3-bed flat for sale in London W1U — £7850K | Dwelfy

Deals · W1U · Marylebone Square, 1 Aybrook Street, London, W1U

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No rent on file — nothing here can be priced yet

There is no rent on file for this address, so nothing here can be priced from one.

Put a rent you believe into the calculator and every figure on this page moves with it. Two or three local lettings will get you closer than anything we can offer here.

Marylebone Square, 1 Aybrook Street, London, W1U

3 BED FLATListed 73d · ~2.5mo

£7,850,000

No rent data for this listing — run your own numbers in the calculator below.

Why it works

Nothing here counts in its favour
No figure on this listing stands out in the property’s favour. That is a finding, not a gap — the cautions opposite are what this deal turns on.

Why to be cautious

No EPC band on record — the rating decides whether you may legally rent it out
An F or G rating has made a property unlettable on new tenancies since April 2020, and every rent figure on this page assumes it can be let.Free to check on the government EPC register in under a minute — do it before you offer, not after.
Monthly profit −£32,291/mo — you would top this up heavily, every month, from your own income
You would be topping it up every month, from your own income, for as long as you hold it.That can still be the plan if you are buying for capital growth — but it should be a decision, not a surprise. Try your own numbers →
-18.2% a year over five years — you tie up a lot of cash for what it returns
The capital you tie up is large relative to what the deal returns over five years.A lower offer or a smaller deposit changes this more than a higher rent does. Try a lower offer →
No rent comparables — estimate is a rule-of-thumb fallback, not market data. Verify the rent locally before offering.

What would have to be true?
No recorded basis for the rent to work from
Every price on this card is that rent inverted, and this row records no basis for its rent — not that the rent is wrong, but that we cannot show it was measured against nearby lettings. A price quoted to the £5,000 needs evidence we can point at.
rent basis not recorded

Is it a good location?
No school rated Good or better in this postcode area
5 schools in this postcode area, none rated Good or better and flood risk checking… — open for the map, the schools and the rest.
Article 4Not assessed for this address
postcode area, not this address

Which strategy wins?
No rent on file, so nothing can be ranked
No rent is recorded for this address, so nothing here can be priced from one. Put a rent you believe into the calculator and every figure below moves with it.
no market renta comparison needs a rent for every way of letting it

Ready to move on this deal?

Generates an offer pack with your numbers & sources — take it to the agent.

Listing seen …

What if…

Standard rental on an Assured Shorthold Tenancy. Single household, market rent, paid monthly direct to landlord (or via agent).

You keep-£32,291/mo

All-in cash£3,348,836

PaybackNever

Offer

Deposit

Mortgage rate

The dial above is the rate you would be quoted. Every figure on this page is worked at 6.50% — that rate plus a 0.75pp premium lenders add on a limited-company purchase.

Standard rental

Rent

Empty weeks a year

Doing it up

Estimated, not surveyed — nobody has been inside.

More assumptions10

Mortgage term

Fixed for

Stress rate

Solicitor + survey

Lender fees

Letting agent

Insurance

Maintenance

Service charge

Ground rent

Where these figures came from16

Offer the asking price£7,850,000Asking price from listing

Deposit a typical assumption25%Standard 75% LTV for BTL

Mortgage rate a typical assumption5.75%5-year fixed at 75% LTV — 5.75% (as of 2026-09-14). 5.75% headline + 0.75pp limited-company product premium = 6.50% charged in this model.

Rent no rent on file£0/moNo rent data — verify locally

Empty weeks a year a typical assumption2 wksTypical voids for BTL

Doing it up a typical figure, not a quote£15,111Per-property refurb estimate from the element rate-card model (£11,333–£21,155 range), VAT-inclusive

Mortgage term a general default, not this property25 yrs

Fixed for a typical assumption5 yrsFixed for 5 years (5-year fixed at 75% LTV); after the fix the projection charges the reversion rate — a stated assumption, not a forecast.

Stress rate a typical assumption7.50%The higher of 5.5% and your rate + 2 points (PRA SS13/16): 7.5%

Solicitor + survey a typical figure, not a quote£4,225Leasehold flat — £3,125 legal + £1,100 survey

Lender fees a typical figure, not a quote£118,7502% product fee on £5,887,500 loan + £1,000 booking fee

Letting agent a typical assumption10%Typical BTL agency rate

Insurance a typical figure, not a quote£40/moTypical BTL building+landlord cover for £400K+

Maintenance a typical figure, not a quote£67/moSemi/flat: £67/mo proxy

Service charge a typical figure, not a quote£150/moLeasehold fallback: £1,800/yr proxy — confirm with managing agent

Ground rent a typical figure, not a quote£25/moLeasehold fallback: £300/yr proxy — confirm in lease

These are this page’s own derivation notes, unedited. A figure marked a typical figure, not a quote is our model of a cost for a property of this kind in this area — not a price anybody has given you, and the first thing worth replacing with a real one.

Notes

Auto-saves

Listed by

Savills - London, Margaret Street, New Homes

020 8022 6246 View on portal

Asking price£7,850,000

There is no rent on file for this address, so nothing here can be priced from one.

What will it cost me to buy?Breakdown£3,333,725 + refurb costs£1,371,225 of that never comes back — stamp duty, solicitor and lender fees.£3,333,725 to buy itdeposit · stamp duty · solicitor · fees~£15,111, unseen□ works not inspected

Is it a good location?Open the mapNo school rated Good or better in this postcode area5 schools in this postcode area, none rated Good or better 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 to know before you offerThe checksEvery tenancy here is periodic, with no Section 21 to end itTenancies 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?No rent on file, so nothing can be rankedNo rent is recorded for this address, so nothing here can be priced from one. Put a rent you believe into the calculator and every figure below moves with it.□ no market renta comparison needs a rent for every way of letting it

Is it a good location?
No school rated Good or better in this postcode area
5 schools in this postcode area, none rated Good or better and flood risk checking… — open for the map, the schools and the rest.
Article 4Not assessed for this address
postcode area, not this address

Which strategy wins?
No rent on file, so nothing can be ranked
No rent is recorded for this address, so nothing here can be priced from one. Put a rent you believe into the calculator and every figure below moves with it.
no market renta comparison needs a rent for every way of letting it