The duo tackle future-proofing, as two families at very different stages of their lives tackle tricky renovations in a last-ditch attempt to make their homes work for the long term.
The pair focus the best ways to make a budget stretch, as two families with grand renovation plans look to make their money go a long way.
Kirstie and Phil look back on their best layout transformations and extensions, from a boxy cottage on the rural outskirts of Leeds to a 1930s three-bed semi in Birmingham
Kirstie and Phil look back on their best transformations of single-storey living, from an unusual bungalow in Croydon to a dated, 70s-style bungalow in Larne
Kirstie and Phil look back on their favourite working from home transformations, from a cluttered terrace in Northampton to a three-bed semi in Waterbeach
Kirstie and Phil look back on their best land-grabbing renovations to balance home and garden, from a detached in Bury St Edmunds to a three-bed in Harrogate
Kirstie and Phil look back on their best small-space transformations, from knocking down walls in Windsor to a ground-floor revamp in Northamptonshire
Kirstie and Phil look back on their best builds that put family front and centre, from a town house with emotional ties in Cullercoats to a charming five-bed in Rushden.
Kirstie and Phil look back on two clever loft conversions, from a struggle for space in Walthamstow to the lofty ambition of a luxurious bedroom in Preston.
Kirstie and Phil look back on two homes in need of smart storage solutions and savvy spending, from shilly-shallying in Stoke to disorganised chaos in Newcastle
Kirstie and Phil look back on two of their best renovations that didn't compromise on character, from a Brixworth two-bed bursting at the seams to a charming 17th-century Cranleigh cottage
Kirstie and Phil look back on some of their biggest builds and complete overhauls, from a higgledy-piggledy layout in a stunning spot in Huddersfield, to wall-to-wall woes in Woodford in London.
In this special episode as part of Channel 4's Black to Front project, sister-and-brother property developer team Scarlette and Stuart Douglas help Shammie and Norbert decide the future of their four-bed semi in Ipswich