How often does a new build need an EICR?

New builds are a common point of confusion because people expect an EICR straight away. In fact a new installation is certified differently, and the EICR comes later. Here is how it works.

Certificate, not a condition report

When a new home's electrical installation is completed, the electrician issues an Electrical Installation Certificate (EIC). This certifies that the new work was designed, installed, inspected and tested to BS 7671 and is safe to use. It is the document that proves the wiring met the standard at the point it was created. An EICR is a different thing — it is a periodic condition report on an existing installation, telling you how it has fared over time. You would not normally commission an EICR on a brand-new installation, because the EIC already confirms its condition as new. The EICR's job begins later, as the installation ages.

The difference is most clearly understood as certifying creation versus reporting on condition. An EIC is forward-looking proof: it says ‘this installation has just been built to the current standard and is safe to put into service’, and it is signed by the people who designed, installed and tested it, each taking responsibility for their part. An EICR is backward-looking assessment: it says ‘this installation has been in use for some years, and here is its condition today, coded against C1, C2 and C3’. One marks the starting line, the other is a periodic health check somewhere down the track. Asking for an EICR on a freshly completed new build is a category error — there is nothing to report a change against yet, which is exactly what the EIC already covers.

For a new build there is usually a further layer of assurance through Building Regulations. Electrical work in a dwelling is notifiable under Part P, and on a new home it is typically signed off either by the installer being registered with a competent-person scheme or through building control, with the EIC underpinning that sign-off. So a buyer of a new build should expect not just the EIC but evidence that the wiring formed part of the property's overall building control completion. Keeping those documents together gives the clearest possible record of the installation's pedigree — far more than an EICR could add to wiring that has not yet been in service.

General UK guidance on electrical certification. Source: Electrical Safety First; NICEIC.

When the first EICR falls due

After the initial certificate, the new build settles into the standard re-test intervals. For an owner-occupier, the Electrical Safety First guidance points to an EICR at least every 10 years, so a new home's first condition report is roughly a decade away unless something prompts an earlier check. If the property is let, the position is different from day one: the landlord duty under the Electrical Safety Standards 2020 requires an EICR at least every 5 years, and a valid report (or the initial certification accepted in its place per the current guidance) must be available for tenants — so confirm the up-to-date requirement on GOV.UK for a newly let new build.

The contrast between the two routes is worth holding onto, because it is where the ‘how often’ question actually bites. An owner-occupier of a new build can reasonably treat the first decade as covered by the original certificate, with the first EICR a distant diary entry. The moment that same property is let, the relaxed ten-year horizon is replaced by a hard five-year legal cycle, the report has to be supplied to tenants, and any remedial work carries statutory deadlines. The wiring has not changed — the duty has, simply because the property's status has. For anyone buying a new build as an investment to let, that is the key planning point: budget and diarise for the five-year cycle from the first tenancy, not the ten-year owner-occupier guidance.

Why you might still test sooner

Even a new build can warrant an earlier check in certain cases. If further electrical work is done — adding circuits, a new outbuilding supply, a major kitchen or extension — that new work should be certified in its own right rather than relying on the original EIC. If anything seems wrong early on, such as repeated tripping or a circuit that does not behave, it is sensible to have it looked at regardless of the home's age. And buyers of a near-new property who want independent reassurance can commission an EICR at any point. The 10-year and 5-year figures are maximums, not barriers to checking sooner.

Early faults on a new installation are uncommon but not unheard of, and they are worth taking seriously precisely because the wiring is supposed to be in pristine condition. A breaker that trips repeatedly, a socket that runs warm, or a circuit that behaves oddly within the first year or two could point to a workmanship issue from the original installation — and on a new build that may be covered by the developer's warranty or the installer's obligations, so flagging it promptly matters for more than just safety. In that situation the right first call is often back to the builder or the original electrician under the warranty, with an independent inspection as the route to an impartial second opinion if the response is unsatisfactory.

Keeping the right records from day one

The single most useful habit for a new build owner is to keep the founding paperwork together and safe from the outset. The Electrical Installation Certificate, any Minor Works Certificates for small later additions, the Part P or building control sign-off, and certificates for anything you add over time together form the installation's complete history. That file is what a future EICR inspector will want to see to understand what was installed and when, what a surveyor will look for, and what a buyer's conveyancer will ask about when you eventually sell. Reconstructing it years later from memory is far harder than simply filing each document as it arrives.

It also pays to diarise the first EICR date rather than relying on remembering it a decade on. For an owner-occupier, note a reminder around the ten-year mark from completion; if you ever let the property, the clock changes immediately to the five-year legal cycle and a valid report must be in place for tenants, so the date to track moves forward considerably. Treating the EIC as the start of a record you maintain — rather than a one-off document filed and forgotten — means that when the first condition report does eventually fall due, the inspector arrives to a fully documented installation and the assessment is quicker, cheaper and clearer for it.

Frequently asked questions

Sources & further reading

• Electrical Safety First — your questions answered
• NICEIC — electrical certificates explained

Figures on this page are typical UK ranges drawn from published sources and depend on your specific property. They are guidance, not a quotation. Legal duties are summarised for guidance — confirm the current position on GOV.UK.