New build with no broadband? what to do when Openreach isn't connected yet

You've collected the keys, the boxes are unpacked, and you cannot get a broadband order to go through. The availability checker doesn't recognise your postcode, or there's no fibre modem on the wall, or a provider tells you there's no line to the property. This is one of the most common frustrations of buying a brand new home, and the good news is it usually resolves. The bad news is that the fix rarely sits with you, and knowing exactly who to chase saves weeks.

Here is the short answer. On most new developments the physical connection is arranged between the developer and Openreach, not by you or your chosen provider. Until Openreach has routed fibre to your specific plot, registered the address on its database, and (for full fibre) installed the ONT, no provider can sell you a working service. Your job is to identify which of those pieces is missing and push the responsible party to complete it.

Why new build homes often have no broadband at first

A new build starts life as a blank space on the network. Even when neighbouring houses on the same development already have Openreach ONTs fitted and are online, your individual plot can still be missing its own fibre, its own address record, or its own equipment. These are separate steps, and they don't all happen at the same moment.

Under the industry arrangement between Openreach and the Home Builders Federation, fibre based broadband is offered to all new developments either free or through a co-funded model. Openreach estimates that more than half of all new build properties can be connected to fibre free of charge to the developer, with an online planning tool and a published rate card telling housebuilders whether a contribution is needed. The key point buried in that arrangement is timing: the HBF stresses the need to plan for connectivity early in the development. When a developer leaves it late, or a single plot slips through the process, you inherit the gap.

Check what's actually missing

The forums are full of people describing the same symptom but with three completely different causes. Work out which one applies to you before you start making calls.

No ONT installed. If other houses on the site have their white Openreach ONT (the fibre modem) fitted but yours doesn't, the fibre may not have been routed to your property yet. With no ONT and no line record, no provider can place an order. That's why an attempt to order comes back with, in effect, the computer says no.

Address not recognised by availability checkers. You type your postcode or full address into a provider's checker and nothing comes up. Until the address is listed on the underlying wholesale database that every Openreach provider queries, none of them can supply broadband there. Sometimes the deeper problem is that the postcode isn't yet on the Royal Mail postcode database at all, which is normally something the developer should have arranged.

Registered but not provisioned. The ONT is on the wall and the address appears, but there's still no live service. In this case the line typically just needs to be activated once you place an order with a provider, which is the most straightforward situation of the three.

To see which camp you're in, run your full address through the Openreach availability checker. It queries the same database that providers such as Sky use, so if it can't find you, no retail provider will be able to either.

Who is responsible: developer, Openreach and your ISP

This is the split that causes most of the confusion, so let's be blunt about it.

The developer arranges the network connection for the site. They register the development with Openreach, work through the planning tool and rate card, and are the party with a direct line to Openreach dealing with the site installation. If the fibre, the ONT or the address record is missing, the developer is almost always the one who can get it moving. As the seller of the property, they are the natural point of pressure, especially before you complete.

Openreach builds and owns the physical network. They route the fibre, register addresses and install ONTs. But as a member of the public you generally cannot instruct Openreach directly to expedite a new build installation. That contact runs through the developer or through your chosen provider.

Your internet service provider (Sky, BT, Plusnet, and so on) sells you the retail broadband package and places the order across the Openreach network. They can activate a line once the infrastructure exists, but they cannot conjure a connection where Openreach has not yet built one.

So if a builder tells you to "just contact Openreach to speed it up," they are, politely, passing the buck. In most cases only they can chase Openreach about the site.

Step by step: what to do to get connected

1. Run the Openreach availability checker with your full address to confirm what shows up. Screenshot the result.
2. Check the Royal Mail postcode database. If your postcode or address isn't recognised there, that gap needs closing first, because the broadband databases feed off it. You can submit or update your address details through Royal Mail's address update service.
3. Go back to the developer in writing. Ask them directly whether the plot has been registered with Openreach, whether fibre has been routed to it, and when the ONT will be installed. Ask for the reference or contact they hold with Openreach for the site.
4. Report it to Openreach using their new build form. Openreach has a dedicated form for copper or fibre broadband problems in new build properties. This is the right route for a brand new home, rather than the general "missed in my road" fibre availability form.
5. Try placing an order with your preferred provider once the address appears in the checker. If the ONT is present and the address is live, this may be all that's left to do.

If you're still pre-completion, raise all of this before you exchange contracts. Your leverage over a developer is far greater while their money is still on the table.

How to get your address added to the Openreach database

Addresses reach the Openreach and wholesale broadband databases partly on the back of the Royal Mail postcode file. If your postcode isn't yet listed with Royal Mail, that's usually the developer's responsibility, but you can also submit the details yourself through Royal Mail's receiving mail address update service. Once the address is recognised there and Openreach has completed its build to the plot, it should begin appearing in availability checkers. Keep re-running the Openreach checker every few days so you know the moment your property goes live.

How long it typically takes

Be realistic: timescales on new builds vary enormously depending on how far along the site's network is and whether the developer planned connectivity early. If fibre is already running past your door and you just need the plot completing, it can be relatively quick. If the address isn't registered and no fibre has reached the plot, you could be waiting weeks while the developer and Openreach work through the build. The single biggest lever on speed is a developer who engages early and holds Openreach to a date, which is exactly why chasing them matters more than chasing anyone else.

Staying online while you wait

None of this helps you send an email tonight, so bridge the gap with a mobile connection. A 4G or 5G home broadband router uses the mobile networks rather than the fixed Openreach line, so it works even when your property is a blank on the fibre map. Coverage from the mobile networks reaches the vast majority of the UK, and a plug-in router or a mobile hotspot from your phone can keep you working, streaming and video-calling until the fixed connection lands.

Before committing, check mobile coverage at your specific address, since a brand new estate on the edge of a town can be patchy. Look for a rolling monthly deal rather than a long contract, so you're not tied in once your fixed broadband finally goes live.

When and how to escalate or complain

If the developer keeps deflecting and Openreach's new build form produces nothing, escalate on two fronts.

First, push the developer as the vendor of the property. Put your requests in writing, keep a record of dates, and make clear you expect the connectivity they were responsible for arranging. Before completion this carries real weight.

Second, once you have an active order with a provider, any delays or failures to connect become the provider's problem to chase across the Openreach network on your behalf. Ask them to raise it formally and, if they don't resolve it, use their published complaints process. Keep your screenshots of the availability checker and a note of every call and reference number, because a clear paper trail is what turns a stalled connection into a resolved one.