Hampshire

Semi-Commercial Mortgages in Southampton

Mortgages and finance for shops with flats above, mixed-use blocks and other part-commercial, part-residential property in Southampton.

Matt Lenzie
Written and reviewed by Matt Lenzie Founder & Principal Broker · 25 years arranging semi-commercial and mixed-use finance
82
Local planning schemes
56
Residential units in pipeline
£250k
Residential median (local)
2,572
Residential sales, 12 months

Semi-commercial mortgages in Southampton fund part-commercial, part-residential property: a shop with a flat above, an office with residential upper floors, a pub with accommodation, or a larger mixed-use block. We arrange them across Hampshire for investors, owner-occupiers and limited companies, structuring the loan around the split between the commercial and residential parts and placing it with the lenders that actually treat these assets well.

We assess a Southampton semi-commercial case on its combined commercial and residential fundamentals, with the local residential market as a gauge of the value and lettability of the living space. That market is active and liquid, around 2,572 residential sales in the past year at a £250,000 median, which helps test the residential element of a shop with a flat above or a mixed-use block.

How we structure semi-commercial finance for Southampton property

We arrange the full range of semi-commercial and mixed-use finance for Southampton property. A semi-commercial mortgage funds the purchase or refinance of an investment or owner-occupied mixed-use asset, typically to 70 to 75 percent of value, priced from around 6.5 to 8.5 percent a year. Where the residential element is large, a mixed-use mortgage may be sized on the blended income from both parts. Semi-commercial bridging covers a quick purchase, an auction lot or a property that needs works before it will support a term loan, usually from around 0.70 to 0.95 percent a month. For landlords holding several mixed-use or part-commercial assets, portfolio finance consolidates them under one facility. Once an asset is stabilised and let, a semi-commercial remortgage moves it onto a keener rate and releases equity for the next purchase in Hampshire.

Mixed-use assets we finance across Southampton

Each kind of mixed-use asset is treated differently by different lenders, and we arrange finance for all of them in Southampton and across Hampshire. That covers the classic shop with a flat above, offices with residential upper floors, pubs and guest houses with owner or letting accommodation, restaurants and takeaways with flats, retail parades with residential uppers, HMOs above commercial units, surgeries and professional premises with living space, and larger mixed-use blocks. The key question every lender asks is how much of the property, by floor area or value, is residential against commercial, because that split decides which desk will lend and on what terms. Local planning records show 56 residential units in the Southampton pipeline, a measure of the mixed-use and conversion activity that drives demand for this kind of finance in the area.

What the Southampton market means for a semi-commercial valuation

Southampton is a value market within Hampshire, where keener prices can lift the yield on a mixed-use asset. Lenders will look closely at the strength of the commercial tenancy and the lettability of the residential space, so clear local evidence, of the kind set out below, helps secure competitive terms here.

Southampton is a working port city with two distinct economic engines that shape its development tape: the container terminal and cruise berths on the western shore, and the University of Southampton with its 22,000-strong student body anchoring the northern arc through Highfield and Portswood. That dual base gives the city a deeper resale market than its size alone would suggest, with 2,571 transactions in the twelve months to March 2026 clearing through a £250,000 median. The price distribution by type tells the affordability story plainly: flats at £158,499, terraces at £260,000, semis at £300,000 and detached houses at £385,000. That puts Southampton's flat median roughly 36% below the city-wide median, which is the gap that drives the PBSA and HMO investment case. The 2.2% year-on-year softening is consistent with what we are seeing across South Coast secondary cities this quarter, and it reflects buyer caution at the entry-level flat band rather than distress in family housing stock.

The residential element: what local values tell a lender

Recent transactions set tight per-unit anchors for sponsors underwriting conversion exits. Freehold semis on Waterloo Road traded between £300,000 (89 Waterloo Road, SO15 3BS) and £310,000 (91 Waterloo Road, same postcode) on 26 March 2026, which is the directly relevant comparable set for the 52-54 Waterloo Road consented scheme one street along. A detached freehold at 3 Heath Road SO19 2QF cleared at £315,000 on 24 March, anchoring the eastern Southampton family house band. The leasehold flat tape is wide: a flat at 78 Portswood Road SO17 2FB (Flat 4, Lowmans House) sold at £127,500 while Flat 6 in the same building cleared at £210,000, showing how unit size and floor level swing per-flat exits inside a single conversion block. The lower entry points are stark, with Flat 105, 25 Latimer Street SO14 3EP clearing at £65,000 and Flat 10, Simco Court (81 Northlands Road, SO15 2DQ) at £64,000. Sponsors should not project these basement comparables forward for newly converted product, but they do illustrate the floor risk if quality or specification slips.

This residential evidence values the living space within a mixed-use property and gauges how readily it would let or sell. It is not a guide to the commercial unit's value, which is tenant and covenant driven.

Residential sold price by type (Southampton)

Detached£390,000
Semi-detached£300,000
Terraced£260,000
Flat / apartment£159,123

Source: HM Land Registry residential price-paid data, last 12 months.

Recent price trend

QuarterMedianSales
2024-Q3£262k893
2024-Q4£250k864
2025-Q1£260k964
2025-Q2£240k615
2025-Q3£239k1205
2025-Q4£256k700
2026-Q1£255k522
2026-Q2£253k61
Pipeline

Mixed-use and residential pipeline across Hampshire

Relevant planning activity recorded by Southampton City Council, a read on local conversion and mixed-use development that drives demand for semi-commercial finance.

  • 7 Chessel Avenue Southampton SO19 4DY

    SO19 4DY Awaiting decision

    Erection of a single-storey timber car port.

    View on the planning portal
  • 21 22 Palmerston Road Southampton SO14 1LL

    SO14 1LL Awaiting decision

    Change of use from a public house (Sui Generis) to 6-person care home (Class C2)

    View on the planning portal
  • Office At rear of 189 Portswood Road Southampton SO17 2NF

    SO17 2NF Awaiting decision

    Change of use from office to education and day care facility for children with special educational needs (use class F1(a)).

    View on the planning portal
  • 47 The Polygon Southampton SO15 2BP

    SO15 2BP2 units Awaiting decision

    Application for a lawful development certificate for the existing use of 2 flats as houses in multiple occupation (HMO, Class C4).

    View on the planning portal
  • 168 Weston Lane Southampton SO19 9HL

    SO19 9HL Awaiting decision

    Formation of a vehicular access with dropped kerb

    View on the planning portal
  • Land Adj 76 Winchester Road Southampton SO16 6US

    SO16 6US1 units Awaiting decision

    Partial adjustment of site levels and construct part 2/part 4 level building with roof terrace, for use as specialist supported accommodation of mixed use (Class C2/C3) comprising 5 x 1 bed flats, with associated enclosed garden, communal accommodation and sta…

    View on the planning portal
Evidence

Recent residential sales in Southampton postcodes

A sample of recent residential transactions across SO16, SO18, SO19, SO17, SO15, evidence for valuing the residential element of a semi-commercial property rather than a guide to commercial values.

AddressPostcodeTypePriceDate
62, BRIARSWOOD SO16 6GD Flat / apartment £165,000 29 April 2026
15, BEECH AVENUE SO18 4HR Terraced £270,000 27 April 2026
59, ATHELSTAN ROAD SO19 4DE Semi-detached £305,000 24 April 2026
2, PENISTONE CLOSE SO19 9HS Terraced £299,999 24 April 2026
8, VIKING CLOSE SO16 8BZ Terraced £273,000 24 April 2026
14, BELTON ROAD SO19 1DS Semi-detached £320,000 24 April 2026
FLAT 26, CHESTNUT COURT, 45, SHAFTESBURY AVENUE SO17 1SE Flat / apartment £67,000 22 April 2026
69, MANSFIELD PARK STREET SO18 5AE Flat / apartment £175,000 22 April 2026
21, WESTROW GARDENS SO15 2LZ Semi-detached £360,000 22 April 2026
4, JUBILEE GARDENS SO18 6LX Detached £330,000 22 April 2026
FAQ

Semi-commercial mortgages in Southampton: common questions

How much can I borrow on a semi-commercial mortgage in Southampton?

Most lenders fund up to 70 to 75 percent of value on a semi-commercial mortgage, with the loan sized on the combined commercial and residential rent at an interest cover ratio. The Southampton residential market, currently active and liquid, informs the value a lender will place on the residential element of a mixed-use asset.

Which lenders offer semi-commercial mortgages in Southampton?

We hold more than one hundred lender relationships across high street banks, challenger banks and specialist lenders. The right lender for a Southampton semi-commercial deal depends on the commercial-to-residential split, the leverage you need and whether you borrow personally or through a limited company, and we shortlist the desks most likely to fund it across Hampshire.

How does the Southampton residential market affect a mixed-use property?

It matters because the flats and living space within a semi-commercial asset are valued against local residential evidence. HM Land Registry records a £250,000 residential median in Southampton over the past year across roughly 2,572 sales, with flats around £159,123. The commercial element, by contrast, is valued on its tenant, lease and yield, which we assess case by case.

Do you arrange semi-commercial finance beyond Southampton?

Yes. We arrange semi-commercial and mixed-use mortgages across the whole of Hampshire and the wider UK, with the same approach: assess the commercial and residential split, model the combined income, and match the case to the lenders that treat that asset well.

Buying or refinancing in Southampton?

Send us the property details and we will come back with a view on lenders and likely terms within one working day.