Garden Office and Shed Wi-Fi: Getting Signal Across the Yard
Garden office Wi-Fi comes down to one question: window or wall. The dB budget across a yard, point-to-point bridges, outdoor APs, and when to just bury a cable.
The practical answer to garden office wifi starts with the path between the router and the room that has to work.
The garden office is sixty feet from the router and the Wi-Fi does not arrive. Not weak — absent. That surprises people, because sixty feet of open lawn sounds like nothing, and it would be, if the lawn were the problem.
It is not. The yard costs you very little. The two building walls at either end cost you almost everything, and a modern insulated garden office is frequently worse than the rotting wooden shed it replaced.
Two buildings, not one long yard#
Work the budget in dB and the shape of the problem becomes obvious. Start from a phone reading about -45 dBm ten feet from the router with nothing in the way, then subtract:
| Step in the path | Typical cost at 5 GHz | Running total |
|---|---|---|
| Start, 10 ft from the router indoors | — | -45 dBm |
| Out through a brick exterior wall | 10-16 dB | around -57 dBm |
| 10 ft to 60 ft across open lawn (about two and a half doublings, ~6 dB each) | 15 dB | around -72 dBm |
| In through a plain timber shed wall | 3-6 dB | around -77 dBm |
That figure is in the poor band — it connects and barely works. Now rebuild the same yard with a properly insulated office at the far end: foil-faced board, a radiant barrier or metal cladding costs 20-30 dB or more on its own, and the same path lands below -95 dBm. Effectively dead.
A window is a door; a coated window is a wall#
The highest-leverage question in this whole topic: can the two radios see each other through glass, or are they talking through walls?
- Plain single glazing costs 2-6 dB. That is a doorway, not a barrier. A path through two plain windows is dramatically better than the same path through two walls.
- Low-E, coated or double glazing costs 10-25 dB. The coating is a microscopically thin metal-oxide layer whose job is to reflect infrared. It reflects 5 GHz just as happily. If your windows were fitted in the last couple of decades in a climate with real winters or real summers, assume they are coated.
- An open window costs nothing at all, which gives you a free diagnostic.
The second half is alignment: a window only helps if it faces the office, and the office needs an opening facing back. Stand at the desk and look back at the house. If you see a window or a door, you have a wireless option. If you see siding, you have a cable project.
A decision table by distance#
| House radio to office radio | What to reach for | What to expect |
|---|---|---|
| Under 25 ft, plain glass at both ends | Try the existing router first, then a node near the house window | Often enough for calls and 4K; test before spending |
| 25-60 ft, at least one wall in the path | Outdoor-rated access point mounted under the eave, aimed at the office | A solid link if you can get power and Ethernet to the eave |
| 60-150 ft, genuine line of sight | Point-to-point bridge pair, one unit at each end | Close to wired performance; line of sight is the constraint, not the distance |
| 60-150 ft, no clear line (fence, hedge, corner of the house) | Buried Ethernet in conduit | The only option that works every day of the year |
| Over 150 ft, or mature trees in the path | Buried Ethernet, and fiber past about 328 ft | Copper tops out at 328 ft per run, indoor tails included |
Two rules apply to every row. Never chain radios — the limit is two wireless hops from the router, and a bridge already spends one, so do not hang an extender off the far end. And the office end should terminate in a real access point, not a repeater, so the office gets full-strength coverage of its own.
Plan the path before you dig#
A trench is the one item on this page you cannot undo, so it is worth spending five minutes proving you need it. Range Up will hold both buildings on a single plan: draw the house, draw the office out on the lawn at roughly the right distance, and then do the part that decides everything — set the material preset and push the Wall loss up to match the heaviest envelope on the path. If the office is lined with foil-faced panel, that is the figure that decides the answer, so set it there and read the house side as optimistic. A plain window is worth drawing as a door tile, which is roughly what it costs; a coated one is a wall and should stay one. Put the router on its real shelf and the map shows exactly where the house's signal stops, which is usually a few feet past the wall you were hoping to shoot through.
Frequently asked questions#
Will a Wi-Fi extender reach my garden office or shed?
Only over short distances with a clear glass path — roughly 25 feet or less, with plain windows at both ends. Beyond that an extender is receiving a signal already weakened by the house's exterior wall and then rebroadcasting it at reduced throughput through a second wall, so the office ends up with a strong-looking but unusable link. Past that distance, an outdoor access point, a point-to-point bridge or a buried cable are all better answers.
Does a window let Wi-Fi through better than a wall?
Much better, if the glass is uncoated. Plain single glazing costs roughly 2-6 dB, close to an open doorway, while a brick wall costs 10-16 dB and an insulated wall with foil-faced board can cost 20-30 dB or more. Low-E and coated double glazing is the exception: its metal-oxide layer reflects Wi-Fi as well as heat, costing 10-25 dB and behaving much more like a wall than a window.
What is a point-to-point Wi-Fi bridge?
It is a pair of directional radios, one mounted at each building, that carry a dedicated link across the gap rather than rebroadcasting a network. You plug an access point into the far end so the office gets its own full-strength coverage on a single hop. Its performance depends almost entirely on clear line of sight between the two antennas, not on the distance.
How far can Wi-Fi travel across a yard?
Outdoors with a genuinely clear path, distance alone is cheap — doubling the distance costs only about 6 dB — so the walls and windows at each end dominate the result. Indoors, 5 GHz is realistically good for about 50-75 ft through one or two ordinary walls, and crossing two building envelopes on top of that is what kills most yard links. With directional radios and real line of sight, the length of an ordinary yard is not the limiting factor.