Cities · London

Buy-to-Let mortgage brokers in London

12 independent, FCA-authorised advisers covering London and the wider Greater London area who handle buy-to-let mortgage cases. Contact them directly — we never sell your details.

Buy-to-Let mortgages in London: what to know

Buy-to-let mortgages are assessed mainly on the rent the property will achieve, not on your salary. Lenders apply an interest coverage ratio — commonly requiring rent to cover 125% to 145% of the mortgage interest at a stressed rate. Deposits are larger than for residential, usually 25% and often more. In London, whether a purchase works usually comes down to local rental yield against the stress test rather than what you personally earn.

  • Most lenders want rent to cover 125–145% of the interest at a stressed rate, so a property can fail the test even when it is comfortably cash-flow positive in reality.
  • Limited-company buy-to-let is now common because mortgage interest is not fully deductible for higher-rate individual landlords. The mortgage rates are usually higher but the tax treatment can outweigh that.
  • Buy-to-let attracts the additional-property stamp duty surcharge on top of standard rates — factor it into your deposit planning from the outset.
  • Portfolio landlords (generally four or more mortgaged properties) face extra underwriting on the whole portfolio, so a broker who regularly places London portfolio cases saves considerable time.

What matters locally in London

The capital is really dozens of separate markets. Zone 1 and the prime central boroughs are dominated by flats and cash-heavy buyers; the inner ring — Hackney, Peckham, Walthamstow, Brixton — mixes Victorian terraces with converted flats and heavy first-time-buyer demand; the outer boroughs from Croydon and Bromley to Barnet and Bexley are where family houses and school catchments drive moves. Ex-local-authority flats are everywhere and are perfectly mortgageable, but a minority of lenders restrict them by block height, balcony access or the percentage of privately owned flats in the block. New-build towers along the river and in regeneration zones bring their own issues: service charges that affect affordability, and cladding and building-safety documentation that a lender will want to see before offering.

  • Complex and variable income. Bonuses, commission, share awards, LLP partnership drawings, contractor day rates and dual-currency pay are all common in London and are treated very differently from lender to lender — some count 100% of a bonus, others half, others only after two years of history.
  • Leasehold flats. Lease length, ground rent structure, service charges and building-safety paperwork can all restrict lender choice, and a short lease is a mortgage problem long before it becomes a legal one.

England

Buying here follows the England and Wales process: you pay Stamp Duty Land Tax on the purchase, with a surcharge on second homes and buy-to-let, and neither side is committed until contracts are exchanged. Most flats are leasehold, so the length of the lease, the ground rent and service charge, and any outstanding cladding or fire-safety paperwork all affect which lenders will accept the property as security. A broker will usually ask about the tenure before anything else when you are buying a flat.

Can a London broker help if I am buying an ex-local-authority flat?

Yes, and it is one of the more useful things a broker does here. Ex-council flats are mainstream security for most lenders, but a minority apply restrictions — on blocks above a certain number of storeys, on deck or balcony access, or where the majority of flats in the block are still council-owned. Knowing which lenders apply which restriction avoids a valuation being downvalued or the case being declined weeks in.

Questions worth asking a buy-to-let broker

How big a deposit do I need for a buy-to-let in London?
Usually at least 25%, and the best rates typically start at 40%. A handful of lenders will consider 20% but the pricing is rarely competitive. Remember the additional-property stamp duty surcharge sits on top of the deposit.
Should I buy through a limited company?
It depends on your tax position, and it is genuinely a question for an accountant rather than a mortgage broker alone. Higher-rate taxpayers building a portfolio often find a company structure more efficient; a single property held by a basic-rate taxpayer frequently is not.
Can I get a buy-to-let mortgage as a first-time buyer?
It is possible but the choice of lenders narrows sharply, and some will decline outright because you do not own a home yourself. Expect a larger deposit and closer scrutiny of your personal income.
Does my own income matter for a buy-to-let?
Often yes, at least as a threshold. Many lenders set a minimum personal income of around £25,000, and some assess affordability partly on your income where the rental cover is marginal.

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