--- title: "Commercial mortgage for a block of flats" description: "A commercial mortgage for a block of flats is used to purchase, refinance, or raise capital against a residential block held under a single freehold or investment title, where the scale, structure, or tenancy profile falls outside standard residential or buy-to-let lending." url: "https://mortgagelane.com/guides/commercial-mortgage-guide/a-block-of-flats" site: "Mortgage Lane" collection: "guides" date: "2026-04-13" author: "Joseph Lane" category: "Mortgage guide" reviewed: "2026-09-11" reading_time: "4 min" byline: "Joseph Lane" author_credentials: "CeMAP · FCA authorised firm" language: "en-GB" robots: "index,follow" --- # Commercial mortgage for a block of flats A commercial mortgage for a block of flats is used to purchase, refinance, or raise capital against a residential block held under a single freehold or investment title, where the scale, structure, or tenancy profile falls outside standard residential or buy-to-let lending. A commercial mortgage for a block of flats is used to purchase, refinance, or raise capital against a residential block held under a single freehold or investment title, where the scale, structure, or tenancy profile falls outside standard residential or buy-to-let lending. [Commercial mortgage](https://mortgagelane.com/definitions?term=commercial-mortgage) Commercial An asset-backed loan secured against commercial, semi-commercial or large-scale investment property, assessed on income sustainability, asset risk and valuation methodology rather than personal affordability alone. [Read the full definition of Commercial mortgage](https://mortgagelane.com/definitions?term=commercial-mortgage) Back to overview [Commercial Mortgage Guide](https://mortgagelane.com/guides/commercial-mortgage-guide) Related definitions [Commercial mortgage](https://mortgagelane.com/definitions#def-commercial-mortgage) · [Multi-unit freehold block (MUFB)](https://mortgagelane.com/definitions#def-mufb) ## Commercial mortgage for a block of flats A [commercial mortgage for a block of flats](https://mortgagelane.com/mortgages/mufb-mortgage) is used to purchase, refinance, or raise capital against a residential block held under a single freehold or investment title, where the scale, structure, or tenancy profile falls outside standard residential or buy-to-let lending. Although the accommodation is residential in nature, lenders typically classify blocks of flats as commercial assets due to management intensity, income structure, and concentration risk. [Commercial finance](https://mortgagelane.com/mortgages/commercial-mortgages) is most commonly required where the block contains a higher number of units, is owned through a company or SPV, or is let under non-standard or specialist tenancy arrangements. ### When a Block of Flats Requires a Commercial Mortgage A [commercial mortgage](https://mortgagelane.com/mortgages/commercial-mortgages) is usually required where one or more of the following apply: - The property contains multiple self-contained units under a single title - The block comprises over 6-20 units - The borrowing is through a limited company or SPV structure - The tenant profile includes specialist or non-standard occupiers - The scale exceeds typical portfolio buy-to-let criteria In these cases, the loan is assessed under commercial mortgage lending policy, rather than residential mortgage regulation under MCOB. ### Loan-to-Value (LTV) Commercial mortgages for blocks of flats are typically available at up to 75% loan-to-value, depending on asset quality and income strength. LTV is influenced by: - Number of units and rental diversification - Tenant type and income stability - Location and underlying residential demand - Property condition and compliance - Management experience and structure Blocks with strong rental demand, good unit mix, and professional management are more likely to achieve higher leverage. ### Affordability and Lending Assessment Affordability is assessed on an income-led basis, not personal income. - Lenders apply Debt Service Coverage Ratios (DSCR) to gross or net rental income - Rental income is stress-tested against interest rate assumptions - Void allowances, maintenance, and management costs are factored in Personal income is generally irrelevant unless required to support the wider credit profile. ### Valuation Methodology Valuation of blocks of flats is typically income-based, reflecting sustainable rental income capitalised at an appropriate yield. Valuers will also consider: - Bricks-and-mortar value - Comparable investment sales - Break-up value where relevant ### Alternative exit strategies Where the tenant profile is specialist or contracted, valuers assess the durability and transferability of income as part of the valuation. ### Specialist Tenants and Larger Blocks Blocks with over 20 units or specialist tenants, such as supported living, local authority placements, student accommodation, or company lets, are always assessed under commercial criteria. In these cases, lenders focus heavily on: - Contract length and enforceability - Covenant strength of the counterparty - Regulatory and compliance risk - Concentration and management risk Higher reliance on a single operator or funding source typically results in more conservative underwriting. ### Interest Rates and Loan Terms Commercial mortgages for blocks of flats typically offer: - Loan terms of 15 to 35 years - Interest-only or capital repayment structures - Risk-based pricing linked to LTV and income quality Pricing is often competitive relative to other commercial sectors due to the perceived resilience of residential rental income. ### Commercial mortgage lending criteria Lenders will closely review: - Fire safety and compliance (FRA, alarms, licensing) - Property condition and maintenance strategy - Management arrangements and experience - Exposure to regulatory or legislative change Well-maintained, compliant blocks with diversified income attract the strongest lender appetite. A commercial mortgage for a block of flats provides scalable, long-term funding for multi-unit residential investments held under a single title. With borrowing typically available at up to 75% LTV, these facilities are suited to larger blocks, company-owned assets, and properties with specialist tenant profiles that fall outside standard buy-to-let lending criteria. ## Talk it through with an adviser Speak to a Mortgage Lane adviser about your circumstances and the next steps. Published: 2026-04-13 Last reviewed: 2026-09-11 Source: https://mortgagelane.com/guides/commercial-mortgage-guide/a-block-of-flats