Introduction
A garden room is a stylish and flexible way to add usable space without the disruption or cost of a full home extension. In this guide, we break down the costs of having a bespoke insulated garden room built in the UK, inclusive of the price per square metre.
How Much Does a Garden Room Cost?
A professionally built, fully insulated garden room in the UK typically costs between £10,000 and £30,000, depending on size, design, and specification.
At AGV, our HAUS garden room prices start from £9,995 + VAT for a 3 × 2 m model (around £1,500 per m²). That includes a galvanised steel base, composite cladding, flooring, integrated lighting, heating, and a choice of door configurations.
What is the Cost Based On?
- Size and Footprint – The larger the room, the more materials and labour are required.
- Specification – Premium glazing, insulation, finishes, and fixtures raise the build cost but improve comfort and longevity.
- Foundations and Site Prep – Uneven ground or difficult access can add to installation costs.
- Utilities – Power, lighting, and heating integration are essential for all-season use.
- Finishes – External cladding, internal linings, and flooring choices all make a difference.
When considering a garden room, it’s important to think about its intended use(s) and align your design choices with your available budget.
Where possible, choose a well-insulated model, as proper insulation significantly improves the structure’s longevity, energy performance and comfort in every season.
What is Cheaper? A Bespoke or Pre-built Garden Room?
Bespoke garden rooms tend to cost more because they involve custom design and architectural planning, specialised materials and finishes, plus additional on-site labour and consultation time.
On the other hand, pre-built or modular garden rooms are typically more affordable, as they’re produced in standard sizes and assembled on-site. This streamlined approach reduces groundwork and labour, allowing for a much quicker installation.
Do Garden Room Increase Property Value?
In most cases, a well-designed, insulated garden room can add 5% to 15% to a property’s value, depending on the design, finish, location and integration with the property.
However, the actual uplift depends heavily on local market conditions, build quality, finishing standards and buyer perceptions, hence this is as an illustrative estimate, not a guaranteed return.
Conclusion
In summary, while prices vary depending on size, materials, and finish, a professionally built HAUS garden room typically starts from £9,995 + VAT, or around £1,500 per m². The choice between a modular or bespoke design depends on how you plan to use the space, as well as the level of insulation and build quality you want to achieve.
