needed, absolutely amazing customer service!

    Glasgow, 10/01/2026

  • J. McKenzie

    Received this morning. Very pleased with the quick delivery and pleased with the service. Very friendly Driver. Many thanks.

    Liverpool, 06/01/2026

  • F. Ali

    Good communication from supplier and a great delivery from carrier. not erected yet so can’t comment on that

    Sheffield, 30/12/2025

  • O. Brown

    Arrived when said. Easy to put together. Instructions easy to follow – two of us took 3 hours to build. Excellent value would recommend Direct Garden Buildings

    Edinburgh, 19/12/2025

  • A. Connor

    So happy with our new tiki bar, excellent quality & such good value for money. Delivery was quick & on time.

    Newcastle, 18/12/2025

  • T. Davies

    Great shed just what I needed!

    Cardiff, 16/12/2025

  • G. O'Sullivan

    Really pleased with my parcel store, which I’m actually using to store feed for the garden birds.

    Brighton, 11/12/2025

  • C. Miller

    After a mix up with delivery at the start Direct Garden Buildings were very good at sorting it. Very good value for the money will definitely use again

    London, 08/12/2025

  • D. Smith

    Amazing quality so much cheaper then the garden centre

    Bath, 03/12/2025

  • S. Clark

    Shed arrived exactly on time and looks really well made. It arrived in perfect condition and for the price and size of the shed it’s great value for money. Really happy

    York, 30/11/2025

  • R. Kumar

    Lots of screws! But not to much of a slog once you get going. End results are good

    Oxford, 28/11/2025