Garden rooms · Supplied and installed by The Fifth Room
Kingspan makes the insulated panels. We do the rest: survey, base, shell, door, electrics and finish, so you get a finished room you can use in January, not a kit on a pallet. An office, a gym, a studio, a golf simulator or a guest annexe. Prefer to build it yourself? Buy the kit from us and we still help with the parts you would rather not do.
New to garden rooms? Read down the page: what a panel room is, which size suits what you want to do, what is in the kit and what we add when we install, how a job goes from survey to handover, and what planning allows. Every room has a quote button; every kit has its own page with the full specification.
Or talk it through first on 0161 524 9932
What you are buying
Most garden rooms are a timber frame with insulation pushed between the studs and cladding nailed over the top. A Kingspan kit is different: the insulation is the wall.
Each panel is a slab of Kingspan QuadCore insulation bonded between two steel skins, anthracite grey outside and white inside. The panels interlock along their edges and sit in a steel channel bolted to your base. There is no frame to build, no cavity to fill and no cladding to fix: the corners are folded in the factory, so the shell goes up as a handful of large, light pieces that two people can carry.
Because there is no frame, there are no studs interrupting the insulation every 600 mm. The wall is 100 mm of continuous QuadCore from corner to corner, which is how a 100 mm panel reaches a U-value of 0.18 W/m²K. A lower U-value means less heat escaping, and 0.18 is a figure you normally see quoted for a well-insulated house wall, not a garden building.
The same panels make the roof and the floor, so the room is insulated on all six sides and the only weak point left is the door you choose. Inside, you can leave the white steel as it is, or batten and plasterboard it like any other room. Outside, leave it anthracite or clad over it.
Not to scale. The panels interlock; the drawing shows where each one sits and what it is made of.
About 11% better than PIR
QuadCore's closed-cell core has a lambda value of 0.018 W/mK, so a panel reaches the same U-value as standard PIR with less thickness, and more of your footprint is room.
25 to 30 dB quieter
The panel cuts sound by about 25 to 30 dB, which takes a lawnmower next door down to background noise and keeps a gym session or a golf swing inside.
Built to last 40 years
Kingspan quotes a life expectancy of over 40 years for the panels. Cut edges are sealed with the lacquer in the kit, and every kit carries a 12-month manufacturer's warranty on structure, thermal performance and paint.
Heat leaves a room through its walls, roof and floor, and the lower the U-value, the less escapes. At 0.18 for the walls and 0.23 for the roof, a Medio-sized room holds its warmth well enough that a small electric panel heater is usually all it needs. It is a room you work in all year, not a summer house you abandon in November.
Spend properly on the door. Once the walls are this good, a thin, badly sealed door is where the heat goes, so choose double glazing with a decent seal. We can specify and fit one as part of an installed room.
Three ranges
Every kit uses the same panels. What changes is the roof, the height and how many rooms you get.
Garden room kits
From a 3.3 m x 2.2 m office for one to the 7.7 m x 5.5 m Garland. A low-profile roof that stays under the 2.5 m boundary height limit on most sizes. The Medio also comes with a pitched roof.
Golf simulator rooms
Five kits with the height a full swing and a launch monitor need, under a tiled apex roof. Also the right shape for a home cinema, a studio or a workshop. Kingspan recommends an installer for these, and so do we.
Modular lodge kits
A utility room, a 7.7 m studio, a twin room or a three-room lodge. Built for annexes, glamping and holiday lets, with the same panels and a shell that is ready to clad.
Which size?
Footprints come in steps of 1.1 m, one panel width. The guide below is where most people land; every kit page has the full dimensions.
A home office for one
7.3 m² is a desk, a chair, a bookcase and room to turn round. The whole kit is under 15 m², so Building Regulations do not apply, and at 2.46 m high it can sit within 2 m of a boundary.
See the PiccoloAn office with a sofa, or two desks
14.5 m² is the sweet spot for most gardens: two people working, or one desk and somewhere to sit in the evening. Still under the 15 m² threshold, with a 3.5 m opening for a wide set of sliding doors.
See the MedioA gym or a studio
A rack, a bench and a mat need length more than width. The Grande gives 5.5 m x 3.3 m, the Maximus 5.5 m x 4.4 m with 12 cm more headroom. Both sit between 15 and 30 m², so keep them at least 1 m from the boundary.
Compare the garden room kitsA golf simulator
A full swing with a driver wants around 3 m of clear height, and you need about 5.5 m of length for the screen, the hitting mat and your backswing. The flat-roof kits are 2.46 m high, so the golf rooms exist for exactly this.
See the golf roomsA guest annexe, or more than one room
The Studio is one big 7.7 m x 4.4 m space; the Twin and Triple give separate rooms. All three are over 30 m², and any room someone sleeps in needs Building Regulations approval, so plan for that from the start.
See the lodge kitsA big open room: cinema, workshop, two uses at once
The Magna is 7.7 m long and 3.3 m deep, the Maximus Plus 6.6 m x 4.4 m, the Garland 7.7 m x 5.5 m with 2.77 m of headroom. The Garland is over 30 m², so it needs Building Regulations approval, and both taller kits need to be more than 2 m from a boundary.
See the larger kitsGarden room kits
All 2.46 m high unless the card says otherwise, the same panels throughout, and a door opening ready for the sliding or bifold doors you choose. Pick a room and ask for an installed quote; the kit price on each card is the shell only, including VAT, before base, door, delivery and installation.
Shell kitKit from£7,627.60
Shell kitKit from£8,520
Shell kitKit from£8,625
Shell kitKit from£9,150
Shell kitKit from£11,280
Shell kitKit from£12,180
Shell kitKit from£12,500
Shell kitKit from£12,800
Shell kitKit from£13,480
Shell kitKit from£16,600
Shell kitKit from£12,499
Kits are listed by size. The Medio Pitched Roof is the Medio footprint under a pitched roof that is designed to be clad or tiled, and it is the one flat-footprint kit whose height depends on the roof you finish it with.
Golf simulator rooms
An apex roof in Kingspan's insulated roof tile, 3.3 m to 3.9 m to the ridge, on the same QuadCore walls and floor. Lead time 4 to 6 weeks. These are installed rooms: ask for a quote and we price the kit, base, door, electrics and build together. The kit price shown is the shell only, including VAT.
Not a DIY build. Kingspan recommends a skilled installer for the golf rooms because of the height and the tiled roof, and the Fairway Lodge needs a telehandler on delivery day, so we quote these supplied and installed. The simulator itself (screen, hitting mat, launch monitor and projector) is yours to choose, and we can point you at suppliers.
Installer recommendedKit from£13,999
Installer recommendedKit from£14,489.99
Installer recommendedKit from£14,499
Installer recommendedKit from£15,199
Installer recommendedKit from£17,899
Every golf room is over 3 m high, so under permitted development it needs to be more than 2 m from a boundary. The planning section below has the rest.
Modular lodge kits
For annexes, glamping and holiday lets. The Utility Room is the smallest kit in the range; the Twin and Triple link rooms with internal panel walls. Cladding, lining, windows and doors are part of an installed quote. The kit price shown is the shell only, including VAT.
Every lodge except the Utility Room is over 30 m², and anyone sleeping in it makes it a habitable building. Budget for Building Regulations approval and a proper foundation from day one, and talk to us before you order.
Shell kitKit from£7,627.60
Shell kitKit from£14,230
Shell kitKit from£26,250
Shell kitKit from£26,749.99
The kit
A kit is the shell: everything needed to get a weather-tight, insulated room standing on a base. It is deliberately not a finished room. Everything in the right-hand column is what turns it into one, and all of it is on our installed quote.
Delivered on Kingspan's own lorry and offloaded with you.
All of it in one written quote. Building it yourself? Pick the parts you want from us.
The kit price on each card is the headline, not the total. A finished Medio is the kit, a base, a set of sliding doors, an electrician's day, lining and flooring if you want them, delivery and the build. Budget for the room rather than the shell, and the comparison with a timber garden room becomes a fair one.
That is the point of an installed room from The Fifth Room Limited: one local team surveys the garden, sorts the base, the door and the electrics, builds the shell and hands you a finished room with one price agreed up front. If you would rather build it yourself, buy the kit from us and call us only for the parts you would rather not do.
How a job goes
This is what an installed room looks like from your side. The shell itself goes up fast: Kingspan's figure for a flat-roof kit is weather-tight in less than a day once the base is in, two to three days for the pitched Medio. The rest is the base before it and the finishing after it, and that is the part we take off your hands.
We visit, measure the space and check what decides the size: access for the lorry, the distance to your boundaries, where power can come from, and what the ground is like. No charge, no obligation.
The kit that fits, the base it needs, the door and any windows, electrics, heating, lining and flooring if you want them, and installation, as one written price. Nothing is added later that was not on it.
A flat, level base to the kit's footprint: a concrete slab, paving on a compacted sub-base, ground screws or a Swift Foundations raft, whichever suits your garden. Level matters more than anything that follows, so this is never rushed.
Kingspan delivers the kit on its own lorry. The base channel is bolted down, the floor goes in, the walls drop into the channel and interlock, then the roof, flashings and sealant close every edge. From here the room is wind-tight and dry.
The door and windows go into their openings, a registered electrician brings power in and certifies it, and the heater, lining and flooring you chose are fitted. Outside, cladding if you wanted it instead of anthracite steel.
We walk the room with you, hand over the electrical certificate and Kingspan's warranty, and leave you a finished room. Then it is yours: a desk, a rack, a sofa or a simulator.
Building it yourself? Buy the kit from us, follow Kingspan's instructions, and call us for the base, the door or the electrics if you want them done. One exception: Kingspan does not recommend the golf rooms as a DIY build because of the height and the tiled apex roof, and neither do we.
Planning and Building Regulations
In England a garden room is usually an outbuilding under permitted development, so there is no planning application, as long as it meets the conditions below. Building Regulations are a separate question that turns on floor area and use. Scotland and Wales have their own rules.
Meet all of these and no planning application is needed.
A different test, decided by size and what the room is for.
| Floor area | Kits | What it means |
|---|---|---|
| Under 15 m² | Piccolo (7.3 m²), Piccolo Plus (9.7), Piccolo Cube (10.9), Medio (14.5), Medio Pitched Roof (14.5), Utility Room (7.3) | Building Regulations do not apply unless someone sleeps in it. All are 2.46 m high, so they can sit within 2 m of a boundary. |
| 15 to 30 m² | Grande (18.1), Grande Plus (21.8), Maximus (24.2), Magna (25.4), Maximus Plus (29.0). Golf rooms: Caddy Shack (18.1), Greenspace Haven (21.8), Links Retreat (24.2), Par Four Haven (29.0) | Exempt if the room is at least 1 m from every boundary and nobody sleeps in it. The two Maximus kits are 2.58 m high and every golf room is over 3 m, so those also need to be more than 2 m from a boundary. |
| Over 30 m² | Garland (42.4), Fairway Lodge (36.3), Studio (33.9), Twin Room (43.6), Triple Lodge (43.6) | Building Regulations approval is needed whatever the use. The Garland is 2.77 m high and the Fairway Lodge 3.9 m, so both need to be more than 2 m from a boundary. |
This is a plain-English summary of the rules for England as we understand them on 25 October 2026, not advice on your garden. Your council's planning and building control teams give the definitive answer, and we check it with you as part of an installed room.
Questions
Usually not, in England. A garden room counts as an outbuilding under permitted development as long as it meets the conditions in the planning section above: single storey, no higher than 2.5 m if it is within 2 m of a boundary, not in front of the house, and not somewhere anyone lives. Listed buildings, flats and conservation areas are different, and so are Scotland and Wales. Your council's planning team will confirm for free, and we check it with you as part of an installed room.
A flat, level, solid base the size of the kit's footprint. A concrete slab, paving on a compacted sub-base, ground screws with a frame, or a Swift Foundations raft all work. The steel base channel is bolted to it, which is what holds the room down in wind. Level matters more than anything else: a base that is out by a centimetre makes every panel harder to fit.
Kingspan's figure for a flat-roof kit is weather-tight in less than a day, for a competent DIYer with a helper, once the base is in. The pitched Medio takes two to three days. After that, the door, electrics and lining take as long as your trades need; one couple who built their own kit reported eight days from first panel to finished room. If we install it, we agree the programme with you before we start.
Yes. The walls have a U-value of 0.18 W/m²K, the roof 0.23 and the floor 0.32, which is a level of insulation most houses would be pleased with. A slim electric panel heater is the usual choice for heating. The weak point is the door, so choose double glazing with a proper seal.
Yes. The panels are cut on site with a circular saw and a fine-tooth blade, and the kit includes lacquer to seal the cut edges. Plan the openings before you order, because a window needs a trim and a lintel detail, and the door opening is formed in the factory where the kit has one.
Some, yes. A panel room is airtight, which is good for warmth and bad for stale air and condensation. Trickle vents in the door or windows, or a small wall vent, keep the air moving. If you line the room, keep the air gap behind the battens open.
Through the base or a sealed gland in a wall panel, then in surface conduit or hidden behind the lining. A qualified electrician does the work: electrics in a garden building fall under Part P, so you get a certificate for your file. We arrange this as part of an installed room.
We do not recommend it. The panels are not designed for a flue to pass through them, and a room insulated this well does not need a stove to stay warm. A slim electric panel heater is cheaper to fit, safer in a small room and more than enough.
Kingspan gives a 12-month manufacturer's warranty on structure, thermal performance and paint, and quotes a life expectancy of over 40 years for the panels. Cut edges must be sealed with the lacquer supplied. Installation work we do is covered separately, in writing, in your quotation.
Every price on this page and on the kit pages includes VAT. Delivery is charged separately and depends on your postcode: Kingspan delivers on its own lorry, with the driver offloading, and we confirm the charge with you before dispatch. Lead times are 2 to 4 weeks for the garden room kits and 4 to 6 weeks for the golf rooms.
Get an installed quote
A no-obligation quote for the finished room: kit, base, door, electrics and installation, in writing after a survey. If you would rather build it yourself, say so and we quote the kit and whichever parts you want help with.
Prefer to talk? Call 0161 524 9932.
The Fifth Room Limited supplies and installs the rooms. The kits and panels are made by Kingspan Limited at Holywell, Flintshire, and carry its 12-month manufacturer's warranty.
