Caldecot Garden Room Installed by Outdoor Modular Spaces, Available 15sqm up to 30qm

• Brochure

 

Our Mission

It's our mission to provide you with a garden building that will prove to be one of the best investments you ever make.

 

The beauty of our design-led outdoor garden rooms is that we make it inclusive for all of the family to enjoy.

Our modular rooms are an extension of your current living space and can be used for many purposes.

Popular choices include a gym, a home office, a yoga studio, a snug, a kids play den, a music-room, a man-cave, a home beauty room or simply to enjoy the peace and tranquility of your garden as a summer room.

Each of our garden rooms can be fitted out to your exact needs and with a global push to work remotely, we’ve ensured that our garden buildings are future-proofed with the adoption of the very best technology to allow you to transition seamlessly from work to home office.

We have designed our buildings to last the test of time, with a 10-year guarantee and a 30-year life expectancy.

Garden rooms designed by OMS, will add give you that added room you desperately need, whilst adding significant value to your property. 
 

The Caldecot – CDR Range

Designed for Luxury. Built to Last.

Transform the way you live and work at home with a contemporary garden room from Outdoor Modular Spaces. Each building is crafted in the UK by skilled builders using premium materials and precision-engineered construction. Whether it’s a home office, gym, studio, or relaxation space — your OMS garden room is designed to be enjoyed year-round and built to last for decades.
 

Structure & Insulation

Every OMS garden room is constructed using C24 structural timber, built to UK Building Regulations for long-term strength and stability. Walls, floor, and roof sections are fully insulated with PIR insulation board (Celotex or similar) for excellent thermal performance, and properly ventilated, keeping the space warm in winter and cool in summer.
 

Cladding

The front elevation features Western Red Cedar tongue and groove cladding — a premium, naturally durable timber known for its warm tones and rich character. Side and rear elevations can be finished in composite or profiled steel cladding, providing a contemporary, low-maintenance finish that requires no treatment.
 

Doors & Windows

All garden rooms include a 2m wide set of double-glazed French or sliding uPVC doors, available in Anthracite Grey, Black, or White. 

The Caldecot design includes a 1m wide floor-to-ceiling side window, adding extra natural light.

All windows & doors feature argon-filled, low-e coated double glazing for superior insulation and energy efficiency, along with trickle vents for ventilation.

An upgrade to aluminium doors and windows is also available for a more architectural finish.
 

Roofing & Guttering

Each building is fitted with a high-performance EPDM rubber roof designed for longevity and zero maintenance. The roof features a powder-coated aluminium fascia to the front for a clean, modern edge and includes rear guttering and downpipe for efficient water drainage.
 

Canopy & Decking Design

The Caldecot is defined by its sleek front elevation, featuring a 500 mm canopy and 500 mm composite decking area that seamlessly frame the building’s entrance. Together, they create a refined architectural statement while serving practical purposes — providing light shade and a welcoming transition from garden to interior.

The canopy is finished with a vented soffit matching the colour of the fascia, doors & window, whilst the decking is built using durable, low-maintenance composite material, ensuring long-term performance with minimal upkeep. Integrated LED downlights within the canopy enhance evening ambience and highlight the clean, contemporary lines that define The Caldecot’s design.

These features embody the balance of form and function — delivering a striking aesthetic that elevates both the building and its surroundings.
 

Flooring & Interior Finish

Inside, the space is finished to the same high standard as a new home. Features include 8mm premium laminate flooring with underlay, skirting, plastered walls and ceilings, integrated LED downlights, and a wall-mounted electric radiator. Every room is bright, comfortable, and ready to use from day one.
 

Electrical Specification (Included as Standard)

Electrics are installed and certified in accordance with NICEIC certification.

• Consumer unit
• 3x double sockets (each with USB)
• Ceiling and canopy downlights
• Electric, wall-mounted radiator with a fused spur.
   

Footings (Included as Standard)

A thorough site inspection is carried out by our team prior to foundation installation. We evaluate factors including adjacent trees and their root systems, existing vegetation, site access, soil conditions, and any pre-existing foundations. Based on this assessment, we will determine which of the following foundation systems is most appropriate for your building:

• Galvanised 1250 mm ground screws – a modern, low-impact solution that avoids large amounts of concrete, minimises soil disturbance and is ideal for use near trees and root systems. 
• Concrete pads – traditional, stable and cost-effective where site conditions allow clear access and level ground.
• Reinforced concrete raft – a heavy-duty base option for challenging ground conditions or where a permanent, highly robust base is required.

By making this decision ourselves, we ensure the foundation solution is matched to your plot and delivers optimal longevity, stability and minimal disruption to your garden.

 

Sustainability & Longevity

Our garden rooms are designed with sustainability and performance in mind. Every OMS structure comes with a 10-year structural warranty and a 50-year life expectancy when maintained according to our recommendations. Built with care, precision, and respect for your outdoor space — an OMS garden room is an investment in quality living