6-bedroom house · NN14 3JN
For saleListed 3 days
Opportunity summary
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About
Islip Mill House – An Exceptional Riverside Residence A truly exceptional Grade II listed former mill house, occupying an elevated position within approximately 1.1 acres of beautiful private grounds on the banks of the River Nene.
Offering approximately 4,150 sq ft of characterful accommodation, including six bedrooms and four reception rooms, this remarkable historic home combines period charm, privacy and versatile living with an extraordinary riverside lifestyle.
With approximately 200 feet of river frontage, private fishing and mooring rights, a boathouse and slipway, Mill House provides a rare opportunity to enjoy life beside the water.
A haven for wildlife, the grounds attract kingfishers, swans, otters and deer, creating an idyllic setting where nature can be enjoyed throughout the seasons.
Steeped in history and renowned for its secluded setting, Mill House has welcomed A-list celebrities and distinguished guests, drawn by its character, tranquillity and exclusivity.
The flexible accommodation also offers potential for guest accommodation or holiday-let income, while the extensive grounds may offer scope for a garage, enlarged boathouse or elegant orangery, subject to the necessary planning and listed-building consents.
More than simply a country house, Islip Mill House offers a rare opportunity to own a remarkable piece of riverside heritage, where history, nature and an exceptional lifestyle come together.
Oil Central Heating and Aga Mains Water Septic Tank System Grade II Listed
Value & comps
No previous sales on record.
Returns
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Archie refurb estimate: a Pro feature
0.0% below asking
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Deal
Properties like this can earn 2–3x BTL yields when converted to HMO, with retrofit costs around £10k/room. Sign in to see the full tier, yield projection, and cost breakdown.
Commercial properties like this can earn 30-50% higher yields when converted to residential under Class MA / Q / P / PA, with prior approval costing ~GBP 96/unit. Sign in to see the recommended route, yield uplift, and cost breakdown.
BRRR-suited properties can recycle 80-100% of investor capital on refi, leaving a high-yielding rental with most of the money out. Sign in to see the refurb cost stack, ARV projection, and refinance maths.
Detached + large garden = sub-division play. Pro tier unlocks the tier badge, plot size, uplift estimate, and regional land benchmark.
Short-lease flats trade at deep discount, but extending under the 1993 Act often costs far less than the discount. Pro tier unlocks the tier badge, premium breakdown, long-lease ARV and arbitrage maths.
See projected short-stay revenue vs a vanilla BTL for this property.
See real sub-let margins (HMO room rates & SA nightly rates) vs the landlord rent.
Area
Agent & docs
FAQ
About Mill Lane, Islip, Northamptonshire, NN14
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