New Build Broadband: Full Fibre, Provider Choice and What to Check Before You Move In

Broadband is easy to forget when you are comparing kitchens, incentives, gardens and housebuilder ratings. Yet a poor or delayed connection can become one of the most disruptive problems in the first weeks of living in a new home, especially if you work from home.

A new build can have modern fibre infrastructure and still create practical problems at move-in. Your address may not yet appear in a provider's database, the estate may initially be served by only one network, or the physical connection may be installed before a retail service can be ordered.

Do new builds have to come with full-fibre broadband?

The legal position depends on where the property is located. In England, changes to the Building Regulations came into force on 26 December 2022 introducing requirements for gigabit-ready physical infrastructure in new dwellings and, subject to a cost cap and other conditions, a gigabit-capable connection.

Government guidance says developers in England must install the physical infrastructure needed for gigabit-capable connections and, subject to a £2,000 cost cap per dwelling, install a functional gigabit-capable connection. Where that cannot be achieved within the cap, the next fastest connection available may be required instead.

You can read the current rules in the government's new build connectivity guidance. Building regulations are devolved, so buyers outside England should check the rules applying in that nation.

What does gigabit-ready actually mean?

Gigabit-ready does not necessarily mean you can move in and immediately order a 1Gbps package from any provider you choose.

The term is about infrastructure being capable of supporting gigabit connectivity. The retail service you can buy still depends on which network has been built to the estate, whether the address is live in provider systems and which internet service providers use that network.

Why can a new build have only one broadband provider?

A new development may initially be connected to one physical network. That network might be Openreach, an alternative full-fibre operator or another infrastructure provider.

The network and the retail broadband provider are not always the same thing. Some networks support several internet service providers, while others have a smaller retail choice.

Do not assume that because your current provider serves the surrounding postcode it will be available on the new estate.

Ask about the network, not just 'fibre'

• Which physical broadband network serves this plot?

• Is the connection fibre to the premises?

• Is the plot already live on the network?

• Which retail providers can currently supply the address?

• What speeds are available to the exact plot?

• Where will the broadband connection terminate inside the home?

• Does the house contain an optical network terminal or other network equipment?

• Are there any activation steps still outstanding?

Ask about the exact plot rather than the development generally. Early and later phases of a large site can sometimes have different infrastructure arrangements.

Why is my new build address missing from broadband checkers?

A brand-new property can exist physically before every commercial database recognises the address.

Broadband providers often rely on address data to match the property to the correct network record. If the address has not propagated through the relevant systems, an availability checker may say that the home does not exist or that no service is available.

Royal Mail notes that a new-build address may not yet have been added to its Postcode Address File. You can check the property using the Royal Mail Postcode Finder and report a missing new-build address if necessary.

When should you check broadband availability?

Check before reservation if broadband is important to your work or household, then check again before exchange and a few weeks before completion.

Do not wait until you have the keys if you rely on a stable connection for remote work, security systems, streaming or smart-home equipment.

Can you order broadband before completion?

Sometimes, but only once the address and network record are sufficiently live for an order to be accepted.

If the provider says the property cannot be found, ask whether the developer has completed the required address and network handover information rather than repeatedly submitting the same online order.

What equipment might already be in the home?

A full-fibre property can have an optical network terminal, often called an ONT, installed inside the home. This is the equipment that terminates the fibre connection.

The ONT is not necessarily the same thing as the Wi-Fi router. Your chosen provider may still supply a separate router.

During your home demonstration or handover, ask the developer to show you the network termination point and any communications cupboard.

Broadband speed vs Wi-Fi speed

Do not confuse the speed delivered to the property with the speed a device receives over Wi-Fi.

A full-fibre line can be working correctly while a laptop in a distant bedroom receives a much slower wireless connection because of distance, walls, interference or router placement.

What if the development has limited provider choice?

A new estate can initially have a limited choice of network or retail providers. This does not necessarily mean the broadband itself is poor, but it can affect price comparison and your ability to keep an existing provider.

Before reserving, ask whether residents are free to order from several providers or whether the estate currently relies on one network.

Broadband in a new build apartment

Apartments can be more complicated because the connection passes through communal parts of the building.

Ask which network serves the block, whether the connection is already live to the individual flat and whether any building-management permission is needed for future installation work.

What if you move in before broadband is active?

• Check mobile coverage before completion.

• Ask your mobile provider about tethering or a temporary data allowance.

• Consider a 4G or 5G router if coverage is suitable.

• Download important work files before moving.

• Do not assume a temporary mobile solution will support every household need.

Broadband questions to ask before reserving

• Which network serves the exact plot?

• Is it full fibre to the premises?

• Which providers can I order from today?

• What speeds are currently available?

• Is the address live in provider databases?

• Where will the connection terminate inside the home?

• Are Ethernet or data points included?

• Does the estate currently have only one network?

• What happens if the connection is not active by completion?

The bottom line

A new build can be technically gigabit-ready and still create a frustrating broadband experience if the address, network activation or provider choice has not been checked in advance.

Treat broadband as part of the purchase research rather than a utility you will sort out after moving in. Ask which network serves the exact plot, check the address with providers and place your order as early as the network allows.

Use our new build viewing guide and new build handover checklist alongside these connectivity checks.