Shire Cali Garden Office 20 x 12 Pent and Storage

SKU: CALI2012LST-1AA
Regular price £16,869.00 inc. VAT
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Shire products are delivered sectional/flat-packed to kerbside unless stated otherwise. Price includes assembly.

The Cali 20 x 12 Garden Office offers a spacious and bright interior with a pent roof, fully glazed double doors, and windows that let natural light flow in, creating a welcoming environment.

As well as a garden office, the Cali could also be used in such settings such as a seating area, gym, or dining space. Professional installation is included so that you can enjoy a hassle-free installation process. You need to ensure you provide a firm and level base, preferably concrete.

Ventilation is crucial in any space, and the double doors of the Cali Pent provide excellent airflow. The external cladding is made of an engineered wood board with a cedar finish treated with advanced adhesive resins, water-resistant waxes, and zinc borate, protecting against fungal decay and insect damage. The material is also highly durable and resistant to wear, which will look great for years.

Inside, the walls and roof are insulated with YBS Airtec Double, providing the same level of insulation as 55mm of polystyrene. The flooring is also insulated, made of tongue and groove boards with 25mm Celotex insulation, with a stylish herringbone vinyl finish. The joinery on the windows and doors is handcrafted, adding a modern aesthetic to the summerhouse. The front window and doors are interchangeable, allowing you to personalise the space. Upgrade to UPVC or aluminium windows and doors in anthracite grey, black, or white at an extra cost. These options will reduce the door height slightly, and prices are available on request.

The Cali 20 x 12 Garden Office is low maintenance and requires minimal upkeep, with periodic repainting to keep it looking new. And if you need additional storage space, the side storage with a single door can be secured with a padlock (padlock not included), ensuring your belongings remain safe and secure.

Have you been looking for that perfect home garden office? Look no further than the Cali. 

Your Garden Office: a range of choices

Choose a mix of your favourite colours or select hues that complement each other. The Cali is supplied factory painted internally and externally in one of these available colours: Aegean, Anthracite, Champagne, Coastal Blue, Dark Brown, Green Tea, Gull Grey, Lime Green, Rustic Brown, Sage Green, Silver Birch and Vanilla Cream.  You can choose a different colour for the inside and outside. Choose a mix of your favourite colours or select tones that complement each other. 

Your Garden Office:

The Shire Cali Garden Office is made from FSC® certified timber. As well as receiving your beautiful new garden office, you can sleep well knowing that this low-carbon footprint garden office is made from ethically sourced materials. It comes with a 10-year warranty. 

Price includes assembly by Shire’s professional fitting team. You’ll need a firm and level concrete base. Our manufacturer’s assembly team will contact you requesting images of the base.  Occasionally, they may visit the site to confirm the base is suitable for assembly. Once they have confirmed the base is appropriate, you will be given a delivery/assembly date (delivery and assembly are on the same day).

Please note: Images depict the summerhouse pre-painted and with furnishings and accessories; these are for illustration purposes only and are not included with your order.

Garden Office Aftercare:

The home garden office has been treated using a proprietary zinc borate-based process.  As this is an advanced treatment, it makes it a maintenance-free garden building. If required, you can repaint the building to keep it looking new.

Also available: Cali 8x8 Pent, Cali 12x8 Pente, Cali 16x8 Pent, Cali 16x8 Pent & Storage, Cali 20x8 Pent, Cali 20x8 Pent & Storage, Cali 12x12 Pent, Cali 12x12 Pent & Storage, Cali 16x12 Pen, Cali 16x12 Pent & Storage, Cali 20x12 Pent

Dimensions vary based on each log cabin size. Please see out attached floor plan and dimensions images for accurate measurements. Of course, if you have any questions please get in touch here

  • 5 week lead time
  • 10 Year Anti Rot Garuntee

We provide FREE delivery to most mainland UK postcodes; however, a few postcode areas are outside our coverage.

Delivery and Installation Timeframes

We offer same-day delivery and installation services. While we strive to complete the installation on the same day, larger buildings may require more than one day for installation. You can find the estimated delivery and installation lead time for this product on the product page above. Our lead times are calculated in working days (Monday - Friday) and do not include Bank Holidays. These estimates are sourced from the manufacturers and serve as a general guideline, subject to fluctuations in demand. We provide this information in good faith to represent the expected delivery during that period. Please note that some remote areas might experience slightly longer lead times.

Delivery and Installation Procedure

Within 5 working days, Shire, the manufacturer, will reach out to you. This communication will be via either a text message or an automated telephone message. If a mobile number is not provided, the latter method will be used. This message will include the necessary website link where you can review and accept the assembly's terms and conditions. Prompt acceptance of these terms is crucial to avoid any potential delays. Once you've agreed to the terms and conditions, Shire will contact you within the specified timeframe to arrange the delivery and assembly date for your order. Please note that this process might take more time during peak seasons. Keep in mind that the installation team will require unobstructed access to your garden, a minimum of 18" clearance around the building, and a solid, level foundation. It's important to know that Shire's installation team cannot bring the building through your home, as they lack the insurance coverage for entering a customer’s property.

Delivery Day


The manufacturer, Shire, handles the delivery process. Typically, this item will be delivered using a 17-ton flat-bed vehicle, similar in size to a council refuse lorry. Deliveries are scheduled within the time frame of 7 am to 7 pm.

Guarantee - 10-year warranty

Walls - 11mm external engineered wood board with cedar finish + 25mm YBS Airtec Double insulation + Internal 12mm MDF moisture resistant board, grooved to imitate classic cladding

Floor - 44mm thickness includes: 19mm tongue and groove + 25mm Celotex + internally finished with herringbone effect vinyl

Roof - 48mm thickness includes: 11mm OSB Topside + 25mm YBS Airtec Double insulation + Internal 12mm MDF moisture resistant board, grooved to imitate classic cladding + EPDM Rubber Roof

Frame - 70mm x 44mm

Windows - double glazed 3 x opening front window, 1 x opening side window

Doors - 1 x double doors with full-length double glazing and 1 x single security door

Treatment - Zinc borate-based process

Please see our Shire Sheds FAQ here