Rented normally, it costs you £1,127 a month. That is £13,518 a year, every year you hold it.

Will it pay?Calculator

You top up £1,127 a month — the mortgage takes 93p of every pound of rent

Borrowing £207,973 less would close that shortfall — which is £207,973 more cash at the start, on top of the deposit.

£5,688 mortgage

£6,111 rent in£1,127 short

£175 of that is a guess — no service charge published.

□ service charge not published2 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

£529,975 + refurb costs

And about £67,591 more over five years, because it loses £1,127 every month you hold it — before any repair. That already assumes the rent never falls.

£529,975 to buy it

deposit · stamp duty · solicitor · fees~£2,100, unseen

□ works not inspected

What would have to be true?The working

£275,000 off and it stops losing money

At the asking price you feed it £1,127 a month. At £1,122,598 the rent covers everything — leaving stamp duty of £112,140 at that price.

offer £1,122,598

asked £1,400,000

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

What will the rent borrow?Lender test

The rent carries £648,382 of the £1,050,000 loan

That £401,618 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 £297,877. Lenders test the rent at 7.5% and need it to cover 145% of the payment.

£9,516 needed

more than the £5,876 rent

stressed at 7.5%, 145% cover

◧ rent after empty weeks £5,876PRA-style test

How big is it, really?The plan

One figure, and nothing checking it 1,513 sq ft

Only the agent’s figure exists for this house. Open for what that means.

□ area unchecked — agent’s own

Is it a good location?Open the map

London, SW1P 1RR

Flood risk checking… — open for the map, the schools and the rest.

Article 4Not assessed for this address

■ postcode area, not this address

What to know before you offerThe checks

Every tenancy here is periodic, with no Section 21 to end it

Tenancies are now periodic, with no Section 21 — budget a longer void.

1 problem found · 1 came back clear · 7 we could not check

■ from the Renters’ Rights Act 2025listing last seen 15 Sep 2026

Which strategy wins?The ways to run it

Every way loses money — Standard rental loses least, at £1,127 a month

Standard rental also ties up the least cash, £532,075.

Standard rental−£1,127 · £532,075 in

Housing-benefit rent−£2,647 · £532,075 in

Rent by the room−£5,450 · £532,075 in

Each row: money kept a month, then the cash it ties up. Not compared: Do it up, then remortgage (pays back at the remortgage) · Short-stay let (no local short-let data) · Guaranteed council rent (no scheme in this borough) · Buy, improve & sell (pays out on sale)

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

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

−£146,755 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 23% in the price would leave nothing from a sale after selling costs, and you would still owe the lender any shortfall. That is the £532,075 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