How Much Do Garden Rooms Cost?
Last Updated: March 2026
How much does a garden room cost in the UK?
Garden rooms in the UK cost between £8,000 and £150,000+, with most homeowners spending £20,000–£35,000 for a well-insulated, year-round room. Based on our analysis of real supplier quotes, a 3m × 3m garden room averages £21,646 and a 5m × 3m averages £26,929 - both including VAT, foundations, and installation.
Prices vary significantly based on size, specification, cladding, glazing, and whether you opt for a turnkey package or shell build. Use the calculator below to find typical budget, standard, and premium prices for nine common sizes.
Garden Room Price Calculator — based on January 2026 survey data Select from these common sizes to see a typical price range: ↑ Choose a size above to see your price estimate What are you thinking of using your garden room for? See which experienced garden room companies work in your location — not all do.
Our price data is based on quotes collected from UK garden room suppliers in January 2026.
The number of companies surveyed for each size range is shown alongside each figure in the calculator above.
Garden Room Starting Prices
Most garden room manufacturers will offer a starting price for their buildings based on the footprint size. This is usually the cost of their standard package, which includes the basics needed to create a functional garden room.
To save you time, we’ve surveyed the starting prices of over 50 garden room ranges, focusing on popular sizes. While manufacturers use different construction methods, we’ve compared similar packages. For each price we gathered, the following elements were included:
- Foundations
- Weathertight insulated building
- Standard exterior cladding
- Interior finishing
- Wiring and sockets for lighting and power
- VAT
However, these prices typically don’t include the final electrical connection or optional upgrades you may choose to customise your garden room.
What’s Included in the Price of a Garden Room?
Our research revealed that garden room companies approach pricing differently. While some include all essentials in their starting price, others list prices that exclude key elements like the foundation or electrical packages.
| Project Element | Included in starting price | Notes |
|---|---|---|
| VAT | Usually | Most companies quoted prices include VAT. Those that don't include VAT can seem more affordable at first glance. |
| Delivery | Partly | Typically, delivery in a radius of the company's workshop is included in the building's base price. Over this radius, delivery is charged by the mile or postcode area. |
| Installation | Usually | The majority of the garden room market includes installation of the building in their quoted starting price. For some pre-designed garden room ranges, the installation part of the project is quoted as an optional extra. |
| Foundations | Usually | With the advancement of groundscrew and plinth foundations, the majority of garden room manufacturers include the foundation in the quoted starting price. There are still lots of ranges where they either price the foundation separately or ask you to organise it with another company before they arrive on-site. |
| Insulation | Almost Always | Insulation in the floor, walls and roof structures is a key element of a garden room and what makes it stand out from other types of garden buildings. 90% of the garden rooms on the market are sold fully insulated, but a few companies are now pricing their buildings with the insulation pack as an optional extra. |
| Doors & Windows | Usually | The starting price of a garden room usually includes a standard door and window configuration. These are normally house-quality uPVC units. Any changes you make to the standard door & window configuration would then affect the price. |
| External Cladding | Usually | External cladding is usually included in the quoted starting price of a garden room. This is typically the company's standard finish, so in some cases, it will be an entry-level finish like Redwood, and with other companies, the standard finish will be Cedar. |
| Roof Covering | Usually | A garden room's quoted starting price usually includes the roof covering. Finishes such as insulated steel panels and EPDM membranes are commonplace. In our research, we have found several companies offer asphalt finishes, as standard, with options to upgrade to long-lasting EPDM. |
| Lighting & Power Sockets | Almost Always | The majority of garden rooms are priced to include the wiring of lighting and power points. However, a growing number of companies are not including them as standard and offering an electrical pack upgrade option. See the item below on the final electrical hook-up. |
| Electrical Hook-up | Sometimes | The majority of garden room companies offer the final electrical connection either as an optional add-on service or ask you to organise it with a local electrician. Companies that provide a turnkey service tend to include the final electrical connection in the prices they quote. |
| Data Cabling | Not Often | Some companies offer data cabling for your internet connection in their starting price; they tend to be the ones that provide turnkey services. Most commonly, data cabling is an optional extra. |
| Heating | Sometimes | Some companies offer an electric panel heater in their starting price with options to upgrade. Other companies don't provide any form of heating, as standard. You will want a heater for the coldest days of the year. |
| Interior Lining | Almost Always | Most garden rooms come with an interior lining, whether unpainted MDF boards, white Melamine boards or a high-spec plastered and decorated finish. There is a growing trend to offer the interior lining as an optional extra, which can be handy if you want to do some DIY. |
| Flooring | Almost Always | The majority of garden room starting prices include laminate flooring and skirting boards. Although, some companies leave you with a boarded finish and offer the option of flooring upgrades. |
There’s also a growing trend for companies to quote for the weathertight exterior shell only, with optional add-ons for:
- Foundation systems
- Insulation
- Electrical wiring
- Interior finishes
While the prices in our survey include the basics (excluding the final electrical hook-up), knowing what’s typically included in a package can help you make accurate comparisons.
What's Not Included in a Garden Room Quote
Most standard quotes include VAT, delivery within a set radius, installation, foundations, insulation, external cladding, windows and doors, and the electrical wiring for lighting and power sockets.
The following are typically excluded and should be budgeted for separately:
- Mains electrical connection: £1,500–£3,500 depending on the distance between the garden room and the house and if additional electrical work is required to support the new circuit, carried out by your electrician once
the building is installed - Delivery beyond standard radius: charged per mile; confirm the supplier's radius
before ordering - Planning fees: if not able to build under Permitted Development rules.
- Furniture and interior fit-out: not included in shell or building-only packages
Always request an itemised quote and ask specifically what is and isn't included.
Ways to Buy a Garden Room
There are several routes to buying a garden room, and the model you choose will directly affect the price you're quoted. A fully turnkey package, where the company handles everything from groundworks to fit-out, is not comparable on price to a shell build where you arrange the finishing work yourself.
When you're getting quotes from different suppliers, it's worth confirming which model each one is based on — otherwise you can end up comparing figures that don't reflect the same scope of work at all.
| Purchasing Model | What's Included | Best For |
|---|---|---|
| Turnkey package | Everything — design, supply, groundworks, installation, interior fit-out and final electrical connections | For people who want a hassle free project managed build leaving you with a ready to use room |
| Finished Building without electrical hook-up | Design, supply, groundworks, installation, interior fit-out, electrics ready to be connected to the house by an electrician | For people who are happy to organise the final electrical connection between the garden room and the house with a certified electrician |
| Just the building - without foundation and electrical hook-up | Installation of the garden room onto a pre-prepared foundation. Includes interior fit-out but not the final electrical connection between the garden room and the house | For people who are happy to organise the installation of the foundation separately in readiness for the garden room and organise an electrician to handle the final electrical connection to the house |
| Weathertight exterior shell | Design, supply, groundworks and the weathertight core structure with exterior finishes, doors and windows installed. Interior and electrics left to finish your way | For people who want the peace of mind of a professional installation but want to make their own mark on the interior layout and finishes |
| Shell building | Design and supply of the insulated core structure and a breather membrane that makes it temporarily weathertight | For people who want to do most of the work themselves and freedom to choose the finishes used both internally and externally. You usually have to organise the foundation, all the materials and an electrician to fit the electrical system |
| Garden room kit | Usually supplied in panels with the interior and exterior finishes applied and you assemble it | For people who are happy to follow a plan and assemble the garden room themselves. Many kits include the foundation system but you need to check. You would have to organise the final electrical connection. |
Garden Rooms Over 30 Square Metres
If your garden room exceeds 30 square metres, it must comply with Building Regulations. This often requires higher specifications, which increases the cost. Bespoke design companies are generally well-equipped to meet these regulations and tailor the building to your needs.
