Securing finance for investment property in the UK can feel like threading a needle in a storm. Whether you’re a seasoned landlord expanding your portfolio or a business owner acquiring new premises, you need a broker who understands commercial lending from every angle.

Commercial buy to let mortgages are loans secured against property used for business purposes. Unlike residential loans, these are structured around business performance and risk, with repayment terms typically spanning three to thirty years. Many investors choose them for long-term stability, potential tax advantages, and protection from rent inflation. The borrowing limit depends on property value, projected income, and borrower profile, with lenders usually requiring a 25% deposit.

We selected brokers with strong lender networks, transparent processes, and consistent success in handling complex property finance cases. Each delivers market-wide access and tailored support designed to help investors secure competitive buy-to-let commercial mortgage terms.

Top UK Brokers Compared

Broker Overviews

1. KIS Finance

Rating: 4.9

KIS Finance ranks among the leading UK commercial mortgage brokers for its transparency, strong lender access, and deep expertise in complex cases. The firm works with high street banks, challenger lenders, and specialist funders to structure deals suited to each client’s goals. Loans typically range from £100,000 to over £250 million, with both interest-only and capital repayment options available.

KIS handles diverse cases, including borrowers with limited credit history, mixed-use properties, and international investors. The firm also arranges portfolio purchases and refinancing deals. Fees usually include up to 1% broker commission, lender arrangement fees of 1–2%, and variable legal and valuation costs. Applicants are expected to provide three years of accounts plus forecasts. The consultative process emphasizes clarity and personal guidance without sales pressure. With over £1 billion in arranged bridging loans, KIS has built a reputation as one of the UK’s most reliable brokers for complex and high-value commercial property finance.

• Headquarters: Cullompton, UK
• Loan Range: £100,000 – £250 million+
• Loan-to-Value (LTV): Up to 75% (100% with additional security)

LinkedIn: https://www.linkedin.com/company/kis-finance

2. Newable

Rating: 5.0

Newable is a long-established UK commercial mortgage broker with a strong record in SME and landlord finance. Founded in 1982, it operates on a whole-of-market basis, collaborating with more than 200 lenders, from mainstream banks to challenger and niche institutions.

The firm provides structured solutions for property acquisition, refinancing, development projects, and owner-occupied premises. Its advisory process includes eligibility checks, loan structuring, and coordination with valuers and solicitors. Clients typically supply financial statements, forecasts, and property details for assessment. Beyond commercial mortgages, Newable offers bridging, development, and auction finance, along with asset and invoice funding. Fees vary depending on complexity and may include arrangement, valuation, and legal costs. As an FCA-regulated firm, Newable provides clients with regulatory oversight and a high level of professional accountability.

• Headquarters: London, UK
• Loan Range: Not publicly disclosed (broad SME and property scope)
• Loan-to-Value (LTV): Variable, dependent on lender and project/property use

LinkedIn: https://www.linkedin.com/company/newable

3. Swoop

Rating: 4.8

Swoop, founded in 2018, merges fintech technology with expert human insight to streamline commercial mortgage access for UK businesses. The FCA-regulated firm connects SMEs to lenders through a digital dashboard that presents personalized mortgage matches, funding options, and grant opportunities. Its system functions as both a brokerage and financial management platform, giving clients an overview of their funding landscape in one place.

Loans are available for property purchase, refinancing, or development, covering both business and investment properties. Deposit requirements usually range from 20% to 40%. Clients can choose between fixed and variable rates, supported by in-house specialists averaging 15 years’ experience. Swoop also provides tools such as a commercial mortgage calculator to simplify decision-making. Broker fees are typically around 1%, with clear disclosure at the start of the process.

• Headquarters: London, UK
• Loan Range: Variable, typically 60–80% LTV
• Interest Rates: 2.5% – 6%

LinkedIn: https://www.linkedin.com/company/swoopfunding

4. Clifton Private Finance

Rating: 4.8

Clifton Private Finance, based in Bristol, focuses on bespoke commercial lending for UK and overseas clients. The firm caters to high-net-worth individuals, investors, and business owners seeking large-scale or complex funding. Typical loans range from £250,000 to £100 million, with rates starting at 2.75% and loan-to-value ratios up to 75%.

Its service is highly personalized, a dedicated broker supports the client from the initial enquiry through to completion. Clifton is known for securing structured, off-market terms across offices, retail, industrial, and mixed-use properties. As an appointed representative of Fair Investment Company Ltd and regulated by the FCA, the firm offers full compliance assurance. Initial consultations are free, and fee discussions remain transparent throughout. The phrase “concierge-style” isn’t just a label here, it’s how Clifton differentiates itself through attention and discretion.

• Loan Range: £250,000 – £100 million
• Loan-to-Value (LTV): Up to 75%
• Interest Rates: From 2.75%

LinkedIn: https://www.linkedin.com/company/clifton-private-finance

5. Watts Commercial Finance

Rating: 4.9

Watts Commercial Finance, founded in 1985, is one of the UK’s most decorated independent brokers, holding multiple Business Moneyfacts awards, including seven consecutive wins as Commercial Mortgage Introducer of the Year. The firm serves a wide spectrum of clients, from individual landlords to large companies, across property investment, owner-occupation, and development finance.

Watts connects clients to a diverse panel of lenders and promotes competitive bidding between banks to secure optimal terms. Dedicated commercial managers guide borrowers through every stage. Financing options include short- and long-term structures, interest-only or capital repayment, and fixed or variable rates. Watts does not charge upfront fees. A typical broker fee is 1.5%, with an initial £995 or 0.25% payable upon offer acceptance and the remainder on completion. As a member of the National Association of Commercial Finance Brokers (NACFB), Watts adheres to strict professional standards and industry best practice.

• Headquarters: Nantwich, Cheshire, UK
• Loan Range: Variable (often up to 80% LTV, 100% with additional security)
• Loan-to-Value (LTV): Up to 80% (100% with extra/additional security)

LinkedIn: https://www.linkedin.com/company/watts-commercial-finance

Conclusion

The UK commercial mortgage market remains a fertile ground for property investors in 2025, powered by brokers who merge broad lender access with tailored guidance and modern technology.

For investors seeking flexible or non-standard finance, KIS Finance stands out for its precision in complex, high-value transactions and expansive lending panel. Watts Commercial Finance continues to deliver award-winning reliability and structured efficiency for SMEs, while Swoop brings data-driven speed and digital accessibility to the process.

Ultimately, the right broker depends on your priorities. Whether you value the fast-track agility of a fintech, the steadiness of a long-established expert, or bespoke solutions for intricate deals, each of these firms exemplifies the evolution of UK commercial lending and the growing demand for commercial buy to let mortgages, flexible, informed, and responsive to how investors now move. After all, fortune tends to smile on those who do their homework.

Frequently Asked Questions (FAQ)

1. What exactly is a commercial buy-to-let mortgage?

A commercial buy-to-let mortgage is a loan secured against property intended for rental or business use. It enables companies to purchase or refinance premises and is structured around the projected rental income rather than personal earnings. Terms can extend up to 30 years, and lending criteria vary depending on the property’s purpose and expected yield. Many brokers specialising in commercial buy to let mortgages also provide access to lenders that support mixed-use or high-value properties.

2. Are there different types of repayment options available?

Yes. Borrowers typically choose between interest-only and capital repayment structures. Interest-only payments cover just the interest, while capital repayment includes both interest and principal. Fixed and variable rates are common, allowing borrowers to balance predictability with potential cost savings.

3. How much deposit do I usually need for a commercial buy-to-let mortgage?

Most lenders expect a minimum deposit of around 25% of the property’s value. However, brokers such as Swoop note deposits can range from 20% to 40%, depending on risk and security offered. In some cases, firms like KIS Finance or Watts Commercial Finance may secure up to 100% funding with additional collateral, particularly within the commercial buy to let mortgages sector.

4. What financial details do brokers require for an application?

Brokers assess financial strength through detailed documentation. For example, KIS Finance requests at least three years of filed accounts and forward forecasts. Most brokers also need property valuations, cash flow projections, and business plans to structure a suitable loan package.

5. How do I know the broker is acting in my best interest?

Choose brokers regulated by the Financial Conduct Authority (FCA) to guarantee oversight and client protection. Membership in bodies such as the National Association of Commercial Finance Brokers (NACFB) adds another layer of accountability. Trusted firms emphasize transparency, guidance, and long-term relationships over high-pressure tactics.