Broadband Installation: What to Expect (UK Guide 2026)

For FTTC broadband, a self-install kit is usually posted to you — just plug in the router. For FTTP (full fibre), an Openreach or alt-net engineer will visit to run fibre optic cable to your home, install an ONT (Optical Network Terminal) box and connect your router. FTTP installation typically takes 2–4 hours and requires someone over 18 at home.

Standard Broadband Installation

If you are ordering FTTC (fibre to the cabinet) or standard ADSL, installation is a self-install process. Openreach activates the line remotely, and your ISP posts a router — typically arriving within 10–14 days of ordering. Plug the router into your master phone socket using the microfilter and cables provided, wait 10–20 minutes for it to sync, and you are online. No engineer visit is needed unless there is a fault on the line. Providers like BT and Sky include setup guides and apps that walk you through the process. FTTC delivers up to 80 Mbps download and 20 Mbps upload — enough for most households of 1–3 people. Setup fees are usually £0 on 18–24 month contracts. For faster options, see our fibre broadband explained guide.

Full Fibre (FTTP) Installation

FTTP (Fibre to the Premises) requires an engineer visit because fibre optic cable must be physically run to your property. For Openreach installs — covering BT, Sky, Plusnet, Vodafone and others — an Openreach engineer arrives during a booked morning (8am–1pm) or afternoon (1pm–6pm) slot. They route fibre from the nearest distribution point to your home, usually through existing underground ducts. If no duct exists, the engineer drills a small hole (approximately 10mm) through an external wall. Inside, they mount an ONT (Optical Network Terminal) box, typically near your front door or utility cupboard. The whole process takes 1–2 hours. CityFibre installations follow a similar process for Vodafone Pro and TalkTalk customers. FTTP now covers 82% of UK premises. If your home is a new build, the ONT may already be pre-installed.

What Happens on Installation Day?

An adult (18+) must be present throughout the appointment. The engineer will first survey the outside of your property to identify the best cable route — through existing ducts, along walls or overhead. They will explain the planned route and confirm the ONT location with you before starting work. Inside, the ONT is mounted on the wall and connected to the fibre cable. Your ISP's router then plugs into the ONT via an Ethernet cable. The engineer tests the connection to confirm speeds match your package — for example, a 900 Mbps package should deliver at least 700–800 Mbps over a wired test. The entire visit typically takes 1–2 hours, though complex routes (listed buildings, long garden runs) may take up to 4 hours. Once done, you can switch providers later without needing another engineer visit — the ONT stays in place.

Common Installation Delays and Compensation

Most FTTP installations go smoothly, but delays can occur. Common causes include wayleave issues (needing permission from a neighbouring landowner to run cable across their land), blocked or damaged underground ducts, and missed engineer appointments. Under Ofcom's Automatic Compensation scheme, participating providers must pay you £6.10 per day if your service is not activated by the promised date, and £30 per missed appointment. BT, Sky, Virgin Media, TalkTalk and Zen are all signed up. Wayleave disputes can push delays to 4–6 weeks or longer. Where traditional dig is impractical, Openreach increasingly uses no-dig micro-trenching — cutting a narrow slot in the pavement — to reduce disruption and speed up the process. If your installation is delayed, contact your ISP immediately and check our guide on common switching problems for advice.

Compare Broadband Deals at Your Address

Enter your postcode to see which providers and speeds are available at your home. Check your postcode now.

Frequently Asked Questions

How long does fibre broadband installation take?

FTTC self-installation takes minutes — just connect the router. FTTP engineer installation typically takes 2–4 hours, including running the fibre cable from the street to your property and setting up the ONT box inside your home.

Do I need to be home for broadband installation?

For FTTC, usually no — the kit arrives by post. For FTTP, yes — an adult (18+) must be present for the engineer visit. The engineer will need access to both the exterior and interior of the property.

Will the engineer drill holes in my wall?

For FTTP installation, the engineer may need to drill a small hole to bring the fibre cable into your home, unless an existing duct or entry point can be used. The engineer will discuss the route with you before drilling and will make good the hole afterwards.

What if my broadband installation is delayed?

If your installation is delayed, contact your provider to reschedule. Under Ofcom's Automatic Compensation scheme, major providers must pay you £6.10/day if your service is not activated by the agreed date.

Related Guides

Fibre Broadband Explained: FTTP vs FTTC · Setting Up Broadband in a New Home · How to Switch Broadband Provider in the UK · Common Switching Problems

Methodology & Sources

Information in this guide is sourced from Ofcom market reports, Openreach coverage data, ISPreview.co.uk, provider websites and independent broadband research from Point Topic and Thinkbroadband. Prices and availability are checked monthly. Speed data reflects advertised average speeds from provider Key Facts documents.