London 4-bed at £733,200 and £5,132 rent: does the net yield hold up?

I’m assessing a London 4-bed villa priced at £733,200, with expected rent of £5,132 per month. That is £61,584 annually and a headline gross yield of about 8.4%.

I’m assigning nothing to appreciation in the base case. My model includes vacancy, management, routine maintenance and a separate reserve for one larger repair. The building looks sound, but building reserves or shared costs could materially change the result.

Which local cost am I most likely to be underestimating—insurance, property tax during voids, turnover, or something else? What net yield would compensate you for the risk?

The building-related costs are where I would press hardest. Confirm exactly what you own, whether there are shared areas or charges, what the reserve covers, and whether major works could require additional contributions. Get an actual insurance figure too; a generic percentage can hide a large miss. I would not choose a target net yield until those costs are in pounds rather than assumptions.

Is £5,132 an achieved rent supported by comparable tenancies, or the listing agent’s expectation? Also, is that for one household taking the whole villa? Those answers affect management, turnover and vacancy assumptions. I’d also want to know the tenure and whether your return calculation includes purchase and financing costs, rather than only the £733,200 price.

The awkward constraint is that turnover costs tend to arrive together rather than neatly across the year. With a 4-bed property, a tenant change may bring a void plus cleaning, decorating and several minor repairs, even if the underlying building is sound.

I would therefore give turnover its own line rather than assuming the vacancy allowance captures all of it. The important part is to check that decorating or repairs between tenancies have not also been included under routine maintenance or the major-work reserve. Double-counting can make the deal look unnecessarily weak, but leaving turnover bundled into vacancy can make the £5,132 monthly rent look more dependable than it is.

Financing sensitivity may matter more than arguing over a fraction of the vacancy allowance. Model the property unlevered first, then add the actual loan costs and stress them separately. I would also keep acquisition taxes and buying expenses outside the operating net yield but include them when calculating return on total cash invested. Otherwise an attractive 8.4% headline can be compared with the wrong denominator.

A useful next step is a monthly cash-flow waterfall starting with £5,132: vacancy allowance, management, insurance, owner-paid property tax or charges during empty periods, routine maintenance, turnover, shared-building costs and the larger reserve. Annualise what remains and divide by £733,200. Then run a second case with lower rent, a longer void and a major repair in the same year.

One addition: reverse the calculation. Pick the minimum annual cash amount you need this property to produce, then work out the maximum combined costs it can tolerate. Compare that allowance with written quotes and the building’s actual records. If the deal only works when every uncertain item lands near the optimistic end, the 8.4% gross yield is not providing much protection.