“Second homeownership within North Yorkshire is significant,” the council says - and it’s been eating into homes for local families across the Dales and coast. The same story runs through parts of Cumbria and Northumberland, where holiday lets and boltholes push prices beyond local wages. (northyorks.gov.uk)

On Tuesday 14 April 2026, ministers signed new regulations to tidy up how the second‑home council tax premium is applied when councils are merged, with the rules taking effect on Friday 8 May 2026. In plain terms: if a new unitary covers places where some of the old districts had already set the premium and others had not, any move to switch it on in the remaining patch now counts as a first‑time decision for those areas - and that triggers the mandatory year’s notice.

The power to double council tax on second homes arrived last year under the Levelling‑up and Regeneration Act 2023, which inserted section 11C into the 1992 Act. The law lets billing authorities in England add up to a 100% premium, but the first determination has to be made at least a year before the financial year it applies to. (legislation.gov.uk)

This amendment deals with the awkward edge cases created by local government reorganisation. Where at least one predecessor district made a determination before vesting day but others did not, a successor council’s later decision for those untouched areas will be treated as the first determination for that part of the map - so residents get the full year’s warning, and finance officers get legal certainty to plan budgets and consult properly.

There’s clear Northern relevance. North Yorkshire Council has already brought in a 100% premium across the county from April 2025, citing the pressure second homes place on supply. In the Cumbrian unitaries, Cumberland’s budget documents confirm the same 100% premium across 2025/26 and into 2026/27. (northyorks.gov.uk)

So what counts as a second home? Government guidance describes a substantially furnished dwelling that is not anyone’s sole or main residence, sometimes called “dwellings occupied periodically”. Councils also explain it in plain English: holiday homes and boltholes that are used, but not lived in full‑time. (gov.uk)

Some properties can be excepted - for example, certain job‑related homes or places with planning conditions that restrict year‑round occupation - but the detail sits in each council’s policy and the statutory guidance. Owners should check notices and consultation pages closely before any switch‑on dates. (gov.uk)

The money raised stays local. As with all council tax income, any premium is fully retained by billing authorities and their precepting bodies; Cumberland’s 2026/27 guide sets out how this sits alongside its core council tax and adult social care precept. (gov.uk)

The timeline still matters. Because a “first” determination must be a year ahead of the relevant 1 April, a successor council that wants to extend a premium into parts of its patch that never had one will need to publish that decision in good time - not least to avoid disputes seen elsewhere around notice and fairness. The Local Government Association has been blunt about the stakes: “There is a desperate need for more affordable housing… [and] charging a council tax premium… is one way of encouraging owners to bring these properties back into permanent use.” (gov.uk)

For northern households, the upshot is predictability. If your town is folded into a new unitary and the premium wasn’t in place before, you should get a full year’s warning before anything changes. For council leaders, the message is the same: line up determinations early, publish clearly, and keep residents in the loop. The policy space moves quickly - but the new rules make the timetable clear.