Twin-skin one-bedroom annexe floor plan — 6 × 5.5 m

Twin-skin log cabin, 44–100–44 mm walls

From £14,500 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

Two log walls with a 100 mm cavity between them instead of one wall of solid timber. That is the only thing separating this plan from half a dozen others of a similar size, and it is the thing that decides whether an annexe is somewhere a relative visits or somewhere they live.

Rooms come to 25 m² inside a 6 × 5.5 m building. The strip across the front is covered veranda under the same roof, and a twin-skin wall is deeper than a single log wall — so a warm annexe always gives back a little floor to the thing that makes it warm.

Twin-skin one-bedroom annexe floor plan — 6 × 5.5 m — A twin-skin log cabin: two log walls with a cavity between them, one roof carried over the front veranda.

Download the 1 bedroom, 6 × 5.5 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
Bedroom 1	2.8 × 3.0 m	8.4 m²
Kitchen / Living room	3.2 × 4.3 m	13.7 m²
Bathroom	2.8 × 1.3 m	3.6 m²
Covered outdoor
Veranda	6.0 × 1.2 m	7.2 m²

At a glance

Footprint	6.0 × 5.5 m
Internal floor area	25 m²
Bedrooms	1
Bathrooms	1
Rooms	2
Largest room	Kitchen / Living room · 13 m²
Doors	3
Windows	4
Usable wall	47 m
Covered veranda	7 m²

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.

What twin-skin actually means

44 mm of log outside, 44 mm inside, and 100 mm of cavity between the two. The cavity does the work: it takes insulation, and it holds the inside face of the building away from the outside face. A single 44 mm wall does neither, whatever you line it with afterwards.

The difference shows up in February and on the electricity bill, not on a good day in May. If the annexe is for a parent who is moving in, or for a let you want occupied outside the summer, this is the wall specification to start from and work the layout around.

Small rooms, and deliberately so

2 rooms in 25 m² means none of them is big — the living room is the largest at 13 m². Read it as a plan for one person or one couple, not a small family. Bedroom and shower room take one side, kitchen and living the other, and both internal doors sit on the same dividing wall.

Before you change anything

Taking the veranda back inside the walls, which is the quickest route to a bigger living room
Squaring the shower room up — it is the shallowest room here and the first one to feel tight
Moving the bedroom door so the bedroom opens off the living room rather than off the kitchen

Doors and windows on the drawing are indicative. On a twin-skin building they matter more than usual, because every opening is a hole through both skins and the cavity between them — so settle how many you actually want before you argue about where they go.

Start from the warm one

Open the 6 × 5.5 m layout, pull the veranda inside if you would rather have the floor area, and send it over for a price on making and delivering it in 44–100–44 mm twin skin.

All done online — no showroom visit.