Remortgage with Additional Borrowing Guide 2026
Your complete mortgage journey — every stage, every party, every document. Select your journey below and click any stage to learn more.
Written and reviewed by Sophie Harrison · Page last reviewed 8 April 2026
What are you doing?
What type?
Remortgaging › Residential › Remortgage (switch to a new lender) › + Additional funds
Click any stage to learn more
Sourcing & research
Review the market: rates, criteria, affordability.
You research lenders and products — rates, fees, LTV tiers, and criteria eligibility. Compare the whole market against your existing lender's retention offer. An affordability sense-check at this stage sets realistic expectations before any formal approach. Mortgage Compare models this for you across 40+ lenders instantly.
Not sure which? Read our broker vs going direct guide
Fact find & advice
Broker gathers your full financial picture and recommends a suitable product.
Decision in principle (DIP)
High-level credit and affordability check with the lender.
Purpose of additional funds
Lender assesses the stated purpose of the capital raising.
Full mortgage application (FMA)
Complete application with full property and income detail, documents uploaded.
Underwriting assessment
Offer or declineLender assesses the application. Valuation and conveyancing proceed alongside.
Application review
Underwriters verify income, credit, documents, and policy compliance.
Valuation & survey
Surveyor visits your property and reports to the lender.
Conveyancing (pre-offer)
Solicitor begins searches and enquiries before the offer arrives.
Mortgage offer
Formal offer issued. References the ESIS. Can only be rescinded in limited circumstances.
Legal transfer
Solicitor handles the mortgage charge transfer from old lender to new.
Completion
New mortgage completes. Old lender redeemed. New rate and payments begin.
First mortgage payment
Direct debit collected, typically ~1 month after completion.