A clear, open interior
The room has no internal partitions on the supplied layout. The front glazing brings daylight into the space and connects it to the garden path.
CENTRAL LONDON · CRANED GARDEN ROOM
A garden room built off site.
Craned into Central London.
Restricted access. A steel base. One carefully planned arrival.
Costi and the TRJ team built this SIP garden room at a separate yard, then transported and craned it into an established London garden. Siberian larch, anthracite glazing and clay-plaster walls give the finished space a warm, simple character.
- Location
- Central London
- Specified room size
- 5.0 m × 3.15 m
- Construction
- SIP room on a steel frame
- Installation
- Built off site · delivered by crane
01 / THE BRIEF
A new garden space.
A different way in.
The challenge was getting a complete garden building into a site with limited access. The agreed approach was to construct the room elsewhere and crane it over the garages into the garden, rather than assemble the whole building in its final position.
A purpose-made steel base supported the SIP structure during the off-site build and transport. Screw-pile foundations were specified for the garden position. The photographs record the fabrication yard, collection, road transport and the room suspended above the garden during installation.
The finished frontage faces the established planting and paved path. Vertical larch slats sit around central French doors and two tall windows, while the darker rear and side finishes recede against the boundaries.
02 / ORIGINAL FLOOR PLAN & STEEL FRAME
Designed as a room.
Built to be moved.
The original layout shows one open room, with central double doors and a fixed window on each side. The order specifies a nominal 5.0 m × 3.15 m room at 2.65 m high.
A separate steel-base design
The metal-frame drawing records a 4.9 m × 2.9 m base with transverse members, support plates and removable lifting points. Its footprint is distinct from the room size in the order.
Sizes above follow the order specification. The original layout and frame drawing retain their own detailed dimension labels.
View the original steel-frame drawing
The project-specific drawing below records the steel base beneath the SIP room.
03 / SPECIFICATION & FINISHES
Natural larch outside.
Clay plaster inside.
The exterior combines Siberian larch battens on the front with rendered board finishes to the other elevations. Anthracite aluminium glazing frames the view back into the garden.
Inside, the agreed finish was a 2 mm clay-plaster layer over plasterboard, left without paint. Laminate flooring and white skirting complete the simple interior.
Structure and foundations
SIP floor, wall and roof panels form the room on a welded steel base. The order specifies screw-pile foundations at the installation site, with the complete building transported from the separate build location.
Roof and rainwater
An EPDM membrane covers the roof. Rear drainage runs to a side downpipe and a 350-litre water butt, with black round guttering and downpipe.
Doors and windows
The order specifies 1,600 mm × 2,100 mm aluminium French doors and two fixed 700 mm × 1,700 mm windows in anthracite, with toughened argon-filled glazing and trickle vents.
External wall finishes
Siberian larch slats finish the front. The other elevations use cement-particle board with the agreed render upgrade. Membrane, battens and a ventilated wall arrangement sit behind the external finish.
Lighting and electrics
The electrical scope includes an independent consumer unit with RCBO and surge protection, two double sockets, two internal lights, two external wall lights and an extractor fan. The customer supplied the light fittings.
Interior comfort
Clay plaster, laminate flooring and white skirting finish the room. A spur and socket were specified for the customer-supplied wall radiator, alongside the armoured supply cable and final electrical connection.
04 / THE BUILD & CRANE INSTALLATION
From a steel frame
to a garden room.
01 · OFF-SITE CONSTRUCTION
Starting with the base
The painted steel frame receives the insulated floor panels. SIP walls, roof, glazing and finishes are assembled at the separate yard.
02 · TRANSPORT TO LONDON
Moving the complete room
The finished room is collected by the lifting and transport vehicle and brought to the street beside the garden.
03 · INTO THE GARDEN
Lowering into position
The installation photographs show the room suspended over the garden before being lowered into its prepared location, beyond the garages.
05 / CUSTOMER FEEDBACK
Care in the details.
“Throughout the process Costi has been very meticulous, hard-working, diligent and prompt. He had solutions for every construction challenge.”
The customer’s feedback on the original project page praised the quality of the finished room and the team’s attention to the chosen materials.
06 / PROJECT PHOTOGRAPHS
The build, the lift
and the finished room.
Select any photograph to see the complete image. Use the arrows to move through the collection and Back to page to return.
View the remaining project photographs
07 / PROJECT QUESTIONS
A few useful answers.
Why was this garden room delivered by crane?
Access to the garden was restricted. The room was constructed at a separate site on a steel base, transported to London and craned over the intervening garages into the prepared garden position.
What size was specified?
The order specifies a nominal 5.0 m × 3.15 m room, 2.65 m high. The steel-base drawing separately records 4.9 m × 2.9 m. The original layout and base drawing retain their own dimension labels.
What finishes were chosen?
The project combines Siberian larch frontage, anthracite aluminium French doors and two fixed windows, an EPDM roof, clay-plaster interior walls and laminate flooring.
Was the garden room built on site?
The SIP structure and finishes were assembled at an off-site yard. The project photographs follow the steel frame, floor and wall assembly, transport and final crane installation.
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