Ranvir Singh shows us how to achieve the green dream without breaking the bank. She follows families as they turn their homes into beautiful eco houses.

Ranvir Singh and Kunle Barker travel to Tamworth to meet Keira and Ewan in their newly purchased 1960s home. With a tiny budget they have allocated £3,000 to renovate their bathroom, yet they want a luxury hotel look. Their green makeover involves replacing a water-guzzling toilet and bath with money- and energy-saving fittings as well as creating a chic and contemporary finish. For inspiration, Ranvir heads to a house with a wood-fired hot tub.

Ranvir Singh and Kunle Barker meet eco-enthusiasts Rachel and Jake in Cambridgeshire. They are 10 months into transforming their 1960s three-bedroom house into an energy-efficient sustainable eco-home. With the majority of the green build done, Kunle offers up his design experience to tackle their open-plan kitchen and living room, which they've ambitiously moved up to the first floor to maximise spectacular views and to harness the solar power of the sun. For eco inspiration, Ranvir heads to Greenend House, an underground house in Buckinghamshire.