Garden room floor plan — 5 × 4 m with sliding doors

Modern garden room with aluminium sliding doors, 44 mm walls

From £6,000 incl. VAT as of Sep 2026

Includes VAT and delivery to mainland England and Wales. Elsewhere in the UK, islands included, delivery is quoted for the address and kit size. The base, assembly and fit-out are not included. How our prices work

Depth is what you are paying for here. At 4 metres from the glass to the back wall, this is the first size in the group where the far end of the room is genuinely somewhere else — far enough from the doors to put a desk there and not feel you are sitting in the doorway.

20 m² in total, still one room, still sliding doors down one side. What changes is that the room now supports two things at once instead of one.

Garden room floor plan — 5 × 4 m with sliding doors — A timber garden room with 44 mm walls and an aluminium sliding door set to the front.

Download the Garden room, 5 × 4 m floor plan

Print it, email it, or bring it along when we talk through your build.

Download the full plan (PDF)

Or download just the plan drawing (no schedule):

A4 plan image (PNG)Plan image (PNG)

Each opens in a new tab, where you can view, print or save it.

Room schedule

Room	Outer dimensions	Floor area
Garden room	5.0 × 4.0 m	20.0 m²

At a glance

Footprint	5.0 × 4.0 m
Internal floor area	20 m²
Rooms	1
Largest room	Garden room · 20 m²
Doors	1
Windows	2
Usable wall	17 m

Sizes are taken from the drawing and are a starting point — everything here can be changed.Room sizes are measured to the drawn line, so they do not allow for wall thickness — the finished floor area will be a little smaller. Areas are rounded down for the same reason.

Two zones without building a wall

The arrangement almost everyone arrives at is work at the back, sitting at the front: the desk faces into the room from the rear wall, the seating takes the glazed end, and the change of use is marked with a rug and a lamp rather than a partition. It costs nothing and it can be undone on a wet afternoon.

The back of a deep room goes dark

Daylight from a glazed wall reaches roughly two and a half times the height of that glass into a room and then gives up. At this depth that leaves the rear metre or so relying on something else, which is why the plan carries 2 windows rather than glazing one side and calling it finished. Lose the rear window and the desk end quietly becomes the storage end.

Where this one usually gets adjusted

Moving the sliding doors off centre so one continuous run of wall survives for a sofa or a bookcase
Adding a rooflight over the rear zone, which is the cheapest fix for depth
Squaring it up to five by five, which costs a metre of garden and buys a properly separate second zone

44 mm walls, and at 20 m² the heat you are managing is mostly coming and going through the glazing rather than the timber. Openings on this drawing are approximate — they were read off a render, not surveyed — so put them where your garden and your neighbours suggest.

Work out where the back half goes

Open this 5 × 4 m layout in the free floor-plan tool, put a desk at the back and seating at the glass, add a window where the light runs out, and send it over. We will price making it and delivering it to you.

All done online — no showroom visit.