You've built a solid Yorkshire portfolio on yields north of 8%, and now someone at a landlord meetup has pointed you toward the East of England: Cambridge's life-sciences boom, a deep commuter belt into London, and tenant demand that rarely dries up. It sounds like exactly the kind of stable, well-heeled market that could sit alongside your Northern properties. Run the actual numbers on a typical regional purchase, though, and the story changes fast.

A property bought today at the East of England's average price of £338,000 yields just 4.5% gross, and once a buy-to-let mortgage, running costs and Section 24 tax are applied, even a basic-rate taxpayer is left roughly £222 a month out of pocket, rising to £478 a month for a higher-rate taxpayer (HM Land Registry HPI, May 2026; ONS Price Index of Private Rents, May 2026). That's not a rounding error on a spreadsheet. It's real money leaving your account every month just to hold the property.

What £338,000 actually buys you in the East of England

The East of England is one of the more expensive English regions outside London and the South East, with an average house price of £338,000 as of May 2026, up from £331,000 a year earlier, a 2.3% increase (HM Land Registry HPI, May 2026, published July 2026). That's roughly 24.7% above the UK average of £271,000 recorded in the same release. First-time buyers in the region paid £229,000 on average, and home-movers £327,000 (Land Registry HPI, May 2026).

Within the region, the range is wide. Norfolk is the East of England's cheapest county, averaging under £300,000, while Essex sits near the top of the region's price table at around £406,000 (Plumplot regional house price analysis of Land Registry data, 2026). Cambridge, the region's best-known market thanks to its life-sciences and technology economy, averages closer to £475,000 for a typical investment-grade flat or terrace.

So if you're comparing East of England prices against topping up your existing Northern portfolio, you're already starting from a materially higher entry cost before you've checked what the property will actually rent for.

The cash flow maths: even basic-rate landlords lose money

Take a property at the region's average price of £338,000, bought with a 75% loan-to-value buy-to-let mortgage: an £84,500 deposit and a £253,500 loan. At the current average buy-to-let fixed rate of 5.42% (Moneyfacts, 1 July 2026), that's £1,145 a month in interest on an interest-only basis, the standard structure for most buy-to-let lending.

The region's average rent is £1,281 a month, up 3.3% over the year (ONS Price Index of Private Rents, May 2026), which gives the 4.5% gross yield used above. Strip out a 12% management fee (£154), a one-month annual void allowance (£107) and a modest insurance and maintenance reserve (£55), and the property is already £180 a month underwater before any tax is due.

Then Section 24 arrives. Because mortgage interest can no longer be deducted as a business expense, a landlord pays income tax on the full rental income and claims only a 20% credit, capped here at the property's profit before interest relief, since the mortgage interest is larger than that figure. For a basic-rate (20%) taxpayer, that's a further £42 a month, taking the total loss to £222 a month, or £2,664 a year. For a higher-rate (40%) taxpayer, the additional tax bill rises to £298 a month, pushing the total loss to £478 a month, or £5,736 a year.

So if you're weighing a purchase at anything close to the East of England's average price and yield, don't assume staying in the basic-rate band protects you. Every tax band loses money here.

Stamp duty adds another £23,800 before you've collected a penny in rent

The East of England sits entirely in England, so Stamp Duty Land Tax applies, not Scotland's Land and Buildings Transaction Tax or Wales's Land Transaction Tax. Additional residential properties, including every mortgaged buy-to-let purchase, carry a 5% surcharge on top of the standard bands, raised from 3% on 31 October 2024 at the Autumn Budget. On the regional average price of £338,000, that means 5% on the first £125,000, 7% on the next £125,000 and 10% on the remaining £88,000, a total bill of £23,800.

Set that against the monthly cash flow loss calculated above and the stamp duty bill alone is worth roughly nine years of the ongoing basic-rate shortfall, or four years of the higher-rate one, paid upfront before the first month's rent has landed. Run your own numbers through our stamp duty calculator and our Section 24 tax calculator before making an offer, because the surcharge alone can turn a marginal deal into an obviously bad one.

So before this property has paid you a single month's rent, you've already handed over a tax bill worth years of the eventual shortfall, which makes the purchase price only half the story.

Cambridge's marketed 5.8% doesn't survive contact with its own price tag

Cambridge is the name most agents reach for when marketing East of England buy-to-let stock, pointing to a fast-growing life-sciences and technology economy and near-permanent tenant demand from the university and its spin-out companies. Adverts for the city commonly quote yields around 5.8%. Run the actual numbers on a typical Cambridge investment property, bought at roughly £475,000 and renting for around £1,700 a month, and the real gross yield is 4.3%, not 5.8% (Morris & Armitage East Anglia buy-to-let guide, 2026).

Elsewhere in the region the picture is more mixed. Ipswich averages a 5.1% gross yield and Peterborough 5.3% (PropertyInvestmentsUK, 2026), both comfortably ahead of the regional average and worth a closer look if yield is the priority. Compare all of these with the North East, where the average yield across the whole region already sits at 9.2%, without needing to cherry-pick a single postcode (Fleet Mortgages Q2 2026 Rental Barometer). Our earlier look at marketed yield claims that don't hold up citywide found the same gap between what an agent quotes and what a city actually delivers.

So the message here isn't to write off the East of England entirely: Cambridge's reputation is doing a lot of the selling, and Ipswich or Peterborough's less glamorous averages actually clear the numbers by a wider margin than the city everyone asks about first.

The EPC bill still due by 2030

Much of the East of England's rental stock, particularly in Norfolk, Suffolk and the region's market towns, is older period housing that tends to sit at lower Energy Performance Certificate ratings than newer-build stock elsewhere. Every privately rented home in England and Wales will need to reach at least an EPC C rating by 1 October 2030, a single deadline covering existing tenancies as well as new ones, with a cost cap of £10,000 per property and fines of up to £30,000 per breach for non-compliance (Warm Homes Plan, GOV.UK, published 21 January 2026, subject to final legislation). Average compliance spend is running at roughly £6,900 per property based on current upgrade costs.

Add a £6,900 upgrade bill to a property that is already losing money at every tax band, and the payback period on an older East of England property stretches out well beyond what the 4.5% headline yield would suggest. This is exactly the kind of cost a thin regional yield doesn't leave much room to absorb.

So if you're assessing an older property in this region specifically, check its current EPC rating and the realistic upgrade cost before you factor it into your yield calculation, not after you've exchanged contracts.

The maths, in one place:

Purchase price: £338,000 (Land Registry HPI, May 2026)
Deposit (25%) / mortgage (75% LTV): £84,500 / £253,500
Buy-to-let mortgage rate: 5.42% (Moneyfacts, 1 July 2026), interest-only
Monthly mortgage interest: £1,145
Gross yield: 4.5% · monthly rent: £1,281
Management fee (12%), void allowance and reserve: £316/month combined
Cash flow before tax: −£180/month
Basic-rate (20%) Section 24 tax: £42/month → cash flow −£222/month
Higher-rate (40%) Section 24 tax: £298/month → cash flow −£478/month
Stamp Duty (additional property, +5% surcharge): £23,800

What this means for you

If you're weighing East of England capital against topping up your existing portfolio, the maths points toward one of two moves. Either concentrate any new regional capital specifically in Ipswich or Peterborough, where the average yield already clears 5%, and verify the actual achievable rent against comparable local lets before committing, or redeploy that capital into a region where the average yield clears 8% or more without hunting for a specific town, such as the North East at 9.2%. Buying at the East of England's regional average price on the strength of Cambridge's reputation is, frankly, the one option the numbers rule out at any tax rate. If you're already holding a property here and haven't checked its yield against these figures recently, that's worth doing before your next remortgage rather than after: a fixed-rate renewal is the natural moment to stress test whether the property still earns its place in the portfolio at today's rates and today's tax rules. For the wider incorporation question this raises for larger portfolios, our piece on incorporating into a limited company and our earlier South West spotlight, which found a similar basic-rate loss at an even lower yield, both walk through comparable trade-offs in more detail.