How to Share One Fibre Connection Between Two Adjacent Landed Houses

Two terrace houses next to each other, one occupied by parents and the other by relatives. Instead of paying for two fibre subscriptions, it is technically possible to extend one connection from House A to House B.

The two practical methods are Outdoor Cat6 and a point-to-point (PTP) wireless bridge.

The bigger question is whether your ISP permits its residential service to be shared with another premises.

First: Check the ISP Terms

This is not simply a networking question.

Maxis' current Fibre Fair Usage Policy says customers must not provide network connectivity to a third party that is not at the location where the connection is installed, and also prohibits resale or charging others for the connection. (Maxis)

TIME's current terms are more explicit: the customer must not share the service without prior written approval and must not resell, sublet or make the service available to a third party, whether for profit or otherwise. (TIME)

Older published Unifi residential terms similarly prohibited sharing the service without TM's prior written approval. Unifi has since updated its Home Broadband T&C effective 26 August 2026, so customers should check the current terms attached to their own subscription rather than relying on the older document. (Unifi)

So:

Technically possible does not mean contractually permitted.

Also, not charging your relative does not automatically remove the ISP's restriction. TIME's wording, for example, covers sharing whether for profit or otherwise. (TIME)

Option 1: Outdoor Cat6

For two houses immediately next to each other, a physical Ethernet connection is the simplest design.

Use outdoor-rated Cat6, not ordinary indoor patch cable left outside. Outdoor cable is designed for environmental exposure such as UV; some products are also rated for direct burial. (CommScope)

For a permanent installation, also consider conduit, weather-sealed wall entry points and proper protection against electrical surges.

Ubiquiti recommends shielded outdoor Ethernet and grounding for outdoor installations, together with surge protection for exposed Ethernet runs. (Ubiquiti)

How to connect the second house

The cleaner arrangement is to terminate the cable at House B's own router:

This gives House B its own local network instead of placing every device in both houses on the same LAN.

Option 2: Point-to-Point Wireless Bridge

When running a cable between the two houses is difficult, use a dedicated PTP bridge.

The two radios create a dedicated wireless link between the buildings.

A system such as Ubiquiti's Building Bridge is designed specifically for building-to-building connectivity and uses a highly directional 60GHz link with a 5GHz backup connection. (Ubiquiti)

The important requirement is clear line of sight. High-frequency directional links can be affected by buildings, trees and other obstructions; Ubiquiti also notes that weather can affect 60GHz links. (Ubiquiti)

For two adjacent terrace houses, a PTP bridge makes sense when there is no sensible route for an outdoor Ethernet cable.

Outdoor Cat6 or PTP Bridge?

For neighbouring houses with an easy and safe cable route, Outdoor Cat6 is the simpler setup.

PTP is mainly useful when physically connecting the buildings is the difficult part.

Keep House B on a Separate Network

Do not simply extend House A's LAN into House B unless both households are happy to share the same local network.

A better setup is:

House B's router receives the connection through its WAN port and creates its own DHCP, Wi-Fi and LAN.

This prevents normal device discovery between the two homes and makes troubleshooting easier.

One 1Gbps Connection Is Still One 1Gbps Connection

Sharing the physical connection does not create additional bandwidth.

With a 1Gbps fibre plan:

Both homes share that same internet capacity.

If House A is downloading at 700Mbps, House B cannot independently use another 1Gbps at the same time.

The Ethernet or PTP link between the houses can be capable of high speeds, but the ISP subscription remains the bottleneck.

Don't Run Ordinary Indoor Cat6 Outside

The shortcut of taking a cheap indoor Ethernet cable, running it across the exterior wall and leaving it exposed is not a good permanent installation.

Use cable designed for outdoor exposure, protect the route where necessary and properly seal the points where the cable enters each house. Outdoor Ethernet between buildings also needs attention to surge and grounding requirements. (CommScope; Ubiquiti)

For any installation involving electrical grounding or building electrical systems, use a qualified installer.

What Should You Do?

For two adjacent landed houses:

Easy cable route:

Use Outdoor Cat6 → House B router WAN.

No practical cable route:

Use a PTP bridge → House B router WAN.

ISP does not allow service sharing:

Take a separate broadband subscription instead.

The networking itself is straightforward. The ISP's service terms should be checked before you install anything.

NetBijak's Take

Outdoor Cat6 is the straightforward choice for two adjacent houses when a safe cable route exists. A PTP bridge solves the same problem wirelessly when cabling is impractical. Before spending money on either setup, check whether your ISP permits one residential connection to serve a second premises.

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