The situation
A property-owning family is reviewing borrowing against a portfolio with an assumed value of £8.4m. It includes residential flats and two commercial units held through different companies. They want £4.2m of total borrowing, including funds for agreed property works. Values and rents would need independent verification.
What makes this more involved?
An overall 50% loan-to-value calculation does not answer the lending question. Residential and commercial income may be assessed differently. A commercial lease break, vacant unit or restricted title can change the income and security picture even when the headline gearing appears modest.
How I would approach it
Understand every asset
Separate property values, debt and rent by asset and legal owner. Review commercial lease terms, break dates, tenant information and any arrears, alongside residential tenancy records and condition.
Compare separate and combined facilities
Explore whether the available routes work better with separate security or a combined arrangement. Consider valuation and legal work, borrowing purpose, guarantees and how one asset’s difficulties could affect a shared facility.
Plan for changes in the portfolio
Discuss planned disposals, lease events and works before choosing a structure. Establish how a property could be released and how sale proceeds would be applied, subject to the agreed lender terms.
What could change the plan?
Is one mortgage always simpler?
It can reduce the number of facilities to administer, but shared security may link properties that the owner would prefer to manage separately. Release terms and lender consent matter when a sale or refinance is planned.
Can extra funds be used for the owner’s trading company?
The borrowing purpose must be disclosed and acceptable to the lender. Business use of funds can change the proposition and should be reviewed with the appropriate legal and tax advisers.
What this would establish
Identify a structure that can be assessed on its actual income, security and purpose, with clear implications for future transactions. No value, rental cover, interest rate or facility approval is assumed.
Can residential and commercial properties sit in one facility?
Some specialist structures may be considered, but acceptance depends on the lender and the complete proposal. Separate facilities may also be appropriate; ownership, lease income, security and future plans affect the comparison.
Link to this answerEducational content updated 24 September 2026. General information; individual advice requires an assessment. Lender criteria can change.
Further reading: The Mortgage Works: portfolio assessment. These references explain general criteria and do not indicate lender acceptance of this example.