From the surrounding countryside, you would never know that this vast ultra-modern house with six bedrooms was in the centre of a rural idyll.
That is because the property which spans across 12,000 square foot – the equivalent size of more than four tennis courts – is below ground level.
It was built in the former Hawksworth Moor Reservoir on the edge of Ilkley Moor, and includes a main family home, a guest house and five garages.
There is also a home office and a gym, with a virtual golf simulator. It is all nestled within the former walls of the reservoir.
The hidden house: The property sits in 12 acres on the edge of Ilkley Moor in West Yorkshire
The house looks like it is buried, having been built in the former Hawksworth Moor Reservoir
The house is accessed via a sliding electric gate in the retained side wall of the reservoir, leading to a parking area with five garages.
The vast interior space means there is room for an eight seater island in the kitchen, which also includes several ovens, two integrated dishwashers and a Quooker boiling tap.
Above the kitchen is a mezzanine level with a games rooms and a glass galleried balcony with far reaching view of the surrounding countryside.
On the lower ground floor is a cinema room and a generous master bedroom that has an en-suite bathroom with twin waterfall showers, separate bath and a walk-in wardrobe.
There are a further three double bedrooms all with en-suites and access to the central courtyard.
On the moors: Reservoir House is on the south east side of Ilkley
The property is on the market via estate agents Knight Frank with a £3million price tag
The interior is light and bright in spite of looking as though it has been built underground
The property has a full Control4 LED based lighting and audio system, as well as a NIBE ground source heat pump, hot water system, heat recovery system and underfloor heating.
Across the courtyard is a self-contained annexe behind which is a separate double storey building with quadruple garaging, plant room, storage on the ground floor and a gym with a golf simulator.
Outside and within the reservoir walls is a landscaped central courtyard with planted raised beds, decking and seating. It all sits in 12 acres of land.
Playtime at home: There is a gym and a virtual golf simulator
The vast interior space includes an eight seater island in the kitchen
Floor to ceiling windows helps to flood the interiors with plenty of light
Above the kitchen is a mezzanine level with a a glass galleried balcony
The house is accessed via a sliding electric gate in the retained side wall of the reservoir
Reservoir House is on the south east side of Ilkley, where there shops, restaurants, a boutique cinema and several schools – including Ilkley Grammar School and three private schools.
There is also a regular train service that runs from the town to both Leeds and Bradford.
The property is currently on the market via estate agents Knight Frank, with an asking price of £3million.
The house spans across 12,000 sq ft, the equivalent size of more than four tennis courts
There is Control4 LED based lighting and audio system, and underfloor heating
The games room provides an entertainment area with a view of the surrounding countryside
There is a cinema room with a large screen, speakers and seating
The ultra-modern home has eight bathrooms, including this one with grey tiles
There are six bedrooms , including this one that includes its own separate seating area
The average price of a home in Ilkley is £437,073, which is higher than the £315,150 typical value of a home in Britain today, according to property website Zoopla.
The ambitious Grand Designs style home was built on the site after the reservoir was put out of action by Yorkshire Water in the 1990s.