Lincolnshire

Semi-Commercial Mortgages in Boston

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

Matt Lenzie
Written and reviewed by Matt Lenzie Founder & Principal Broker · 25 years arranging semi-commercial and mixed-use finance
£186k
Residential median (local)
669
Residential sales, 12 months
£85,000
Flat median (residential element)
35%
New-build premium

We arrange semi-commercial and mixed-use mortgages in Boston for purchases, remortgages and portfolios from around 150,000 pounds upward. Whether the asset is a retail unit with a flat above, a guest house, a surgery with residential accommodation or a mixed-use investment block, we assess the commercial and residential split, model the combined income, and take the case to the lenders most likely to fund it in Lincolnshire.

Lenders price a semi-commercial deal on the strength of the commercial covenant, the residential value and the combined rent. The local residential market is a direct input here, because the flats and maisonettes within a mixed-use asset are valued against it: Boston is thinner but functional, with roughly 669 residential sales over the past twelve months at a £186,000 median, a useful read on the residential half of any semi-commercial property.

Funding a mixed-use purchase or refinance in Boston

We arrange the full range of semi-commercial and mixed-use finance for Boston 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 Lincolnshire.

The semi-commercial property we fund in Boston

Each kind of mixed-use asset is treated differently by different lenders, and we arrange finance for all of them in Boston and across Lincolnshire. 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.

Mixed-use lending conditions in Boston

Boston is a regeneration market within Lincolnshire, where lower current values mean the commercial covenant and the residential demand carry the case. These markets reward investors who can evidence a reliable tenant and a lettable residential element, and lenders often want both before offering keener leverage.

The residential element: what local values tell a lender

The flats and living space within a semi-commercial asset are valued against local residential evidence, so sold-price depth is a direct input on a mixed-use deal. Boston recorded around 669 residential sales over the past year at a median of £186,000, which makes the local market thinner but functional. New-build stock carries a premium of 35% over existing stock here. The commercial element of the property, by contrast, is valued on its tenant, lease and yield, which we assess case by case.

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 (Boston)

Detached£250,000
Semi-detached£160,000
Terraced£119,000
Flat / apartment£85,000

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

Recent price trend

QuarterMedianSales
2024-Q2£190k280
2024-Q3£205k305
2024-Q4£188k297
2025-Q1£205k347
2025-Q2£182k225
2025-Q3£190k219
2025-Q4£190k193
2026-Q1£177k132
Evidence

Recent residential sales in Boston postcodes

A sample of recent residential transactions across PE21, PE22, PE20, evidence for valuing the residential element of a semi-commercial property rather than a guide to commercial values.

AddressPostcodeTypePriceDate
37, HAWTHORN CLOSE PE21 0QJ Semi-detached £155,000 31 March 2026
8, BLADON ESTATE PE21 0QZ Flat / apartment £96,500 20 March 2026
200, WYBERTON WEST ROAD PE21 7JU Detached £175,000 18 March 2026
LYDON LEA, HALL LANE PE22 0DX Detached £235,000 16 March 2026
MAWENZI, BOSTON ROAD PE20 2HD Detached £255,000 16 March 2026
PONDAROSA, SILVERTOFT LANE PE20 1RX Detached £235,000 13 March 2026
15, SAUNDERGATE PARK PE21 7BU Detached £202,500 13 March 2026
8, BROWNS ROAD PE21 9BZ Terraced £100,000 13 March 2026
19, ABBEY ROAD PE20 3EN Detached £252,500 13 March 2026
44, DELDALE ROAD PE21 7BT Detached £250,000 12 March 2026
FAQ

Semi-commercial mortgages in Boston: common questions

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

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 Boston residential market, currently thinner but functional, informs the value a lender will place on the residential element of a mixed-use asset.

Which lenders offer semi-commercial mortgages in Boston?

We hold more than one hundred lender relationships across high street banks, challenger banks and specialist lenders. The right lender for a Boston 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 Lincolnshire.

How does the Boston 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 £186,000 residential median in Boston over the past year across roughly 669 sales, with flats around £85,000. 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 Boston?

Yes. We arrange semi-commercial and mixed-use mortgages across the whole of Lincolnshire 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 Boston?

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