Stages of a mortgage application
1. Agreement in principle
A lender indicates how much it may lend after a soft credit check. Useful for house-hunting and showing estate agents you're serious.
2. Full application
After your offer is accepted, you submit ID, income proof, bank statements and property details, usually through a broker or the lender's portal.
3. Underwriting checks
The lender assesses affordability, runs a hard credit check and may ask follow-up questions about your spending or income.
4. Property valuation
The lender instructs a valuation to confirm the property is worth roughly what you're paying and is adequate security.
5. Mortgage offer
If satisfied, the lender issues a formal offer to you and your solicitor, typically valid for three to six months.
Documents lenders usually ask for
Having these ready before you apply is the single biggest factor in a fast decision.
| Document | Why the lender wants it | Typical requirement |
|---|---|---|
| Photo ID | Confirm identity (anti-money-laundering) | Passport or driving licence |
| Proof of address | Confirm where you live | Utility bill or bank statement, last 3 months |
| Payslips | Verify employed income | Last 3 months |
| Accounts / SA302s | Verify self-employed income | Last 2 to 3 years |
| Bank statements | Check spending and deposit source | Last 3 to 6 months |
| Deposit evidence | Confirm funds and their source | Savings or gifted-deposit letter |
Self-employed and contractor applicants are usually asked for more history than employed applicants.
Agreement in principle vs mortgage offer
| Agreement in principle | Mortgage offer | |
|---|---|---|
| When | Before house-hunting | After full application and valuation |
| Check type | Usually soft | Hard credit and affordability |
| Binding? | No | Yes, subject to conditions |
| Property linked? | No | Yes, tied to a specific home |
| Validity | 60 to 90 days | 3 to 6 months |
How to avoid delays
Most hold-ups come from missing or inconsistent paperwork, not the lender being slow.
- Gather every document before you apply, not after the lender asks.
- Check your credit report and fix errors well in advance.
- Avoid large or unusual transactions in the months before applying.
- Respond to underwriter questions quickly, the same day if you can.
- Use a broker if your income is complex (self-employed, bonuses, multiple jobs).
Have your documents ready
Gather ID, recent payslips or accounts, and bank statements before you apply. Complete, tidy paperwork is the single biggest factor in a fast approval, and it reduces the chance of follow-up questions that stall the process.
What underwriters are really looking for
Underwriting is where the lender decides whether the loan is safe. They assess affordability by stress-testing whether you could still pay if rates rose, they confirm your income is stable, and they look at your credit history for missed payments or excessive borrowing.
They also scrutinise your bank statements. Regular gambling transactions, undisclosed loans, or a deposit that suddenly appears without explanation can all prompt questions or a decline. Being able to show where your deposit came from, savings, a gift, or the sale of another property, keeps things moving.
If the valuation comes back lower than the purchase price (a 'down valuation'), the lender may reduce how much it will lend, which can mean renegotiating the price or finding extra deposit.