100% Commercial Mortgage: How to Borrow Without a Deposit

A 100% commercial mortgage — borrowing the full purchase price with no cash deposit — is possible in the UK, but it is not a standard product offered by high-street banks or most mainstream commercial lenders. Conventional commercial mortgage LTVs sit between 65% and 75% of the property's value, meaning a deposit of 25%–35% is normally required at completion.

The route to 100% loan to value commercial mortgage borrowing almost always involves pledging additional security. This typically means using equity in another property — a business owner's residential home, a separate commercial asset, or other real estate held outright or with sufficient equity — as a second charge or cross-collateral guarantee. The lender's total exposure across both properties remains within their acceptable LTV parameters, even though the commercial property itself is funded at 100%.

It is important to understand that what is marketed as a '100% commercial mortgage' is, structurally, a secured loan against a portfolio of assets rather than a deposit-free product. Specialist lenders who consider these cases are assessing the combined security package, not simply the commercial property in isolation. This distinction matters when budgeting transaction costs, as dual valuations and additional legal work increase the overall cost of completion.

The mechanism behind most 100% commercial mortgage transactions is cross-collateralisation. The lender takes a first legal charge over the commercial property being purchased and a second (or first) legal charge over the additional security property. The combined loan to value across both assets typically must not exceed 65%–70%, placing total exposure within conventional commercial lending parameters.

As a practical example: if you are purchasing a commercial property worth £500,000 and wish to borrow the full purchase price, you would need to provide a separate property with sufficient equity. If you own a residential property worth £400,000 with a £100,000 mortgage outstanding — giving £300,000 of net equity — the lender's combined exposure would be £500,000 against total assets worth £900,000, a blended LTV of approximately 56%. Many specialist lenders would consider this favourably.

Second charge arrangements are used where the cross-collateral property already carries a mortgage. The 100% commercial mortgage lender takes a second charge behind the existing first-charge lender, provided the combined debt remains comfortably within acceptable LTV limits. The existing first-charge lender will need to consent to the second charge being registered, which adds a procedural step to the transaction.

Some lenders will consider a debenture over a trading business or a director's personal guarantee in addition to or alongside a property charge, though this is more common in business acquisition finance than in pure commercial property purchases. The criteria vary considerably across the specialist market, making it essential to work with a broker who can identify which lenders will consider your specific security package. See our commercial mortgages service for an overview of the products available through Construction Capital's lender panel.

Lenders who consider 100% commercial mortgages apply stricter eligibility criteria than they would for a standard 65%–75% LTV commercial mortgage. The absence of a cash deposit is offset by cross-collateral security, but underwriters will scrutinise the borrower's profile in detail before issuing a credit-backed decision in principle.

Adverse credit — including County Court Judgements (CCJs), missed payments, or prior insolvency — significantly reduces the pool of lenders willing to consider a 100% commercial mortgage. Most specialist lenders require a clean or near-clean credit profile when the LTV is already at its upper limit, as adverse credit compounds the perceived risk of the transaction.

Limited companies can apply for a 100% commercial mortgage, and specialist lenders will typically require personal guarantees from directors in addition to the cross-collateral security. Special purpose vehicles (SPVs) are considered on a case-by-case basis, with lenders placing greater weight on the directors' track record in commercial property and the quality of the security package. First-time commercial property buyers will find the criteria tighter still, as lenders prefer borrowers with a demonstrable history of managing commercial assets or running a trading business.

Lender appetite for 100% LTV commercial mortgage borrowing varies materially by property type. The quality, liquidity, and end-user demand for the underlying asset all feed directly into the credit team's view of risk, because the security package must hold its value over the full term of the loan.

Owner-occupied business premises across office, retail, and industrial sectors are the most straightforward proposition. A trading business with two to three years of accounts, a clear need for the property, and a stable operating profile fits well within most specialist lenders' criteria. Light industrial units, trade counter premises, warehousing, and professional offices all receive broad appetite. Larger retail schemes and high-street shops attract more nuanced underwriting — lenders look carefully at footfall trends, lease covenant strength where the property is investment-let, and the competitive position of the local centre.

Mixed-use assets — typically a ground-floor shop or office with residential flats above — are common in UK town centres and often fit the 100% cross-collateral framework well, provided the income split and tenure arrangements are clearly documented. Specialist operating assets such as hotels, care homes, pubs, and HMO (houses in multiple occupation) stock are considered by a narrower pool of lenders who understand the trading dynamics of each sector. For these asset classes, the borrower's operational experience is weighted heavily alongside the property security. Expect the due diligence process to include detailed trading information, EPC data, any regulatory licensing evidence, and comparable sales evidence before a formal offer is issued.

Pure investment assets — those let to third-party tenants — are underwritten on rental income cover as well as LTV. Interest cover ratios typically sit between 130% and 150% at 100% LTV, with lenders stress-testing income against a notional rate rather than the pay rate. Where the property is vacant at purchase, a specialist lender will often require a serviced-debt buffer or a shorter initial term to bridge until a tenant is secured.

Interest rates on 100% commercial mortgages are higher than those available on standard commercial mortgage products, reflecting the elevated risk profile. While rates on a conventional 65% LTV commercial mortgage typically range from approximately 5.5%–7.5% p.a. depending on lender type, property type, and borrower profile, 100% LTV products structured via cross-collateralisation generally price at 1%–2% above equivalent lower-LTV products from the same specialist lender.

Indicative rate ranges for 2026 — subject to individual lender criteria, property type, and prevailing market conditions:

Arrangement fees on 100% commercial mortgage products typically range from 1.5%–2.5% of the loan amount — meaningfully higher than the 1%–2% arrangement fee charged on standard commercial deals. Valuation fees apply to both the commercial property being purchased and the cross-collateral property, adding several thousand pounds to transaction costs depending on property size and type. Legal fees are also higher than a single-property transaction given the complexity of the dual-charge security package.

Borrowers should assess the total cost of borrowing — not just the headline interest rate — when evaluating whether a 100% commercial mortgage is the most cost-effective route. An experienced broker can model total transaction costs across multiple structures, including combinations of first-charge commercial mortgage and mezzanine finance, to identify the most efficient option for each case.

The 100% LTV commercial mortgage market is a specialist niche. High-street names such as Barclays, Lloyds, and NatWest operate at conventional LTVs — typically capping owner-occupied commercial mortgages at 70%–75% and investment commercial mortgages at 65%–70%. Their internal credit policies rarely flex to true 100% LTV lending on a single asset, even where the borrower profile is strong, because their commercial credit frameworks are calibrated for lower-risk portfolios at scale.

The lenders who actively consider 100% commercial mortgage structures are specialist and challenger banks with dedicated commercial real estate teams. Shawbrook, InterBay, Together, and a number of private credit funds have all placed transactions where day-one cross-collateral security brings blended LTV back within their normal appetite. These lenders publish indicative criteria but price each case individually based on the strength of the security package, the borrower's trading profile, and the exit or serviceability evidence.

Importantly, lenders in this space are rarely accessible to retail borrowers directly — most operate via intermediary-only distribution. A broker with direct commercial-desk relationships can identify which lenders are currently active, understand their live criteria (which shift with market conditions), and package the case in a format the credit team can turn around quickly. Approaching the wrong lender first can waste valuable weeks and, in some cases, prejudice later applications if a formal decline is recorded.

Because lender appetite changes frequently — new entrants arrive, existing panels reduce maximum LTV in response to market stress, and case-by-case flexibility varies with the underwriter on duty — the value of current, live market intelligence on who will and will not lend is material. Construction Capital maintains live tracking across a panel of 100+ lenders so that every 100% commercial mortgage enquiry is directed to the lenders currently most likely to deliver the required structure.

Where a 100% commercial mortgage is not achievable — because insufficient cross-collateral security is available, the credit profile is adverse, or the property type falls outside specialist lenders' appetite — several alternative financing structures are worth considering before a transaction is abandoned.

A bridging loan can provide short-term purchase finance at relatively high LTVs, often using the same cross-collateral mechanism. Bridging is priced on a monthly basis and is designed to be repaid within 3–24 months, typically by refinancing onto a term commercial mortgage once the property is tenanted or a trading income track record has been established. This suits buyers who need to move quickly but lack the documentation required for a long-term commercial mortgage at the point of purchase.

Mezzanine or second-charge lending can bridge the gap between a first-charge commercial lender's maximum advance — typically 65%–75% LTV — and the full purchase price. This effectively creates a 100% financed transaction but involves two lenders with an inter-creditor agreement in place. The blended cost of the two facilities will be higher than a single product, but this structure can be workable where the security package does not support a true cross-collateral mortgage. Our UK commercial mortgage guide covers structuring options in more detail.

Vendor finance — where the property seller agrees to defer part of the purchase price — can reduce the cash deposit required at completion. This arrangement must be disclosed to the commercial mortgage lender and structured carefully so it does not adversely affect the security or serviceability calculations. It is more common in business acquisitions and commercial property sales between known counterparties than in open-market transactions.

Development finance may be the appropriate route where the commercial property requires material refurbishment or conversion before it is tenanted and mortgageable on a long-term basis. Development lenders advance funds in tranches against a monitored build or refurbishment programme, with the exit typically a commercial term mortgage or asset sale. See our guide on development finance vs bridging loans for a comparison of these short-term structures.

Given that 100% commercial mortgage products are offered exclusively by specialist lenders and require a carefully structured security package, the application process is materially more complex than a standard commercial mortgage. Working through an experienced broker with direct lender relationships — rather than approaching lenders directly — is strongly recommended to ensure the case is packaged and presented correctly from the outset.

To prepare a strong application, borrowers should assemble the following documentation before approaching a broker or lender:

• Two to three years of business accounts (profit and loss, balance sheet) or personal SA302 tax calculations if self-employed
• Evidence of the additional security property — current mortgage statement, recent surveyor's valuation if available, and Land Registry title confirming ownership
• Business plan and cash flow forecast, particularly where the commercial property is owner-occupied or is being purchased as part of a business acquisition
• Personal asset and liability statement for all directors or guarantors
• Details of all existing borrowing against properties in the proposed security package
• Solicitor details — dual-charge transactions require a solicitor experienced in commercial property and secured lending

The specialist lender will commission independent valuations on both the commercial property and the cross-collateral property. Combined valuation costs typically range from £1,500 to £5,000 or more, depending on property size, type, and location. Legal due diligence is similarly elevated compared with a single-property transaction, with solicitors reviewing title, any overriding interests, existing charges, and the inter-creditor position where a second charge is being taken.

Timescales for a 100% commercial mortgage are typically longer than a standard commercial deal — allow 6–10 weeks from formal application to completion, depending on lender, the complexity of the security package, and solicitor availability. A broker who actively manages the lender, valuer, and legal teams in parallel can materially compress this timeline and reduce the risk of deal failure caused by communication delays between parties.

A 100% commercial mortgage is achievable but rarely straightforward. The combination of specialist lender access, security package structuring, and dual legal work means the difference between a well-run application and a disorganised one can be measured in weeks of delay and thousands of pounds in wasted valuation and legal fees. An experienced adviser adds value at every stage — from initial feasibility through heads of terms to drawdown.

Backed by Matt Lenzie's 25+ years in property finance and over £500M arranged across his career, Construction Capital works with a panel of 100+ specialist commercial lenders, challenger banks, and private credit funds. Our commercial mortgage desk handles owner-occupied, investment, mixed-use, industrial, retail, hotel, care home, and HMO transactions, and we specialise in structuring cross-collateral and combined-facility solutions for borrowers who need a 100% LTV outcome.

Before committing to any application, we recommend a confidential feasibility conversation. We review the commercial property you intend to acquire, the additional security you can offer, your trading profile, and your intended timeline, and then shortlist the lenders currently most likely to deliver the structure you need. There is no obligation — and no application is submitted without your sign-off on the indicative terms. To discuss your transaction, contact the Construction Capital commercial mortgage team for an initial discussion.