Self-Build Mortgage Guide (Land & Build) 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?
Self-build
Click any stage to learn more
Land & plot search
Identify suitable land with planning potential.
Search for plots with existing planning permission or land where planning permission is likely to be granted. Consider access, utilities, ground conditions, and local authority planning policies. Plots are available through specialist land agents, auction, or private sale. Your architect and builder will be involved at this stage to assess feasibility, but they are not mortgage parties.
Planning & building regulations
Obtain planning permission and building regulations approval.
Sourcing & research
Review the market: rates, criteria, affordability.
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.
Full mortgage application (FMA)
Complete application with full property and income detail, documents uploaded.
Specialist underwriting
Build project approvedLender assesses build feasibility, contractor credentials, and project viability.
Application & project review
Underwriters assess income, credit, and the build project feasibility.
Land valuation & GDV assessment
Surveyor values the land and projects the GDV. LTV calculated against both.
Land purchase & initial drawdown
Land purchase funds released. You acquire the plot and the build can begin.
Build phase & stage inspections
Surveyor visits at key build stages: foundations, wall plate, roof, first fix, second fix.
Progressive drawdowns
Funds released at each inspection stage as the build progresses.
Final inspection & completion valuation
Surveyor confirms the build is complete. Final valuation of the finished property.
Mortgage converts to standard term
Stage payment mortgage converts to a standard repayment or interest-only mortgage.
First mortgage payment
Direct debit collected, typically ~1 month after completion.