Bespoke Garden Room Prices

Updated: 1 December 2025
Reading Time: 3 minutes

For modular garden rooms, many manufacturers feature price configurators on their websites. These tools allow you to select options for your building and immediately see how your choices impact the total cost.

If you’re interested in exploring modular garden rooms, consider these manufacturers:

For those seeking a more tailored solution, bespoke garden rooms are the best option. We’re often asked whether bespoke designs are significantly more expensive than modular counterparts.

The answer? Customised designs typically cost more, but not always drastically so. The difference often comes down to customers choosing non-standard sizes or incorporating additional design features that naturally raise the price.

How Are Bespoke Garden Rooms Priced?

Bespoke garden rooms are usually quoted on a price-per-square-metre (sqm) basis. The square metre measurement is based on the footprint size (width x depth).

Key Factors Affecting Price:

Smaller footprints: These tend to have a higher per-square-metre cost because fixed elements like doors, windows, and electrics form a larger proportion of the overall cost.
Larger footprints: As the building grows in size, the per-square-metre cost tends to decrease, though Building Regulations compliance may add to the overall cost for rooms exceeding 30sqm.

Bespoke Garden Room Prices in 2024/25

Our research into bespoke garden room prices shows a range of £1,000 to £4,500 per square metre, with an average cost of £2,358 per square metre (including VAT).

How to Ask for an Initial Ballpark Quote

If you’ve found a company whose garden room style appeals to you, getting an initial quote is a great way to see if their offerings fit within your budget. However, instead of simply emailing, “Can I have a price?”, providing a few key details will help the company give you a more accurate ballpark figure.

When requesting a quote, include:

Footprint Size: Specify the approximate dimensions of the building you’re considering, e.g., 5m x 3m. This is one of the most important factors in determining price.
Key Features: Highlight any must-have elements, such as:
- Bi-fold doors for an indoor-outdoor feel.
  Multiple rooms if you need divided spaces for different uses.
- A shower room or other amenities that require plumbing and additional fit-out work.
Intended Use: Mention the purpose of the garden room—whether it’s for a home office, gym, studio, or guest accommodation. Certain uses may require additional specifications, like reinforced flooring for heavy equipment or enhanced insulation for year-round comfort.

Why This Helps:

By including these details, you make it easier for the company to provide an accurate estimate tailored to your needs. This approach also avoids potential back-and-forth communication and gives you a clearer idea of costs upfront.

Why Are Bespoke Prices So High?

Bespoke garden room prices have significantly increased in recent years. When we began tracking these prices, the range was nearly half of what it is today.

What’s Driving Costs Up?

Material supply issues: Brexit and the pandemic disrupted supply chains, causing dramatic increases in the cost of essentials like OSB sheets. These higher costs have largely remained in place.
Inflation: Rising costs of labour and materials continue to push prices higher.

Additional Considerations for Bespoke Garden Room Costs

Footprint Size Affects Price: Smaller rooms have higher per-square-metre costs because fixed components (e.g., doors, windows, and electrics) represent a greater proportion of the total cost.
Building Regulations Compliance: Many larger bespoke garden rooms now exceed 30sqm, meaning they must comply with Building Regulations. This requires adjustments to the building’s specifications, which increases costs.
Specification Upgrades: A Building Regulation-compliant structure typically has a higher per-square-metre cost than a standard specification, so it’s worth factoring this into your plans.