The Garden Office Log Cabin: Size, Wall Thickness and Spec for Year-Round Work

If you work from home most of the week, you already know the problem: the kitchen table is not an office. A garden office log cabin gives you a twenty-step commute, a door you can close at six o'clock, and a dedicated space that video calls, tax authorities and your own concentration all treat as a real workplace.

The difference between a garden office you love and one you abandon in November comes down to specification. This guide walks through the decisions that matter—size, wall thickness, heating, electrics, internet, acoustics, position and permits—so the cabin you order in spring is still comfortable in midwinter.

What Size Garden Office Cabin Do You Need?

Start from how many people will work in it, then add room to move. Guidance across garden building specialists is remarkably consistent, and it matches what we see in customer orders.

One desk: from about 3 × 3 m

A cabin of roughly 2.5 × 2.5 m to 3 × 3 m comfortably takes a single desk, an office chair and shelving. Around 9 m² of floor area is the sweet spot for one person: enough for a 160 cm desk, a bookcase behind you for video-call backdrops, and space to push the chair back without hitting the wall. Smaller pods exist, but below roughly 6 m² you are working in a booth, not an office.

Two desks or a meeting corner: 4 × 3 m to 4 × 4 m and up

For two workstations, plan on at least 4 × 3 m; a 4 × 4 m cabin (16 m² external) gives two people generous desks plus storage without feeling cramped. If you host clients, want a small sofa or run a business from the building, look at 5 × 4 m and larger—at that point the cabin can be zoned into a work area and a meeting area.

Two details people forget when comparing sizes:

• External vs internal dimensions. Advertised sizes are usually external; walls, especially thicker ones, reduce usable floor area by several tens of centimetres in each direction.
• Circulation space. Allow 60–80 cm of desk depth and about 1 m behind the chair. A printer, filing drawers and a heater all claim floor area too.

Wall Thickness: The Decision That Makes or Breaks Winter Use

Wall thickness is the single biggest factor in whether your garden office is a year-round workplace or a three-season one. The pattern across the industry is clear: thin summerhouse walls of 28 mm are fine for warm months, but an office you sit in for eight hours a day needs more.

• 44 mm is the realistic minimum for year-round office use—and only when paired with an insulated roof and floor and double-glazed windows and doors. Rigid insulation boards fitted between the floor joists and roof rafters stop the two biggest heat-loss routes.
• 58 mm or 70 mm walls are the comfortable choice for daily sedentary work. Sitting still at a computer, you feel cold sooner than you would moving around a workshop, and thicker logs hold heat noticeably longer, cutting winter heating bills.
• Double-layer 44+44 mm walls with an insulated cavity (typically 100 mm) deliver the best thermal performance of all—the right call in northern climates or if the office doubles as a guest room.

Satus Baltic builds every model in 28, 44, 58 or 70 mm, plus double-wall 44+44 and 70+70 mm versions. For a deeper comparison of how each option performs, read our guide to choosing the right wall thickness.

Heating and Electrics: Simpler and Cheaper Than You Expect

A garden office needs a proper power supply, not an extension lead through a window. The standard approach is a dedicated circuit run from your house consumer unit through steel-wire armoured (SWA) cable, buried in a trench—commonly around 600 mm deep, or shallower in protective ducting. This connection work must be done by a qualified electrician; in England and Wales, for example, it falls under Part P of the Building Regulations. Your cabin supplier builds the room; a local electrician connects it.

Plan the electrical layout before ordering: sockets at desk height on the desk wall, a socket for the heater, lighting on a separate switch, and a spare double socket for the kettle you will inevitably add.

Here is the good news about heating: a small, well-insulated room is genuinely cheap to keep warm. An office of 9–16 m² with 44 mm or thicker walls, an insulated roof and floor and double glazing typically needs only a small electric panel heater or oil-filled radiator. Put it on a thermostat and a timer so the room is warm when you sit down at eight, and it cycles off for much of the day once the space is up to temperature. Compared with heating a whole house so that one person can work in one room, a well-specified garden office often works out as the economical option.

Getting Internet to a Garden Office

Test before you dig. Stand where the cabin will go and check your home Wi-Fi on a laptop; in many gardens the existing signal, or a single mesh node in the house window facing the cabin, is already enough for calls.

The most reliable solution is the simplest: run an outdoor-rated Ethernet cable in the same trench as the power supply (in its own ducting, separated from the electrical cable) and put a small access point inside the office. You get wired-grade speed and rock-solid video calls. Alternatives include point-to-point wireless bridges between house and cabin, and a 4G/5G router as either the main connection or a backup for important meetings.

Acoustic Comfort: Why Log Walls Suit Deep Work

Solid timber walls have real mass, and mass dampens sound. A log cabin office is noticeably quieter inside than a thin-panel shed, and thicker walls improve acoustic as well as thermal insulation—one more argument for 58–70 mm if your street is busy. Double glazing helps on the noise front too.

Inside, treat echo the way podcasters do: a rug on the floor, curtains, and a full bookshelf behind your desk make your voice sound warmer on calls and stop the room ringing. Position the building away from trampolines, air-source heat pumps and the neighbour's dog run if you can.

Position and Natural Light

Orientation affects comfort every single day. A north-facing window gives even, glare-free light that screens love; south-facing glazing brings cheerful sun but needs blinds and can overheat a small room in summer. Many people place the main glazing to the side of the desk rather than directly behind or in front of the screen.

Practical placement rules: keep at least 1 m from boundaries so you can maintain the walls (and, in many areas, to stay within permit-free rules), avoid the drip line of large trees, and make sure the trench route from house to cabin is realistic for the electrician.

Do You Need a Permit for a Garden Office?

In most places, no—within limits. Small single-storey garden buildings are commonly permit-free: in the UK, for instance, a garden office generally falls under permitted development if it stays behind the house, covers no more than half the garden and is no taller than 2.5 m when within 2 m of a boundary, and separate building-regulation thresholds commonly apply above 15–30 m². Similar size-based exemptions exist in most European countries. Rules differ by municipality and change over time, so always confirm with your local building authority before ordering—this article is general information as of 2026, not legal advice. You will find country-specific detail in our blog, including a full UK and Ireland guide.

Satus Baltic Models That Make Excellent Offices

Every model in our catalog can be configured with office-friendly wall thicknesses, double glazing and custom window placement, and we deliver across Europe from our factory in Vydmantai, Lithuania. Three popular starting points:

• Bron 3 × 3 m – the classic one-person office: 9 m² for a desk, chair and shelving, compact enough for almost any garden.
• Unna 4 × 4 m – room for two workstations, or one desk plus storage and a reading chair, with space left to breathe.
• Brenzo 5.95 × 5.95 m – a proper garden studio: work area, meeting corner and storage under one roof, ideal if clients visit or two people work full-time.

Because we manufacture to order from FSC-certified timber, any model can be adapted—thicker walls, an extra window on the north side, a partition wall, or a fully bespoke design.

Ready to Plan Your Garden Office?

Browse the full range in our catalog, or tell us how you work—one desk or two, which country, year-round or three-season—via the quote form. Our team prepares a personal, human-made quotation within one business day, including wall thickness and glazing recommendations for your climate.