How to Get Wi-Fi to a Garage, Outbuilding or Backyard

Short answer: your indoor router usually can’t reach a separate building, because exterior walls and distance eat the signal. For a backyard or patio next to the house, add an outdoor-rated mesh unit or access point wired back to your network. For a detached garage, workshop or shed, get a connection into the building, ideally a cable (Ethernet, or MoCA if coax already runs there), or a point-to-point wireless bridge where no cable can go, then put a Wi-Fi access point or mesh unit inside.

Why your router doesn’t reach it

Wi-Fi has to get through your home’s outer walls, across open ground, and then through the outbuilding’s walls. Exterior construction is far harder on the signal than interior drywall. NIST’s measurements of building materials found concrete absorbed the most, and a brick wall let through only about 40% of the signal. A router that covers the house well can struggle a short distance outside.

Start by measuring what you have at the spot you care about: how to check your Wi-Fi signal strength shows you how. If it’s already weak at the back door, a wireless extender out there has little to work with.

Option 1: an outdoor mesh unit or access point (backyard, patio)

For outdoor space next to the house, an outdoor-rated unit mounted on an exterior wall is the neatest fix. These are built for weather: eero rates its Outdoor 7 at IP66 and TP-Link rates its Deco X50-Outdoor at IP65, and both can be wired back to your network. Coverage figures are the makers’ claims, and eero adds that placement and nearby building materials affect range.

Two things to know before you buy:

• Power usually comes over the Ethernet cable. eero says the Outdoor 7 needs PoE+ (802.3at) or better and that standard PoE isn’t enough; TP-Link’s outdoor Deco takes either PoE or mains power. What is PoE? explains the standards and how to supply power.
• It has to match your system. An outdoor mesh unit is designed to join its own maker’s mesh system, so check it’s compatible with what you already have.

Option 2: run a cable to the building (detached garage, workshop)

A cable gives the most reliable link, and then any indoor router, access point or mesh unit inside the building does the rest.

Ethernet. Copper Ethernet is specified for runs of up to 100 metres, which covers most gardens. Outdoor gear makers stress protection on outdoor links: TP-Link’s outdoor equipment notes say protection against lightning and static depends on proper grounding and cable shielding, and Ubiquiti sells an outdoor Ethernet surge protector for its building bridge. Running cable between buildings can involve trenching or conduit; if you’re unsure, use an installer.

MoCA. If a coaxial TV cable already runs to the building, MoCA adapters can carry your network over it without new wiring. Ethernet, MoCA or powerline compares the wired options.

Option 3: a point-to-point wireless bridge (when no cable can go)

A point-to-point bridge is a pair of directional radios, one on each building, that link the two over the air. TP-Link describes point-to-point links as a way to carry an internet connection between two distant buildings, and Ubiquiti sells a building-to-building bridge pair that comes paired out of the box.

The catch is the path between them. TP-Link notes that actual range and throughput depend on interference, obstacles and weather, so mount the two units where they can see each other, clear of trees and roofs. Each end then connects to a switch, router or access point inside its building.

Which option fits?

For a weak spot inside the house rather than outside it, start with Wi-Fi dead zones instead, and mesh Wi-Fi vs router vs extender covers adding coverage indoors.