---
title: "Prime Postcode Mortgages | High-Value Home Lending"
description: "Prime postcode mortgages: large loans on high-value homes in prime London and beyond: valuation, interest-only, private banks, overseas buyers, stamp duty."
url: "https://mortgagelane.com/mortgages/prime-postcode-mortgages"
site: "Mortgage Lane"
collection: "mortgages"
date: "2026-10-12"
author: "Joseph Lane"
category: "Mortgages"
reviewed: "2026-10-12"
reading_time: "8 min"
byline: "Joseph Lane"
author_credentials: "CeMAP · FCA authorised firm"
language: "en-GB"
robots: "index,follow"
---

# Prime Postcode Mortgages | High-Value Home Lending

Prime postcode mortgages: large loans on high-value homes in prime London and beyond: valuation, interest-only, private banks, overseas buyers, stamp duty.

## Prime Postcode Mortgages

Prime postcode mortgages: large loans on high-value homes in prime London and beyond: valuation, interest-only, private banks, overseas buyers, stamp duty.

[Prime postcode mortgage](https://mortgagelane.com/definitions?term=prime-postcode-mortgage)

Specialist lending

A mortgage on a high-value home in a sought-after location, often assessed by a specialist lending team.

[Read the full definition of Prime postcode mortgage](https://mortgagelane.com/definitions?term=prime-postcode-mortgage)

## Talk to an adviser about prime postcode mortgages

Speak to a Mortgage Lane adviser about your options.

## At a glance

A [prime postcode mortgage](https://mortgagelane.com/definitions#def-prime-postcode-mortgage) is a large [mortgage](https://mortgagelane.com/definitions#def-mortgage) on a high-value home in a sought-after location — central and prime London, and prime areas across the country — where loans often run into millions and lenders underwrite each case individually. Large loans are typically offered at lower loan-to-values than standard mortgages, interest-only is common for wealthy borrowers with assets, and private banks compete with specialist and high-street lenders. Valuation is harder because [comparable sales](https://mortgagelane.com/definitions#def-comparable-evidence) are few, overseas buyers face extra [Stamp Duty](https://mortgagelane.com/definitions#def-stamp-duty-land-tax), and at the top of the market Stamp Duty itself becomes one of the largest costs of the purchase.

## How Mortgage Lane can help

Mortgage Lane arranges high-value mortgages for UK and overseas buyers, high earners and wealthy families — purchases, [remortgages](https://mortgagelane.com/definitions#def-remortgage) and capital raising on prime homes.

## What is a prime postcode mortgage?

A prime postcode mortgage is a [residential mortgage](https://mortgagelane.com/definitions#def-residential-mortgage) on a high-value home in a prime location, typically a large loan [underwritten](https://mortgagelane.com/definitions#def-underwriting) individually by private banks, specialist lenders or the high-value teams of mainstream lenders. It is regulated by the FCA under [MCOB](https://www.handbook.fca.org.uk/handbook/MCOB/), with modified rules available for [high net worth mortgage](https://mortgagelane.com/definitions#def-high-net-worth-mortgage) customers.

## Rates

**How the pricing is built:** large loans are priced individually; private banks may price against assets placed with them. Loan-to-value bands narrow as loan size rises.

## Criteria

*Criteria*

| Criterion | Value |
| --- | --- |
| Loan size | Individually underwritten above lender thresholds |
| Loan-to-value | Typically lower on larger loans |
| Interest-only | Common, with assets or sale as strategy |
| Income | Complex, bonus, carried interest, overseas — assessed by specialists |
| High net worth | Annual net income ≥ £300,000 or net assets ≥ £3m |
| Valuation | Specialist valuers; thin comparables |
| Overseas buyers | Accepted by some lenders; 2% SDLT surcharge for non-residents |

*Criteria vary by lender and must be checked for your application.*

## Who lends

- **Private banks** — relationship lending against wider wealth.
- **Specialist lenders** — individual underwriting for complex income.
- **High-street high-value teams** — competitive for straightforward large loans.

## Overseas buyers

Non-UK resident purchasers pay a 2% Stamp Duty surcharge on residential property in England and Northern Ireland, on top of other rates. Lenders accepting overseas buyers look at income currency, residence and assets. See [expat mortgages](https://mortgagelane.com/specialists/expat-mortgages).

## Stamp Duty at the top

Above £1.5 million, residential Stamp Duty is charged at 12% on the slice above that figure; buyers of additional homes add 5% of the whole price, and non-residents add 2%.

## How it works

01

### Step 1

Property, loan, income and assets reviewed.

02

### Step 2

Lenders and private banks approached.

03

### Step 3

Indicative terms compared on the full package.

04

### Step 4

Specialist valuation and underwriting.

05

### Step 5

Completion and Stamp Duty paid.

## Stamp Duty on a £3 million home: the arithmetic

**An illustrative £3,000,000 home in England.**

### Illustrative figures

*Stamp Duty on a £3 million home: the arithmetic*

| Buyer | Stamp Duty |
| --- | --- |
| UK resident, main home | £273,750 |
| UK resident, additional home | £423,750 |
| Non-UK resident, additional home | £483,750 |

*Calculated for England or Northern Ireland on the residential SDLT bands applying at the review date with the 5% higher-rates and 2% non-resident surcharges. Not tax advice.*

A non-resident buying a second home pays £210,000 more Stamp Duty than a resident buying a main home — cash that must sit alongside the deposit, since it is not usually borrowed.

### What decides the case

Budget for Stamp Duty and the lower loan-to-values on large loans, and compare private banks with specialist and high-street lenders on the full package.

**Related reading:**  [mortgages for celebrities](https://mortgagelane.com/mortgages/mortgages-for-celebrities); [country house mortgages](https://mortgagelane.com/mortgages/country-house-mortgages).

## Sources and further guidance

- [Residential SDLT rates](https://www.gov.uk/stamp-duty-land-tax/residential-property-rates)
- [FCA high net worth mortgage customer definition](https://handbook.fca.org.uk/glossary/G2953)

## Related mortgages and guides

## Mortgage calculator

Illustrative estimates only. Use the lender’s proposed figures; this calculator does not assess eligibility or guarantee an offer.

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Indicative estimate only, subject to lender criteria and valuation. This is not a mortgage offer. Your property may be repossessed if you do not keep up repayments.

## Prime Postcode Mortgages FAQs

**Q: What is a prime postcode mortgage?**

faq-id: mortgages-prime-postcode-mortgages-what-is-a-prime-postcode-mortgage

A prime postcode mortgage is a large mortgage on a high-value home in a sought-after location, such as prime London, typically underwritten individually by private banks, specialist lenders or mainstream lenders' high-value teams.

**Q: How large a mortgage can I get on a prime property?**

faq-id: mortgages-prime-postcode-mortgages-how-large-a-mortgage-can-i-get-on-a-prime-property

Large mortgages running into millions are available, assessed individually on income, assets and the property. The maximum depends on the lender's view of [affordability](https://mortgagelane.com/definitions#def-affordability) or of the assets supporting the loan.

**Q: What loan-to-value is available on large mortgages?**

faq-id: mortgages-prime-postcode-mortgages-what-loan-to-value-is-available-on-large-mortgages

Lenders usually offer lower maximum loan-to-values as loan size increases, so large prime mortgages often need larger deposits than standard mortgages. Thresholds vary by lender and are assessed case by case.

**Q: Are prime mortgages usually interest-only?**

faq-id: mortgages-prime-postcode-mortgages-are-prime-mortgages-usually-interest-only

Interest-only is common on prime mortgages for borrowers with substantial assets, with repayment planned from investments, other property or sale, though repayment and part and part are also available. The strategy is evidenced at application.

**Q: How is bonus and complex income assessed?**

faq-id: mortgages-prime-postcode-mortgages-how-is-bonus-and-complex-income-assessed

Specialist and private lenders assess bonuses, carried interest, partnership profits and other complex income individually, often averaging over several years and considering future entitlements and assets. Employer or accountant letters support the figures.

**Q: Do lenders treat high-value property differently?**

faq-id: mortgages-prime-postcode-mortgages-do-lenders-treat-high-value-property-differently

Lenders apply individual underwriting, specialist valuation and lower loan-to-values to high-value property, and some set maximum exposure per borrower or per property, because the market for such homes is smaller.

**Q: What is a private bank mortgage?**

faq-id: mortgages-prime-postcode-mortgages-what-is-a-private-bank-mortgage

A [private bank mortgage](https://mortgagelane.com/definitions#def-private-bank-mortgage) is relationship lending for wealthy clients, assessing wider wealth and often linked to assets held with the bank, offering flexibility on structure and income that standard lenders may not.

**Q: What is a high net worth mortgage customer?**

faq-id: mortgages-prime-postcode-mortgages-what-is-a-high-net-worth-mortgage-customer

A high net worth mortgage customer has annual net income of at least £300,000 or net assets of at least £3 million, with the evidence required by the lender under the FCA rules. Lenders can apply modified rules to them under the [Financial Conduct Authority](https://mortgagelane.com/definitions#def-financial-conduct-authority)'s (FCA) framework.

**Q: Should I use a private bank or a specialist lender?**

faq-id: mortgages-prime-postcode-mortgages-should-i-use-a-private-bank-or-a-specialist-lender

Private banks suit clients wanting a wider relationship and willing to place assets; specialist lenders suit complex income without that requirement; high-street teams can be competitive for straightforward cases. Comparing all shows the best package.

**Q: Do private banks require assets under management?**

faq-id: mortgages-prime-postcode-mortgages-do-private-banks-require-assets-under-management

Many private banks expect a level of assets under management as part of the lending relationship, though some lend without it. The requirement affects the overall cost and is compared across lenders.

**Q: Can overseas buyers get prime mortgages?**

faq-id: mortgages-prime-postcode-mortgages-can-overseas-buyers-get-prime-mortgages

Overseas buyers can get prime mortgages from lenders that accept non-UK residents, assessed on income currency, residence, assets and the property. Private banks are often more flexible for international clients.

**Q: Do non-residents pay extra Stamp Duty?**

faq-id: mortgages-prime-postcode-mortgages-do-non-residents-pay-extra-stamp-duty

Non-UK resident buyers of residential property in England and Northern Ireland pay a 2% Stamp Duty Land Tax (SDLT) surcharge on top of other rates, including the 5% surcharge on additional dwellings where it applies.

**Q: Can I get a mortgage on foreign currency income?**

faq-id: mortgages-prime-postcode-mortgages-can-i-get-a-mortgage-on-foreign-currency-income

Some lenders accept income in foreign currencies, applying a reduction for exchange-rate risk, and some lend in other currencies. The currency mismatch between income and loan is considered in affordability.

**Q: Do overseas buyers need a UK bank account?**

faq-id: mortgages-prime-postcode-mortgages-do-overseas-buyers-need-a-uk-bank-account

Many lenders require a UK bank account for mortgage payments, and all apply identity and anti-money-laundering checks on the source of deposits and wealth, which take longer for international clients.

**Q: How much is Stamp Duty on a £3 million home?**

faq-id: mortgages-prime-postcode-mortgages-how-much-is-stamp-duty-on-a-3-million-home

Stamp Duty Land Tax (SDLT) on a £3 million main home in England is £273,750. For an additional home it is £423,750, and for a non-UK resident buying an additional home £483,750.

**Q: Why are prime homes hard to value?**

faq-id: mortgages-prime-postcode-mortgages-why-are-prime-homes-hard-to-value

Prime homes are often unique, with few recent comparable sales, so valuers rely on fewer data points and greater judgement. Lenders use specialist valuers, and valuations can differ from the agreed price.

**Q: Can I raise capital against a prime home?**

faq-id: mortgages-prime-postcode-mortgages-can-i-raise-capital-against-a-prime-home

You can remortgage or take a [further advance](https://mortgagelane.com/definitions#def-further-advance) on a prime home to raise capital for purchases, investments or family, assessed on income or assets, often on interest-only with private banks or specialist lenders.

**Q: Can I buy a prime home through a company?**

faq-id: mortgages-prime-postcode-mortgages-can-i-buy-a-prime-home-through-a-company

Companies buying residential property over £500,000 can face a 17% Stamp Duty Land Tax (SDLT) rate in England and Northern Ireland and the Annual Tax on Enveloped Dwellings (ATED) unless reliefs, such as for property rental businesses, apply. Advice is essential.

**Q: How long does a prime mortgage take?**

faq-id: mortgages-prime-postcode-mortgages-how-long-does-a-prime-mortgage-take

Prime mortgages take longer than standard mortgages because of individual underwriting, specialist valuation and enhanced anti-money-laundering checks, often several weeks. Starting early protects the purchase timetable. Overseas clients should allow longer for checks on the source of funds.

**Q: Can I get a buy to let mortgage on a prime property?**

faq-id: mortgages-prime-postcode-mortgages-can-i-get-a-buy-to-let-mortgage-on-a-prime-property

[Buy to let](https://mortgagelane.com/definitions#def-buy-to-let-mortgage) mortgages are available on prime properties, assessed on rent under the [Prudential Regulation Authority](https://mortgagelane.com/definitions#def-prudential-regulation-authority)'s (PRA) [stress tests](https://mortgagelane.com/definitions#def-rental-stress-test), though prime rental yields are often low, making the rental test harder to meet.

## Buying or refinancing a high-value home?

Get in touch with the property, loan, income and assets, and we will approach the private banks and lenders suited to your case.

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Published: 2026-10-12

Last reviewed: 2026-10-12

Source: https://mortgagelane.com/mortgages/prime-postcode-mortgages