Rented normally, it costs you £339 a month. That is £4,067 a year, every year you hold it.

Will it pay?Calculator

You top up £339 a month — the mortgage takes 77p of every pound of rent

Borrowing £62,571 less would close that shortfall — which is £62,571 more cash at the start, on top of the deposit.

£1,168 mortgage

£631 running

£1,518 rent in£339 short

◧ market rent £1,518 · 43 comps2 empty weeks a year assumed

What if I change my assumptions?The dials

At the asking price, 25% deposit, 6.50% charged

Change any of these 16 and every card on this page changes with it. The 6.50% is the 5.75% quoted plus a company premium.

◧ worked out from local rents

What will it cost me to buy?Breakdown

£98,463 + refurb costs

And about £20,336 more over five years, because it loses £339 every month you hold it — before any repair. That already assumes the rent never falls.

£98,463 to buy it

deposit · stamp duty · solicitor · fees~£9,982, unseen

□ works not inspected

What would have to be true?The working

£80,000 off and it stops losing money

At the asking price you feed it £339 a month. At £204,058 the rent covers everything — leaving stamp duty of £11,784 at that price.

offer £204,058

asked £287,500

◧ worked back from the rent■ stamp duty re-bandedrounded down to £5,000 — the rent it works back from is an estimate

Is the price right?The deeds

Last sold for £310,000 in 2021

Nothing nearby is comparable, but asking is 7% less than the £310,000 paid for it in 2021.

□ this address’s own deeds, no comparable saleHM Land Registry Price Paid Data

Can we trust the rent?Rent evidence

Nearby lettings back this rent

We hold too few nearby asking rents to cross-check this figure, so nothing here confirms it a second way.

+33 more

our bar: 10 within 500 m

our own middle half£1,458–£1,580/mo

■ 43 lettings within 500 m□ no nearby asks to cross-checkAdvertised rents, not signed tenancies

What will the rent borrow?Lender test

The rent carries £161,061 of the £215,625 loan

That £54,564 is yours to find on top of the deposit. Tested at 125% instead of 145% — a company or a basic-rate taxpayer usually is — the gap is £28,794. Lenders test the rent at 7.5% and need it to cover 145% of the payment.

£1,954 needed

more than the £1,460 rent

stressed at 7.5%, 145% cover

◧ rent after empty weeks £1,460PRA-style test

How big is it, really?The plan

One figure, and nothing checking it 409 sq ft

The advert and the survey disagree — open for both figures and the gap.

■ area measured on site

Is it a good location?Open the map

Harrow, HA1 3BU

2 of 5 schools in this postcode area rated Good or Outstanding and flood risk checking… — open for the map, the schools and the rest.

Article 4Not assessed for this address

■ postcode area, not this address

What could kill thisThe checks

You would need a licence from the council first

Letting without the council’s licence is an offence, and the fee is in no figure here.

2 problems found · 3 came back clear · 2 we could not check · 2 do not apply to this property

■ from council licensing registerlisting last seen 14 Sep 2026

Which strategy wins?The ways to run it

Every way loses money — Standard rental loses least, at £339 a month

Let it to the council: £3,444 a year less, but they keep paying when it is empty.

Standard rental−£339 · £108,445 in

Guaranteed council rent−£626 · £108,445 in

Housing-benefit rent−£749 · £108,445 in

Short-stay let−£1,249 · £108,445 in

59 nearby short-lets within 11.1 km · medium confidence

Each row: money kept a month, then the cash it ties up. Not compared: Rent by the room (only 1 bedroom) · Do it up, then remortgage (pays back at the remortgage) · Buy, improve & sell (pays out on sale)

◧ 4 ways, one measureranked on money kept each month, at the asking price

What would you walk away with?The five-year sums

−£29,627 after five years on the cash you put in, before tax on the sale

Less than the same cash would have made in a savings account, after tax on the interest. The savings account’s capital is not at risk; the property’s is. A fall of about 25% in the price would leave nothing from a sale after selling costs, and you would still owe the lender any shortfall. That is the £108,445 you put in. The 5-year fix runs past this 5-year hold, so the rate reset comes after it.

◧ 2.0%/yr growth assumed