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An ultra-modern CURVED house that costs only £1 a day to run is for sale for £1.85million

An ultra-modern curved house with strong eco-credentials and a unique design is for sale for £1.85million.

The property in Worth, near Crawley in West Sussex, has a curved shape and took a father and son construction team three years to build.

It is called The Spiral and comes with geo-thermal and solar energy, as well as a state of the art heat and energy recovery system that means the property can produce running costs of only £1 a day.

The uniquely-designed property in Worth, near Crawley in West Sussex, has an impressive curved shape and is called The Spiral

The impressive family home is on the market for £1.85million and the sale is being handled by estate agents Mishon Mackay

The impressive family home is on the market for £1.85million and the sale is being handled by estate agents Mishon Mackay

The five-bedroom luxury property was built by father and son team Roland and Sean Rigg. Sean is currently living at the property after the build was finished in early 2020. It began in September 2017.

He lives at the Spiral with his wife, who is from California – which is somewhere they hope to spend more time at in the future and so they have decided to sell the West Sussex property.

The Rigg family declined to give exact figures with regards to the cost of the build, but confirmed that the ‘sophisticated construction methods’ meant that they were ‘three times the cost of a conventional build’.

The methods included the use of micro cement, which has a high percentage of aggregate, fine filler and a unique low carbon dioxide cement binder and high solid polymer to reduce water usage.

The property costs around £1 per day to run, as it was built to Passivhaus criteria – which means warm in the winter and cool in the summer and uses green energy heating systems and air recycling.

The sweeping curve of the property can be admired from the garden which includes a lawn area and an outdoor dining table

The sweeping curve of the property can be admired from the garden which includes a lawn area and an outdoor dining table

Father and son construction team: Roland and Sean Rigg worked together on the building of the West Sussex house

Father and son construction team: Roland and Sean Rigg worked together on the building of the West Sussex house

Having previously working on more conventional projects, Sean said he was excited about the eco-friendly aspect of the build

Having previously working on more conventional projects, Sean said he was excited about the eco-friendly aspect of the build

The contemporary kitchen combines dark grey with bright pops of a contrasting mustard colour in the units and wall tiles

The contemporary kitchen combines dark grey with bright pops of a contrasting mustard colour in the units and wall tiles

Natural flow: The kitchen and dining area have large bespoke sliding doors that open onto the terrace in the garden

Natural flow: The kitchen and dining area have large bespoke sliding doors that open onto the terrace in the garden

Plenty of outdoor space to entertain: The garden terrace has a large sunken fire pit, as well as hot tub and a water feature

Plenty of outdoor space to entertain: The garden terrace has a large sunken fire pit, as well as hot tub and a water feature

The under-floor heating is driven by a ground source heat pump that involves pumping fluid down 150 metres into the ground and back up to the pump. 

The house also has 19 solar panels that act as a boost to the heating and hot water system. And there is an air recycling system which takes moist air from all the bathrooms and kitchen and returns filtered fresh air to all rooms.

Other modern features in the property include three metre height doors and ceilings, resin floors and micro cement walls in the ensuite showers, resin floors in the kitchen and lounge, and a 1200mm wide main door with a fingerprint entry system.

Sean said the running costs of just over £1 a day is ‘when the panels are working well and cover all the hot water, lighting, and appliances’.

Seeking more space and privacy? The house is set behind secure entrance gates and is in just over half an acre of land

Seeking more space and privacy? The house is set behind secure entrance gates and is in just over half an acre of land

The cost of the project was not disclosed but is said to have been three times the cost of a conventional build

The cost of the project was not disclosed but is said to have been three times the cost of a conventional build

Plenty of curves: Even the front door porch has adopted a spiral theme and is cleverly connected to the main house

Plenty of curves: Even the front door porch has adopted a spiral theme and is cleverly connected to the main house

There are five spacious bedrooms - each with an en suite - and they also include some interesting designs and modern lighting

There are five spacious bedrooms – each with an en suite – and they also include some interesting designs and modern lighting

Sean decided to bring his dad to help with the build due to his vast experience in the construction industry

Sean decided to bring his dad to help with the build due to his vast experience in the construction industry

Sean said: ‘Having never encountered Passivhaus construction before, I felt this added a new dimension to my building knowledge. 

‘The eco-friendly aspect was appealing and relevant to the time. Having previously completed a number of conventional projects, I realised that this was a bit more complicated. I decided to bring on my dad to help with his vast experience in the construction industry. 

‘After a lot of research, it was decided – albeit a huge challenge – the end product would be well worth achieving.’

The property is entered through the circular front door that leads to the open plan living area that gently curves with views across the garden. The kitchen also has bespoke sliding doors opening onto the terrace.

There are four bedrooms, all with ensuite, while the study could be used as a fifth bedroom.

The house is set behind secure gates and sets in just over half an acre of land.

The garage is cleverly inset into the grounds and has a grassed roof, while the terrace has a sunken fire pit, hot tub and water feature.

The property is on the western edge of Turners Hill within easy reach of local schools, a village shop, public houses and good transport links

The property is on the western edge of Turners Hill within easy reach of local schools, a village shop, public houses and good transport links

Hidden away out of site: The large garage at The Spiral is inset into the grounds of the house and has a grassed roof

Hidden away out of site: The large garage at The Spiral is inset into the grounds of the house and has a grassed roof

The property is on the western edge of Turners Hill within easy reach of local schools, a village shop, public houses and good transport links.

Alex Mackay, of estate agents Mishon Mackay, which is handling the sale, said: ‘The Spiral is an incredibly unique property, and boasts impressive and stylish architectural design.

‘Inside, the property features a major living space, along with multiple large bedrooms with en suites. It would make the perfect property for an eco-conscious couple or family.’

Read more at DailyMail.co.uk