What you'll actually pay
Garden room prices in the UK in 2026 range from about £5,000 for a basic uninsulated summer house to over £50,000 for a large, fully fitted annexe with plumbing. That's a big range, and it can be confusing when you're trying to work out what you should actually budget for.
We'll break it down properly in this guide. We'll cover what affects the price, what you should expect to get for your money, and what to watch out for when comparing quotes. No filler, just the facts.
The three tiers of garden room
Not all garden rooms are the same, and the price reflects that. Broadly, they fall into three categories:
Budget: £5,000 to £10,000
At this end of the market, you're looking at pre-fabricated, flat-pack buildings that are essentially upgraded sheds. They're usually uninsulated or minimally insulated, have single or basic double glazing, and come with little or no electrical work. You'll often need to arrange your own base, your own electrics, and your own internal finish.
These can work as summer houses or occasional-use spaces, but they're not suitable for year-round use as an office, gym, or living space. In a Cheshire winter, they'll be cold, potentially damp, and uncomfortable. The build quality is generally basic, and the lifespan is shorter than a properly constructed room.
If you're only planning to use the room from April to September, a budget option might work. But if you want it year-round, it won't be enough.
Mid-range: £12,000 to £25,000
This is where properly built, year-round garden rooms sit. At this price point, you should expect structural timber framing, proper insulation (50mm rigid board as a minimum), double-glazed windows and doors, a full electrical package, and professional installation.
Our rooms fall into this category. A 3x3m garden room starts at £12,500 fully installed, and a 4x4m home office comes in at £21,000 fully installed. That includes everything: the base system, the structure, insulation, cladding, roofing, windows, doors, electrics, internal lining, and installation. The price we quote is the price you pay.
This tier is the right choice for most people. You get a building that's warm in winter, cool in summer, properly finished, and built to last. It works as a full-time office, a gym, a studio, or extra living space, and it'll add value to your property.
High-end: £25,000 to £50,000+
At the top end, you're looking at larger buildings, annexes with plumbing, or rooms with high-specification finishes. Annexes with kitchenettes and bathrooms typically start around £28,000 and go up depending on size and spec. Larger workshops, studios, and multi-room buildings also fall into this range.
The higher price reflects the additional plumbing, larger structural requirements, and the extra fitout involved. If you need a self-contained space with running water, cooking facilities, and a bathroom, this is the bracket you'll be in.
What affects the price
Several factors determine what your garden room will cost. Understanding them helps you compare quotes fairly and make decisions about where to spend and where to save.
Size
This is the biggest factor. A 3x3m room (9 square metres) costs less than a 4x5m room (20 square metres) because it needs less material, less labour, and less time. Our prices range from £12,500 for a 3x3m garden room to £42,000 for a 5x6m annexe.
As a rough guide, expect to pay between £1,200 and £1,800 per square metre for a properly built, fully installed garden room in 2026. Anything significantly below that should make you ask questions about what's being left out.
Insulation standard
Insulation is one of the things that separates a garden room from a posh shed. We use 50mm Kingspan rigid insulation in the floor, walls, and roof. Some builders use thinner or cheaper insulation, and some don't insulate at all.
If a quote seems cheap, check what insulation is included. A room with no insulation or just 25mm of mineral wool might look affordable, but it won't be comfortable in winter and it'll cost more to heat. The insulation is where year-round comfort comes from.
Windows and doors
Double-glazed aluminium windows and doors cost more than uPVC, but they look better, last longer, and have thinner frames that let in more light. We offer both options. Bi-fold doors are another upgrade that adds cost but transforms how the room connects to the garden.
The number and size of windows also affect the price. A room with a single window costs less than one with full-height glazing on two sides. More glass means more money, but also more light, which matters if you're working in there all day.
Cladding
External cladding is what gives the room its appearance. Thermowood is a popular choice: it's a heat-treated timber that resists rot and looks great as it weathers. Composite cladding is a low-maintenance alternative that doesn't need painting or staining. Composite costs a bit more upfront but saves you time and money on maintenance over the years.
The cladding choice is largely aesthetic, but it does affect the total price. Both options we offer are durable and built to last.
Electrical specification
A basic electrical package with a couple of sockets and a light is cheaper than a full package with a consumer unit, multiple socket runs, USB charging points, and LED lighting throughout. We include a full electrical package as standard because skimping on electrics in a room you use every day doesn't make sense.
Some other companies list electrics as an optional extra. If you see a low base price, check whether it includes any electrical work.
Plumbing
If your room needs water, such as an annexe with a bathroom and kitchenette, the plumbing adds to the cost. This includes the internal pipework, fittings, and connection points. It's one of the main reasons annexes cost more than other room types.
Base and groundwork
Most garden rooms sit on a base system with adjustable steel feet. This works on most ground conditions and is included in our prices. If your garden has significant slopes, drainage issues, or very soft ground, some additional groundwork may be needed, but we'll tell you about that upfront rather than surprising you with it later.
What should be included in the price
When comparing quotes, make sure you're comparing like with like. Here's what should be included in a fair, fully installed price:
- Structural timber frame - Full insulation (floor, walls, roof) - Double-glazed windows and doors - External cladding - Roof covering with warranty - Base system (adjustable feet or similar) - Full electrical package (consumer unit, sockets, lighting) - External electrical connection point - Internal lining (plasterboard or cladding) - Delivery to your property - Full installation by the supplier's team - Removal of packaging and waste
If a quote doesn't include some of these items, the headline price isn't telling you the whole story. We've seen quotes that look cheap until you realise the base, electrics, and installation are all extras. By the time you add those in, the total is often the same or more than a properly inclusive quote.
Watch out for these hidden extras
Some suppliers advertise a low starting price and then add costs for things that should be included. Common extras to watch for:
Base or foundation
If the price doesn't include a base, you'll need to arrange and pay for one separately. A concrete base for a 4x4m room can cost £2,000 to £3,000 on its own. Our adjustable steel feet base system is included in every quote.
Electrics
Some suppliers provide the room but no electrical work. Hiring an electrician to wire up a garden room from scratch can cost £1,500 to £3,000 depending on the specification. Our full electrical package is included as standard.
Delivery
Some manufacturers charge for delivery, especially if you're outside their immediate area. We include delivery to all of our coverage area across Cheshire and the North West.
Installation
A flat-pack garden room that requires assembly might look cheap, but if you need to pay a builder to put it together, the saving disappears. Our rooms are installed by our own team and that's included in the price. We don't do flat-pack.
Internal finishing
Some suppliers deliver a shell with no internal lining. You then need to pay for plasterboard, painting, and finishing. That adds cost and time. Our rooms come with a finished interior as standard.
Skip and waste removal
Building generates waste. Make sure the quote includes clearing up and removing packaging and offcuts. We take everything away when we leave.
Our price list at a glance
Here are our current starting prices, all fully installed:
- The Garden Room: from £12,500 (3x3m) - The Studio: from £13,500 (3x3m) - The Home Office: from £14,500 (3x3m) - The Workshop: from £14,000 (3x4m) - The Gym Room: from £15,500 (3x4m) - The Annexe: from £28,000 (4x5m)
Every price includes the full spec: structure, insulation, cladding, roof, windows, doors, electrics, internal lining, delivery, and installation. Upgrades like underfloor heating, composite decking, and bi-fold doors are quoted separately and clearly.
How our pricing works
We keep it simple. Every price we quote is the full, installed price. It includes the base system, the structure, the insulation, the cladding, the roof, the windows, the doors, the electrics, the internal lining, delivery, installation, and removal of waste. There are no hidden extras and no surprise costs.
If you want upgrades like underfloor heating, composite decking, or bi-fold doors, we'll quote those separately and clearly so you can see exactly what each option adds. You choose what you want and the total is the total. That's it.
We price this way because we think it's the right way to do business. Nobody likes surprise bills. A fixed, fair, fully installed price means you can budget with confidence and know exactly what you're getting.
Is a garden room worth the money?
That depends on what you're comparing it to. A garden room is more expensive than a shed and cheaper than an extension. For what it gives you, a properly built, year-round, insulated garden room, we think it's good value for money.
Consider the alternatives. If you're paying £40 to £60 a month for a gym membership, that's £5,000 to £7,000 over ten years and you still don't own anything. If you're spending £150 a month commuting to an office you could work from at home, that's £18,000 over ten years. If you're renting a desk in a coworking space at £200 to £400 a month, a garden office pays for itself in three to five years.
The key is buying one that's properly built. A cheap room that doesn't work in winter, develops damp, or falls apart after five years is no saving at all. A well-built room that lasts 20-plus years and works year-round is money well spent.
A properly built garden room also adds value to your property. Estate agents increasingly list them as a selling point, and buyers actively look for them, particularly home offices. You're not just spending money, you're investing in your property and your quality of life.
Next steps
If you want a clear, honest quote for a garden room, get in touch. We'll visit your property, talk through what you need, and give you a fixed price with everything included. No pressure, no sales tricks, just a straightforward conversation about what it'll cost and what you'll get for your money. That's how we do things, and it's how we think it should be done.