Semi-Commercial Mortgages (Mixed-Use Property Finance)
A semi-commercial mortgage sits somewhere in between a residential buy to let mortgage and a commercial mortgage. This is essentially bridging the gap for a property investment that is mixed-use - having income coming from both residential and commercial elements, needing more attention when being underwritten by a lender. We advise investors, landlords and developers on all types of semi-commercial mortgage finance throughout the UK - connecting them with the right lenders and matching their appetite to the realities of the asset, the type of tenants that occupy the property and the intended exit.
Speak with one of our experts about a semi-commercial mortgage enquiry.
Semi-Commercial Mortgages: At a Glance
Loans typically from £150,000 - £10m+
Up to 70-75% loan to value, depending on the mix and strength of the income
Access to a broader range of specialist semi-commercial lenders than might be expected when dealing with high street banks
Experience in dealing with a variety of complex income scenarios and mixed-use valuations
Available across retail, office, industrial and residential property combinations
Is Semi-Commercial Finance Right For You?
A semi-commercial mortgage is specifically for those properties where the value and the income are derived from both residential and commercial premises and neither factor can be discounted when assessing if it is suitable for lending.
The question is not simply - is this property mixed-use, but to what extent does the mix impact risk, reliance on income and ultimately, the saleability of the property down the line. Lenders do not see mixed-use assets in the same way as simply combining two distinct components. They look at how the residential income fares under stress tests, what the commercial lease looks like over the long term, and what the combined asset could achieve on a sale?
Where a property sits more on the residential side, due to more reliable income and demand, more lenders are usually available and the terms may be a little more flexible. However, as the commercial element becomes more of the predominant driver of income and value, the underwriting will focus more on the lease strength and tenant covenant of the commercial premises as well as the marketability of the unit.
This is where semi-commercial property finance fits - allowing both income streams to be considered in the correct light, than trying to pigeonhole an asset into either a residential or a commercial product where it does not fully fit.
More often than not, a borrower finds themselves exploring a semi-commercial product because a standard buy to let mortgage is insufficient to cover the borrowing requirements due to the commercial income or where a full commercial mortgage would underestimate the true value of the residential side of the asset.
It is more about matching the property correctly within the market than defining it as one thing or another, leading to a smoother underwriting process and a reliable route to completion.
Investor vs Owner-Occupier Semi-Commercial Mortgages
Borrowers of mixed-use mortgages can be borrowing for investor or as an owner-occupier. The structure, underwriting and available lenders can materially differ depending on the intention of how the property is going to be held.
Investors and landlords place a focus on sustained income and the longevity of their investment. Lenders take a balanced approach by examining income from both a commercial lease and at residential affordability. Additionally, lenders will scrutinise your professional experience within portfolios, tenant types, lease agreements, the lease on your investment property and what your business exit plan looks like. This is typically where semi-commercial lending overlaps with buy to let and commercial investment mortgages.
For owner-occupiers, the commercial property becomes more central. Lenders will place greater weight on the trading business, its financials and its ability to support repayments, alongside the underlying property value. Residential units may still contribute to the overall assessment, but underwriting for the transaction is likely to be more in line with commercial mortgage principles.
Sometimes the distinction isn't clear, for example a property may be partly owner-occupied with additional rental income, or an investor may operate a business from part of the building. Another scenario could be multi-let residential units above commercial premises, for example HMO property. The priority is understanding which element drives the highest risk and contribution to the income, so that the application and loan can be structured accordingly.
How semi-commercial mortgages work in practice
The major difference when it comes to mixed-use mortgages is how income is assessed by lenders. Residential and commercial income are evaluated separately and then blended to create an overview of the borrower's affordability. The weighting of income and the underwriting approach will also depend on whether the borrower is an investor or an owner-occupier.
The residential income is usually assessed in a similar fashion to a stress test done on buy to let properties, with set assumed interest rates and required cover ratios. Income from the commercial premises is reliant more heavily on the terms of the lease, the strength of the tenant covenant and the market rent that can be achieved. However, not both income streams are given the same weighting.
In reality, lenders use blended underwriting. Some prioritise the residential income if it is the larger source of income for the property. Others will take more of a commercial approach when it is clear that the ground floor unit is what holds the larger part of the value of the property. This is where finding the right lender comes into play, because their appetite can differ.
Depending on your intended exit, the structure of the loan will differ too. For example, those looking to buy and hold will see lenders requiring evidence of stable and sustainable income streams. However, if the investment strategy is more short term, perhaps carrying out light refurbishments or repositioning a commercial tenant, then bridging or transitional finance may be the better choice for a period before transitioning into a term semi-commercial mortgage.
Timelines are fairly similar to that of commercial lending, with straightforward cases usually able to complete within four to six weeks. However, a complicated valuation process or extensive lease review could potentially extend this timescale.
Residential versus commercial weighting and why it matters
One often-misunderstood feature of semi-commercial mortgages UK is how the weighting split between the residential and commercial income will affect your deal. In investor-led transactions, this weighting often determines whether the deal is treated closer to a buy to let or commercial investment mortgage. For owner-occupiers, the weighting interacts with business performance and affordability rather than purely rental income.
Where the residential income is the dominating force, say, above 60-70% of the total income, more lenders will be open to lending and the terms can often move closer to that of a buy-to-let product. This could lead to a cheaper rate on the loan and a higher loan to value level can also be considered.
If the commercial income takes up a larger percentage, the investment more closely reflects a commercial investment mortgage. Lenders will begin to take more notice of the lease structure, the type of tenants that occupy the building and the general marketability of the commercial premises. Loan to value will often become more conservative and the price will reflect the higher risk presented to the lender.
There is no hard-set rule when it comes to these thresholds. Each lender has their own definition of what they deem an acceptable residential and commercial split, which is where experience of working with this market makes a difference, because a deal that might be just outside of one lender's criteria, could potentially be more comfortably within another's.
Valuation approach for mixed-use assets
Valuation forms the core of any semi-commercial mortgage. However, valuation for mixed-use assets will take on a more nuanced approach, given that both residential and commercial values are being considered.
Residential property is generally valued using the comparable method - where a similar flat or house will be looked at in the same local area, reflecting on its value, features and location. Commercial property is generally valued using the investment method - based on rental income generated and its respective yield.
When it comes to mixed-use properties, valuers will often opt for a hybrid method. Valuers will assess each element of the property separately and then combine them to work out the overall asset value on an investment basis. Which valuation approach is ultimately taken will heavily depend on the split of income that the property generates, the type of commercial use within the building and how strong the local demand for that type of property is.
This is a critical aspect of use, as a strong residential side with dependable tenants can support higher valuations. Conversely, a weaker or non-let commercial unit can decrease the overall value, even if the residential component is well-rented.
Common use cases for semi-commercial mortgages
Acquiring a shop with flats above, where the residential income covers the bulk of the borrowing requirement.
Remortgaging a mixed-use investment property to pull equity out of the property as you have increased the rental income or renewed a lease term.
Stabilising a property that recently had the commercial unit let, thus demonstrating proof of reliable income.
Financing a small portfolio of mixed-use properties, consolidating them into a single mortgage facility for easier management.
Buying under-managed properties, where there is the opportunity to improve the tenant mix and income over time.
Buying or refinancing semi-commercial HMO properties, where several residential units are situated above the ground floor commercial space.
Typical lending terms and criteria
Terms for a semi-commercial property finance deal also usually sit between buy-to-let and commercial borrowing and it is fair to say this can vary from one lender to another and from one property type to another.
Loan to value can usually range from 65% to 75%. This can, however, increase depending on how the residential income outweighs the commercial income and the security of the tenants occupying the building. Debt service coverage ratios (DSCR) will be assessed based on the blended income of the property, with some lenders applying different stress assumptions for each aspect of the income stream.
With interest-only structures being commonly available, especially for buy to let properties, loan terms typically span between 5 and 25 years. However, some lenders may consider longer terms, depending on the overall borrower profile and their income.
Rates can vary, depending on the asset type, the tenant's covenant strength and the amount borrowed (loan to value). Typically, commercial mortgage rates in the UK have usually averaged anywhere between 6-8% over the last few years, varying across the different types of lenders and risk profiles.
You will need to account for arrangement fees, valuation fees and legal fees in your overall structure. Since commercial property valuations are typically more thorough, these tend to be higher in both price and timeframe.
When semi-commercial mortgages are used versus alternatives
In certain instances, a mixed-use property mortgage might not be the most appropriate financial product for the immediate needs of an investor or borrower.
In circumstances where a property is undergoing a heavy refurbishment or the commercial unit is sitting vacant and needs to be re-let and possibly rebranded, bridging finance will typically offer a bit more breathing room and flexibility to the investor in the short term. Once the income is more stable, the asset can be moved onto a term semi-commercial mortgage.
Where the property is fully commercial, without any residential element, a commercial investment mortgage would be a more suitable option for your investment. These mortgages are specifically formulated to cater for income stemming from commercial lease terms only.
If the property is fully residential, it should be approached as a standard buy to let mortgage, regardless of whether it is held within a limited company structure.
It is important to understand what stage the asset is at on the spectrum so that you are not trying to force a deal into the wrong type of mortgage. In turn, it will also increase the likelihood of a smooth and successful lending process.
Key risks lenders focus on
When it comes to dealing with semi-commercial mortgages, lenders focus on a clear view of risks across a few different areas of importance:
Tenant mix remains a primary focus for lenders. While a strong residential tenant base is helpful and can absorb some commercial risk, weak or short-term commercial leases can still make or break a deal. Other elements of a commercial lease, such as lease structure, lease length, break clauses and rent reviews will also influence how the asset is perceived by lenders.
Vacancy risk is also an important consideration. A vacant commercial unit naturally introduces uncertainty, even when the residential element of the property is fully let. Lenders will be looking closely at the local demand for that commercial unit and how easily it can be re-let if it becomes vacant.
Management complexity can also influence lenders' opinions, because mixed-use properties tend to involve a wider array of tenants, lease structures and maintenance responsibilities. As this complexity can have a bearing on income stability, borrower experience with mixed-use assets is preferred (although not always mandatory in all circumstances with some lenders).
Location always plays a key part. Properties situated in a thriving retail or mixed-use neighbourhood are likely to be perceived as less risky by lenders than those located on an out-of-the-way street in an area where there is limited demand for commercial units.
Why work with a broker on semi-commercial mortgages
The market for semi-commercial lenders is fragmented and their criteria are not always published in the same clear and transparent way that you might find on a high street bank's website, with lenders varying their appetite depending on the current market conditions.
Working in this market takes you beyond finding the best interest rate. It requires an understanding of how the different lenders view and interpret the various types of income streams, how they approach different types of property and what they assume will happen with valuations of properties.
By working with us, you can benefit from a team with the in-depth knowledge needed to source the right lender for your client and asset, than just the most competitive headline rate. Besides major high street banks, we also liaise with smaller banks, specialist niche lenders and even private funders that you may not have heard of or be able to access via traditional routes.
We help add value by creating and presenting the deal in the exact same way that lender underwriters review and assess the risk, clearly outlining all of the relevant income streams, summarise leases and detail the property valuation - with each of these elements having the potential to greatly impact the overall outcome of your application.
From Initial Discussion to Completion: Our Process
Initial Discussion
Terms of Business and Information Gathering
Lender Identification and Indicative Terms
Formal Application and Credit Submission
Valuation and Legal Process
Offer, Completion and Drawdown
Semi-Commercial Mortgages FAQs
A semi-commercial property has both residential and commercial elements, with rental income coming from both. Common examples include retail units with flats above or office space combined with residential accommodation.
They assess residential and commercial income separately, then combine them using blended underwriting. Each element is subject to different stress assumptions and risk weighting.
Typically between 65% and 75%, depending on the lender criteria, balance of residential and commercial income, tenancy strength and location.
Yes. Interest-only commercial mortgages are common, particularly for investment properties where the focus is on income rather than amortisation.
In most cases, yes. The inclusion of commercial risk means pricing sits closer to commercial mortgage levels.
Some lenders will consider this, but terms are usually more conservative. In some cases short-term bridging finance may be beneficial until the unit is let.
Yes. A semi-commercial remortgage is common where value has increased or where existing terms are no longer competitive.
Not always, but experience can strengthen an application, particularly for more complex assets or larger loan sizes.
Mixed-Use Commercial mortgages
Although not as straightforward as securing a residential mortgage, semi-commercial mortgages are ideal for investors who have properties that span across various sectors, providing a flexible approach. Typically, the rates offered by lenders will fluctuate based on the mix of residential and commercial income, the overall security of the tenants and the approach that lenders take with property valuations.
Finding the right lender for a mixed-use property and structuring the deal based on realistic expectations of income and your intended exit will be crucial for those seeking these types of loans. If you are currently looking to acquire a property, use our commercial stamp duty calculator to estimate your SDLT liability.
Talk to one of our specialists to review your semi-commercial mortgage inquiry and find out which products are suitable for you.
