Commercial Mortgages Cosham and Lakeside North Harbour
Cosham is the PO6 mainland gateway, the first commercial district north of Portsea Island once a driver clears the M275 viaduct and the A27. The fabric is the largest office park on the South Coast, Lakeside North Harbour on Western Road, the IBM-legacy 1.5 million sq ft Grade B office cluster now multi-tenant after IBM's footprint contraction, anchored alongside Queen Alexandra Hospital, the dominant Portsmouth Hospitals University NHS Trust acute site, and the Cosham High Street district retail centre. We arrange commercial mortgages for Lakeside North Harbour Grade B office investment and owner-occupier floors, Queen Alexandra Hospital ancillary healthcare and dental and clinic freeholds, Cosham High Street retail parade investment and owner-occupier independents, and the wider PO6 trading-business and care-home corridor stock. Indicative terms inside 48 hours.
15 active commercial property listings currently tracked in Cosham and Lakeside North Harbour.
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The Cosham and Lakeside North Harbour commercial property market
Cosham is the PO6 mainland gateway into Portsmouth, the first commercial district north of the M275 viaduct off Portsea Island. The commercial fabric is unusually concentrated for an outer Portsmouth ward and runs across three distinct sub-markets. Lakeside North Harbour on Western Road carries the largest single office park on the South Coast at around 1.5 million sq ft of Grade B office space, the legacy IBM campus that, since IBM's footprint contraction, has gradually re-leased as multi-tenant Grade B office stock with active reconfiguration and refurbishment programmes running through 2025 and 2026. Queen Alexandra Hospital on Southwick Hill Road anchors the Portsmouth Hospitals University NHS Trust acute footprint and pulls a substantial ancillary cluster of dental practices, private clinics, GP surgeries and care homes through the surrounding PO6 wards. Cosham High Street and the district retail centre carry a deep independent and small-multiple retail and F&B parade alongside the standard suburban professional-services and convenience fabric.
Most Cosham and Lakeside commercial mortgage deals run in the £500K to £5M facility bracket, with the largest at Lakeside North Harbour reaching £8M+ on whole-floor or whole-building Grade B office investment freeholds. Lakeside Grade B office investment currently prices at 7.0 to 8.5% pa at 60 to 70% LTV through Allica Bank, HTB, Shawbrook and Cambridge & Counties on let stock, with stronger-covenant single-tenant floors at the tighter end. Owner-occupier professional firms buying their own Lakeside or Cosham office floor price 6.5 to 8.0% pa at 70 to 75% LTV through Allica Bank, HTB and YBS Commercial. Queen Alexandra Hospital ancillary healthcare freeholds, dental and private clinic, price 6.5 to 8.0% pa at 70 to 80% LTV through Hampshire Trust Bank and Allica Bank's health desk on NHS contract value plus EBITDA. Cosham High Street retail and F&B sits at 7.0 to 8.5% pa at 65 to 75% LTV.
HM Land Registry residential transactions across PO6 confirm a stable family-housing demographic with a strong NHS, MoD and professional-services resident base. The PO6 semi-detached and detached stock supports the affluent professional catchment that drives Lakeside professional-services demand and Queen Alexandra ancillary healthcare consumer demand. They are not direct commercial signals, but they underwrite the tenant covenant assumptions on Cosham High Street retail and the Lakeside owner-occupier office buyer profile. Refinancing of maturing 5-year fixes from 2020 and 2021 is the dominant 2026 product flow across the corridor, with Lakeside Grade B office investment particularly active as 2020 acquisitions reach end-of-fix into a more cautious office investment market.
Recent commercial planning activity in Cosham and Lakeside (PO6)
Three live Portsmouth City Council public access portal files anchor the current Cosham and Lakeside commercial mortgage pipeline. The Lakeside North Harbour office park reconfiguration (Ref 26/00098/FUL) covers refurbishment of IBM-legacy Grade B office floors for multi-tenant occupation at Lakeside North Harbour, Western Road PO6 3EN, the canonical Lakeside refurbishment scheme that supports new owner-occupier and let-investment underwriting as floors come back to market. The Cosham High Street retail parade refurbishment (Ref 25/02012/FUL) covers frontage works and new F&B accommodation in the Cosham district centre at Cosham High Street PO6 3AB, the live district-centre asset management activity that funds either as owner-occupier independent retail at 6.5 to 8.0% pa at 70 to 75% LTV or as parade investment at 7.0 to 8.5% pa at 65 to 75% LTV. The Queen Alexandra Hospital ancillary healthcare scheme (Ref 25/01875/FUL) covers a new dental practice and private clinic accommodation in the Cosham healthcare cluster at Queen Alexandra Hospital, Southwick Hill Road PO6 3LY, the live ancillary healthcare freehold pipeline that we place through Hampshire Trust Bank and Allica Bank health desk on NHS contract value plus EBITDA. Stamp duty applies at the commercial rates on each freehold purchase, refinancing is unaffected.
Active commercial property types in Cosham and Lakeside
Lakeside Grade B office investment
Multi-tenant Grade B office investment freehold and ground lease at Lakeside North Harbour on Western Road, post-IBM reconfiguration stock.
£1M to £8M facility
Lakeside owner-occupier office floor
Professional firms and SME headquarters buying their own Lakeside Grade B office floor of 3,000 to 10,000 sq ft.
£600K to £3M
Queen Alexandra ancillary healthcare
Dental practices, private clinics, GP and pharmacy freeholds inside the Queen Alexandra Hospital ancillary cluster.
£500K to £2M
Cosham High Street retail parade
Cosham district centre retail and F&B parade investment and owner-occupier freehold.
£300K to £1.2M
PO6 care home
Care home freehold inside the PO6 ward catchment serving the affluent NHS and MoD retiree base.
£1M to £4M
Refinance on Lakeside asset management capex
Lakeside North Harbour landlord refinance on completed refurbishment and re-letting.
£1.5M to £6M
Commercial mortgage products active in Cosham and Lakeside
Lakeside Grade B office investment routes via commercial investment mortgage on ICR. Owner-occupier professional firms buying their Lakeside floor via owner-occupier mortgage on EBITDA cover. Queen Alexandra ancillary healthcare via trading-business mortgage on NHS contract value plus EBITDA. Cosham High Street semi-commercial via semi-commercial mortgage. Vacant or repositioning Lakeside floors route through bridge-to-let. Refinancing maturing facilities through commercial remortgage is the highest-volume single product in 2026.
Owner-occupier
Businesses buying their trading premises, EBITDA cover at 1.3–1.5x, LTV to 75% on bricks.
Commercial investment
Let assets, ICR at 140–160% stressed, LTV typically 65–75%.
Semi-commercial
Shop+flat archetypes, blended ICR ~145%, LTVs to 75% via specialists.
Bridge-to-let
Vacant or value-add acquisitions with refurb / re-let exit onto term mortgage.
Refinancing
Maturing facilities, equity release on stabilised commercial assets, rate-driven switches.
Lender appetite for Lakeside North Harbour, Queen Alexandra and Cosham High Street
Deep across the Cosham corridor. Allica Bank runs an engaged South Coast book and routinely tops the shortlist on Lakeside owner-occupier office floors, Cosham High Street retail and Queen Alexandra ancillary healthcare freeholds at 6.5 to 8.0% pa at 70 to 75% LTV, with Allica's health desk taking dental and private clinic with NHS contract value plus EBITDA. HTB covers larger Lakeside Grade B office investment and the upper end of Cosham retail parade investment at 65 to 75% LTV. Shawbrook takes Lakeside Grade B office investment particularly where capex programmes feed into the underwrite and value-add bridge-to-let on Lakeside repositioning floors. Cambridge & Counties selectively covers Lakeside Grade B let investment at 65 to 70% LTV on stronger-covenant tenant mixes. YBS Commercial covers owner-occupier office at the tighter end of pricing for strong-covenant SME borrowers. Paragon takes portfolio investment combining Lakeside and Cosham retail exposure. Together covers value-end Cosham High Street semi-commercial and selected ancillary healthcare freeholds. Hampshire Trust Bank is locally headquartered in Hampshire and runs one of the most active Portsmouth books, particularly on Queen Alexandra ancillary healthcare and Lakeside owner-occupier office floors. Allica, HTB, Paragon, Together, YBS Commercial and Cambridge & Counties all take selected Cosham and Lakeside deals in the £500K to £5M bracket. Refinancing on a stabilised Lakeside Grade B office investment typically prices 7.0 to 8.5% pa at 60 to 70% LTV. Commercial mortgages are unregulated lending and fall outside the FCA regulated mortgage perimeter, we do not hold FCA authorisation because the products we arrange are unregulated.
Property types we finance in Cosham and Lakeside North Harbour
Asset classes most active in Cosham and Lakeside North Harbour, each linked to the dedicated finance structure, lender appetite and typical terms for that property type.
Cosham and Lakeside North Harbour sold-price data
Live HM Land Registry transaction data for the Cosham and Lakeside North Harbour local authority area. Use this as market evidence when appraising your scheme or testing GDV assumptions.
Median price
£255K
+2% YoY
Transactions (12m)
1,870
Completed sales
New-build share
0.0%
0 new-build sales
New-build premium
n/a
vs existing stock
Median price by property type
Detached
£538K
Semi-detached
£335K
Terraced
£260K
Flat / Apartment
£165K
Recent transactions
| Date | Postcode | Address | Type | Price |
|---|---|---|---|---|
| 25 Feb 2026 | PO2 7HW | 2, DRAYTON ROAD | Other | £322K |
| 25 Feb 2026 | PO4 9JW | 44, FORDINGBRIDGE ROAD | Terraced | £367K |
| 20 Feb 2026 | PO6 1NB | 20, COPSEY GROVE | Terraced | £218K |
| 20 Feb 2026 | PO4 8AG | 100, FRENSHAM ROAD | Terraced | £379K |
| 20 Feb 2026 | PO4 9DZ | FLAT 1, MAUREEN FOYE COURT, HASLEMERE RO… | Flat / Apartment | £190K |
| 20 Feb 2026 | PO4 9HQ | 91, METHUEN ROAD | Terraced | £263K |
| 20 Feb 2026 | PO5 1NR | 86, OXFORD ROAD | Terraced | £231K |
| 20 Feb 2026 | PO2 8BE | 62, PITCROFT ROAD | Terraced | £230K |
Source: HM Land Registry Price Paid Data, Portsmouth LPA. Updated 27 Apr 2026.
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