The true cost of owning a second home in the UK in 2026
A £400,000 second home in Cornwall costs around £30,000 in Stamp Duty alone before the new owner picks up the keys — before mortgage payments, before insurance, before the council tax bill that, from April 2025, many coastal authorities have doubled.
This is what's changed for second-home owners in 2026, and what the full first-year cost stack actually looks like, using Homecost data from HM Land Registry, the 2026–27 council tax tables and the Bank of England's latest quoted mortgage rate.
What changed for 2026
Two policy shifts have hit second-home owners in the last 18 months.
Higher Stamp Duty surcharge. From 31 October 2024 the additional-property surcharge on Stamp Duty Land Tax in England and Northern Ireland rose from 3% to 5% on the full purchase price of any additional dwelling over £40,000 (HMRC). The surcharge sits on top of the standard SDLT slabs. There is no second-home equivalent of first-time buyer relief.
Council tax premium of up to 100%. From 1 April 2025, billing authorities in England gained powers under the Levelling-up and Regeneration Act 2023 to charge a premium of up to 100% on furnished second homes — properties that are no-one's sole or main residence. Many of the councils that voted to apply the maximum are the same coastal and rural authorities where second-home buyers concentrate (gov.uk: council tax on second homes).
Together, these two changes mean the cost of owning a second home — not just buying one — has stepped up materially for 2026 buyers.
The full 2026 cost stack
There are six line items a second-home buyer in England needs to budget for in year one. The first three are upfront; the last three repeat annually.
| Line item | Type | Where the rules sit |
|---|---|---|
| Standard SDLT | One-off | England & NI slabs (HMRC) |
| 5% additional-property surcharge | One-off | England & NI (FA 2003 Sch 4ZA) |
| Conveyancing, survey, search fees | One-off | Solicitor & surveyor quotes |
| Mortgage payments | Annual | Lender rate + LTV |
| Council tax (often with premium) | Annual | Billing authority |
| Insurance + running costs | Annual | Insurer + Ofgem cap |
There is no published HMRC concession that removes the 5% surcharge for buyers who let the property out (although properties operated as a qualifying furnished holiday letting business may sit inside a different tax regime — that turns on use, not purchase, and is being progressively narrowed by HMRC). Speak to a qualified adviser before acting on any structuring plan.
£400,000 Cornwall second home — worked example
Cornwall's average residential sale price in 2025 was £363,421 across 4,967 transactions on HM Land Registry's Price Paid file (Homecost data, fetched 13 May 2026). A £400,000 budget is realistic for a three-bedroom property in Falmouth (TR11 average £431,963 across 523 sales in 2025) or a smaller cottage in the Padstow / Rock area (PL27 average £528,184 across 241 sales).
Year-one cash outflow at £400,000
Upfront — Stamp Duty Land Tax (England, additional property)
| Slab | Rate | Tax on band |
|---|---|---|
| £0 – £125,000 | 0% (standard) | £0 |
| £125,001 – £250,000 | 2% (standard) | £2,500 |
| £250,001 – £400,000 | 5% (standard) | £7,500 |
| £0 – £400,000 | 5% (additional-property surcharge) | £20,000 |
| Total | £30,000 |
That is a 7.5% effective tax rate on the purchase — versus 2.5% for a main residence at the same price. The surcharge alone is £20,000. Standard SDLT figures cross-checked against HMRC's residential rates table.
Upfront — legal and survey
A conveyancer's fee plus searches typically runs £1,500–£2,500 for a freehold in Cornwall; a Level-2 RICS HomeBuyer Report adds £400–£800; a Level-3 Building Survey on an older stone cottage £600–£1,500. Budget around £3,500 inclusive at this price point. Final quote varies by firm — get fixed-fee written estimates before instructing.
Annual — mortgage
The Bank of England's quoted rate for a 75% LTV five-year fixed residential mortgage was 4.32% in April 2026 (BoE statistical release). Second-home and holiday-let mortgages typically price above this benchmark — lenders treat them as higher-risk — but how far above depends entirely on the lender's product. As an illustrative floor, a £300,000 mortgage at 4.32% on a 25-year capital-repayment basis is approximately £1,640 per month. Buy-to-let or holiday-let products generally land 50–150 basis points higher; that is the figure to confirm with a broker against the specific use case.
Annual — council tax (with premium)
Cornwall Council voted to apply the maximum 100% second-home premium from 1 April 2025 (Cornwall Council: second homes). On a 2026–27 Band D charge of £2,590.93, that is £5,181.86 a year — twice what a main-residence owner on the same band pays. The premium does not apply to properties let out 70+ nights of qualifying short-let bookings per year (subject to council verification).
Annual — insurance and running
Specialist second-home insurance — unoccupied for >30 consecutive days, often with let-out cover — generally costs 30–80% more than a standard buildings + contents policy. Energy running costs depend on EPC rating; at the Ofgem energy price cap and an average 90 m² dwelling, expect £1,400–£2,200/year if used regularly.
Year-one total — £400,000 Cornwall second home (illustrative)
| Item | Amount |
|---|---|
| SDLT (standard + 5% surcharge) | £30,000 |
| Conveyancing + survey | £3,500 |
| Mortgage repayments (£300k @ 4.32%, 25y, capital+interest) | £19,680 |
| Council tax (Band D + 100% premium) | £5,182 |
| Specialist insurance (mid-range estimate) | £900 |
| Running costs (utilities, maintenance, garden) | £2,500 |
| Year-one total | £61,762 |
That assumes a £100,000 deposit, a 75% LTV mortgage, no FX charges, and no holiday-let income. Mortgage figure is interest plus capital repayment; the interest-only equivalent in year one is around £12,960. Run your own scenario through the postcode tool — Falmouth in this example — for property-by-property numbers.
Council tax premium — where it bites hardest
Not every council has chosen to apply the maximum 100% premium. The pattern is concentrated in coastal, rural and tourist authorities where the second-home share of housing stock is highest. Below are 2026–27 Band D averages for a sample of LAs that have publicly adopted the maximum premium, drawn from the Homecost council tax dataset.
| Local authority | Band D 2026–27 | With 100% second-home premium |
|---|---|---|
| Dorset | £2,765.02 | £5,530.04 |
| West Devon | £2,705.33 | £5,410.66 |
| Hastings | £2,676.58 | £5,353.16 |
| Mid Devon | £2,656.41 | £5,312.82 |
| North Devon | £2,642.21 | £5,284.42 |
| Isle of Wight | £2,625.79 | £5,251.58 |
| South Hams | £2,615.22 | £5,230.44 |
| East Devon | £2,595.46 | £5,190.92 |
| Cornwall | £2,590.93 | £5,181.86 |
| North Yorkshire | £2,544.34 | £5,088.68 |
| Westmorland and Furness | £2,507.99 | £5,015.98 |
| North Norfolk | £2,459.93 | £4,919.86 |
| Cotswold | £2,391.65 | £4,783.30 |
Source: gov.uk council tax levels 2026–27 (joined to Homecost LA dataset, 13 May 2026). Whether a specific property is subject to the premium depends on the billing authority's adopted scheme and any exemptions (probate, sale-pending, job-related accommodation, qualifying short-let property). Each council publishes its own scheme — always check the relevant local authority page before budgeting.
The combined effect: in Dorset, an owner of a Band D second home in 2026–27 will pay £5,530 in council tax compared with £2,765 for the same property occupied as a main residence — and £30,000 in SDLT on a £400k purchase compared with £7,500 for a main-residence buyer. That is a £27,765 first-year cost gap on the same physical property, before any difference in insurance or utilities.
Coastal pricing — what the data actually shows
For a £400k–£600k coastal Cornwall second-home shortlist, the 2025 average sale prices by postcode district paint a clear picture of the market segments. All figures from HM Land Registry pp-complete (fetched 13 May 2026):
| Postcode area | 2025 sales | Average sale price |
|---|---|---|
| Padstow (PL28) | 79 | £563,814 |
| Padstow / Rock (PL27) | 241 | £528,184 |
| St Agnes (TR5) | 76 | £481,046 |
| Perranporth (TR6) | 65 | £454,837 |
| Truro / Falmouth surround (TR3) | 187 | £452,813 |
| Falmouth (TR11) | 523 | £431,963 |
| Tintagel (PL34) | 32 | £427,301 |
| Roseland peninsula (TR2) | 725 | £417,621 |
| Truro outlying (TR4) | 164 | £383,857 |
| Newquay (TR7–8) | 735 | £365,669 |
| Truro central (TR1) | 2,357 | £320,521 |
| St Austell (PL26) | 372 | £312,855 |
Cornwall's house price index — measuring like-for-like price change rather than averages — was 92.7 in January 2026 against 94.7 in January 2025, a 2.1% fall over the year. England as a whole was up 1.1% over the same window (ONS UK HPI). North Norfolk fell 5.6% and South Hams 5.2% on the same comparison. Coastal areas where the cost of ownership has stepped up are also the areas where the underlying index has softened.
That divergence is the part most buyers miss: headline asking prices in coastal towns held up through 2024, but transaction-level prices have eased while the running cost of owning has gone in the opposite direction.
How the cost stack compares to a main-residence purchase
A side-by-side comparison at £400,000 in Cornwall, year one:
| Cost line | Main residence | Second home | Difference |
|---|---|---|---|
| SDLT | £7,500 | £30,000 | +£22,500 |
| Council tax (Band D) | £2,591 | £5,182 | +£2,591 |
| Mortgage (£300k @ 4.32%) | £19,680 | £19,680 (at best) | £0+ |
| Conveyancing + survey | £3,500 | £3,500 | £0 |
| Insurance | ~£500 | ~£900 | +£400 |
| Running costs | £2,500 | £2,500 | £0 |
| Year-one total | £36,271 | £61,762 | +£25,491 |
The gap is around £25,500 in year one alone, with roughly £22,500 of that being a one-off SDLT surcharge and the rest a recurring premium on council tax and insurance. Over a 10-year hold with the council tax premium intact, the recurring delta compounds to roughly £30,000 on top of the upfront surcharge — call it £52,000–£60,000 of pure ownership tax on a £400k Cornwall property over a decade, holding everything else equal.
Practical points before budgeting
- The 5% surcharge applies on the full purchase price, not just the slice above £40,000. A £400,000 purchase generates £20,000 of surcharge, not £18,000.
- Joint purchases catch the surcharge if any co-buyer owns another dwelling. That includes parental help where the parent already owns. The surcharge applies to the whole property.
- Second-home premium does not always apply. If the property meets the qualifying short-let test (typically 140 nights available, 70 nights let, both verified by the council), it may be classified as a self-catering business and fall under business rates instead. Each council publishes its own evidence requirements.
- HMRC publishes a refund route only for the "sold previous main residence within 36 months" scenario — there is no general refund mechanism for buyers who later change use.
This is general information based on published HMRC, gov.uk and Bank of England data. It is not tax, legal or financial advice. Speak to a qualified adviser — conveyancer, tax specialist and mortgage broker — before acting on any specific purchase.
See also
- Additional property Stamp Duty surcharge in the UK: how the 5% works
- True cost of buying a £400,000 home in the UK
- Stamp Duty for non-UK residents: the 2% surcharge explained
- Browse more cost intelligence guides
Try the Homecost postcode tool for a Falmouth-area worked example, or plug in any other postcode to see comparable sales, council tax band-D and running-cost detail in seconds.
Based on 30.9M HM Land Registry transactions and 2026–27 council tax data across 296 English billing authorities. Methodology and source detail: browse the Homecost blog.