How Long Does a Leased Line Take to Install in the UK?

A leased line installation in the UK often takes around 45 to 90 working days, or 9 to 18 calendar weeks. The final lead time is confirmed following a site survey, with more complex projects involving new infrastructure, challenging routes or third-party permissions sometimes taking six months or longer.

This timeframe reflects the work involved in delivering dedicated connectivity to your premises. A leased line is designed specifically for your site, with a route planned, built and tested before the service goes live.

Starting the process early gives your organisation time to plan the installation around an office move, contract renewal or wider technology project. It also creates space to prepare your internal network and any interim connectivity requirements.

Why does a leased line take this long to install?

A leased line is different from a standard broadband service. It provides dedicated bandwidth, symmetric speeds and an SLA-backed service model, so the delivery process includes a detailed assessment of the route between the network and your building.

Some sites already have suitable fibre infrastructure nearby. Others may need new ducts, cabling or permissions before the connection can be installed. Each stage helps ensure the final service is designed around the premises and operational requirements.

The installation process usually follows four key stages:

Stage 1: Survey and feasibility

Typical timeframe: 1 to 2 weeks

The first stage is a survey of the site and the surrounding network infrastructure. This may be carried out by Openreach or an alternative network provider, depending on the service selected.

The survey confirms how the leased line can reach your premises. It considers the nearest network point, the proposed cable route, building access and any work required.

This information allows the provider to confirm the installation plan, expected lead time and any specific requirements before the build begins.

Stage 2: Wayleave and civils work

Typical timeframe: 2 to 8 weeks

Wayleave and civils work is often the most variable part of the leased line installation process. A wayleave is formal permission to install or maintain equipment on land or within a building that is owned by another party.

For example, approval may be needed from a landlord, managing agent, neighbouring landowner or local authority. The timing depends on the parties involved and the route required to reach the premises.

Civils work can include installing ducts, preparing access routes or completing work between the street network and the building. Where the connection can use existing infrastructure, this stage may be straightforward. Where a new route is needed, it can take longer to coordinate.

Stage 3: Physical build

Typical timeframe: 2 to 4 weeks

Once the route and permissions are in place, the network provider can complete the physical build. This may involve installing fibre cabling, using existing ducts or creating new routes to connect your premises to the wider network.

The exact work depends on the survey outcome. Some installations require minimal activity at the building, while others involve additional engineering work to bring fibre to the required point.

Your provider should keep you informed about key milestones, including planned site visits and any access needed from your facilities or property team.

Stage 4: Provisioning and testing

Typical timeframe: 1 to 2 weeks

The final stage is provisioning and testing the circuit. This includes configuring the equipment, activating the service and confirming that the connection is performing as expected.

The provider may install customer premises equipment, often known as CPE, before completing final checks. These tests confirm the circuit is ready to support the agreed bandwidth and service configuration.

Once the connection has passed testing, it can be handed over for use.

What can affect leased line installation times?

Every leased line is site-specific, so timelines vary. The main factors include:

• The distance to suitable network infrastructure
• The availability of existing ducts and fibre routes
• Wayleave approval from landlords, landowners or managing agents
• Building access and site readiness
• Civils work needed to bring fibre to the premises
• Network provider engineering schedules
• The complexity of the internal installation

Wayleave approval is usually the biggest variable. If the route crosses third-party land or requires permission within a multi-tenant building, the timescale relies on the relevant parties completing the approval process.

A clear point of contact, early engagement with building managers and timely access to the site all supports an organised delivery plan.

Can you speed up a leased line installation?

The core stages of survey, permissions, build and testing are essential to delivering a dedicated service. However, early planning can help create the smoothest possible process.

It is useful to begin before your current connectivity contract reaches its end date, particularly if you are moving office or opening a new site. This gives you more flexibility to schedule the installation and prepare any supporting services.

You can also help by:

• Sharing landlord and managing agent details early
• Confirming who can approve building access
• Preparing comms room space, power and internal cabling requirements
• Reviewing your existing contract notice period
• Planning how users, applications and phone systems will move to the new connection

For a guide to the pricing side, see costs for leased lines in the UK.

What can you use while waiting for a leased line?

Some sites need connectivity before the permanent leased line is ready. Interim options may include 4G or 5G connectivity, bonded mobile connections or Starlink for suitable locations.

The right temporary service depends on the site, required capacity, available coverage and the applications that need to be supported. A temporary connection can also help an organisation prepare systems and users ahead of the final migration.

This should be considered early in the planning process, particularly for new offices, construction projects, rural locations or time-sensitive moves.

How Active Digital manages the installation process

Active Digital manages the leased line installation process from initial review through to service handover and ongoing support. This includes liaising with Openreach or the selected network provider, coordinating milestones and providing a clear point of contact throughout the project.

The team begins by understanding the site, connectivity requirements and intended timescales. We can then advise on the most appropriate leased lines service, interim options and migration considerations.

With over 30 years of experience and 97% client retention, Active Digital provides practical guidance throughout the process. For more context on when dedicated connectivity may be appropriate, read leased line vs broadband for business and signs you need a leased line.

To discuss a new site, office move or planned connectivity upgrade, contact us.