Quick answer
A UK mortgage application typically runs through six stages: checking your affordability, credit report and deposit; gathering your documents; getting a Decision in Principle; finding a property and having an offer accepted; the full application with underwriting and valuation; and finally moving from formal offer through to completion.
Timelines vary a lot by lender and by how complex your circumstances are, but as a general guide the full application stage is commonly quoted as taking around two to six weeks from submission to formal offer, and a mortgage offer is typically valid for around six months once issued.
In this guide
1. Check your position first
Before approaching a lender, it is worth understanding three things about your own position: roughly what you can afford to borrow, what your credit report currently shows, and how your deposit size affects the range of mortgages open to you. Sorting these out first tends to save time later, since they are exactly what a lender will assess anyway.
- Affordability. Lenders calculate how much they will lend using your income, outgoings and a stress-tested rate rather than a simple income multiple alone. Our guide on how mortgage affordability is calculated explains how this works.
- Credit report. Checking your credit report before applying for a mortgage gives you a chance to fix errors or understand how existing adverse items might be viewed, before a lender sees it.
- Deposit. The size of your deposit affects your loan-to-value (LTV) and, in turn, which lenders and rates are available to you. Our guide on how deposit size affects your mortgage borrowing covers this in more detail.
2. Get your documents together
Lenders typically ask for proof of identity, proof of address, evidence of income (payslips or, for the self-employed, accounts or tax documents), recent bank statements, and evidence of where your deposit is coming from. Having these ready in advance is one of the simplest ways to keep an application moving, since delays in supplying documents are a common cause of a slower-than-expected process. Our full guide on mortgage application documents lists exactly what is commonly requested and why.
3. Get a Decision in Principle
A Decision in Principle(DIP), sometimes called an Agreement in Principle, is a lender's indication of roughly how much they would be willing to lend you, based on a summary of your income and outgoings and, commonly, a soft credit search that does not affect your credit score or show up to other lenders. It is not a guarantee of a mortgage offer — the full application is assessed in far more detail — but it is a useful early signal, and many estate agents expect to see one before treating an offer on a property as serious.
Our step-by-step guide on getting a Decision in Principle covers how to get one and what it does and does not confirm.
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Check Your Affordability4. Find the property and make an offer
With a Decision in Principle in hand, the next stage is finding a property and making an offer. Having your DIP ready, along with proof of deposit, can strengthen an offer in the eyes of a seller or estate agent, since it signals you are in a genuine position to proceed. Our guide on making an offer on a property covers how offers typically work and what to have ready.
5. The full application
Once your offer is accepted, you move to the full mortgage application with your chosen lender. This typically involves a hard credit search, which is recorded on your credit file, and a much more detailed assessment than the DIP stage. Underwriters commonly check your income against the documents you provide, your outgoings and existing commitments, your credit history in detail, and the deposit source. The lender also arranges a valuation of the property, to confirm it is worth what you are paying and that it meets their lending criteria.
Timelines vary considerably, but the full application stage is commonly quoted as taking somewhere around two to six weeks from submission to a formal mortgage offer, depending on the lender, how quickly documents and valuation are completed, and whether underwriting raises any queries. Our detailed guide on the full mortgage application walks through what underwriters look at and how to keep things moving.
6. Offer to completion
Once the lender issues a formal mortgage offer, the remaining steps are largely handled by your solicitor or conveyancer rather than the lender: searches, contract review, agreeing a completion date, exchange of contracts, and finally completion, when the mortgage funds are released and the property becomes yours. This stage is generally driven by the wider property chain rather than by the mortgage itself, so it can take longer than the application stage did.
A mortgage offer is typically valid for around six months from the date it is issued, though this varies by lender, so it is worth checking the expiry date on your own offer if your purchase is likely to take longer than expected.
Frequently asked questions
How long does a mortgage application take?
It varies by lender, case complexity and how quickly documents are supplied, so treat any timeline as a general guide rather than a promise. A Decision in Principle is commonly issued within minutes to a day. The full application, from submission to formal mortgage offer, is commonly quoted as taking around two to six weeks, though it can run longer if a valuation is delayed, underwriting raises queries, or your circumstances are more complex (self-employed income, adverse credit, or a non-standard property, for example). From formal offer to completion depends mainly on the wider property chain rather than the lender.
Will applying hurt my credit score?
A Decision in Principle usually uses a soft search, which is visible to you but not to other lenders and does not affect your credit score. The full mortgage application, once you formally apply with a chosen lender, typically involves a hard search, which is recorded on your credit file and visible to other lenders. One hard search from a mortgage application is generally a minor factor, but multiple hard searches in a short period — for example applying to several lenders in full rather than getting Decisions in Principle first — can look like a pattern of credit-seeking and may affect how your file is read. Our guide on your credit report for a mortgage covers this in more detail.
Why do mortgage applications get declined?
Common reasons include the lender's affordability calculation not stretching to the amount requested, adverse items on the credit file that fall outside the lender's criteria, income that cannot be evidenced in the way the lender requires (this often catches self-employed and contractor applicants), or the property itself failing valuation or falling outside the lender's lending criteria. Many declines are lender-specific rather than a reflection of your overall mortgage prospects — a different lender's criteria may fit your circumstances better. See our guide on mortgage declined for affordability reasons for what commonly goes wrong and what to check next.
Can I apply to more than one lender?
You can get Decisions in Principle from more than one lender without much concern, since these are commonly soft searches. Once you move to a full application, it is standard practice to proceed with one lender at a time — submitting full applications to several lenders simultaneously is unusual, can mean multiple hard credit searches, and most brokers and lenders expect a single live application per property purchase. If your first full application is declined or falls through, you would typically then apply to an alternative lender.
Last updated: August 2026
