Money might have been tight at times during Stefan and Ania Lepkowski’s six-year Grand Designs build which featured back in 2011, but passion was always plentiful.

 grand designs tv house mill northumberland

Image: A wooden bridge over the pond leads to the entrance. Photo: Jefferson Smith 

The biggest challenge that Stefan and Ania Lepkowski set themselves with this expansive renovation project was not just that they built the bulk of their home with their own hands, but also the range of skills and materials this involved. The project included restoring a derelict cottage, building a new one from reclaimed stone, plus a modern glass and steel building to link them, and a basement. 

The plot, an abandoned Georgian building with weeds and trees growing through the walls, surrounded by countryside, but just half an hour’s drive from Newcastle. When Stefan first saw the property 20 years ago it was love at first sight, though it didn’t come on the market left for another 15 years – which, as luck would have it, was when he and Ania were house hunting and had the funds to buy it.

grand designs tv house mill northumberland

Image: The original Georgian cottage (on the left) is connected to the new stone building by a zinc-clad linking structure. Much of the stone for the new-build was reclaimed on-site from an old barn and water mill. Photo: Jefferson Smith 

‘We sank every penny we had into this ruin. I thought, “Would I get the opportunity to do a project like this again? Just get it, even if it takes you 10 or 15 years to develop it.”’

Thankfully it took fewer, though six years is still something of a long haul. During this time they had to juggle finances, jobs and the arrival of their kids. 

Watch the episode: Newcastle, 2011

A light-filled home  

grand designs tv house mill northumberland

Image: Linking old and new, the zinc-clad structure contains the dining room and opens on to a paved terrace, via sliding, folding doors. Photo: Jefferson Smith 

The sense of light and space from the open-plan ground floor is triumphant, with a glazed gable in the kitchen and banks of glazed doors lining the living room and dining room. The double-height atrium in the kitchen also brings light into the first floor (home to four bedrooms and three bathrooms).

The abundance of light from the south- and west-facing glazed doors in the living space and dining space helps warm the house naturally, as does a ground source heat pump, which powers underfloor heating on both storeys. Stefan was also keen that the floors be made from concrete, which minimises noise between the floors, but also retains heat better than timber, so the house stays warmer for longer.

Read more: Polished concrete floors: a buyer's guide

A hands-on-build

grand designs tv house mill northumberland 6

Image: For the bespoke kitchen, Ania chose materials that would tie in with the rest of the house – wooden cabinets to match the wood floors and a polished granite worksurface to blend with the exposed steel frame. Photo: Jefferson Smith 

But what makes the home such a joy is the hands-on approach Stefan and Ania took towards the design and build. They both got stuck in – Ania in her overalls stripping back the Georgian cottage, and Stefan fitting together heavy beams of timber – and it shows. It feels like a hand-crafted house, and one that is perfectly oriented in its location. They spent a year on site before building started to observe the light and wind and mark layouts in the snow. They even mocked up their kitchen in MDF before having the real thing built, to gauge its size.

This approach also fostered fearlessness, says Stefan. ‘When you’re doing DIY, you might worry about the damage you could cause drilling a hole in the wall. But building something like this, you don’t worry, because you learn how to rebuild the wall if you have to. It shifts your perception significantly.’

read a free issue of grand designs magazine

Building a team

grand designs tv house mill northumberland

Image: Exposed steel beams in the dining room continue the industrial character of the linking building. The steel frame was necessary to support the wide spans of the openplan space and the concrete floors of the upper level. Photo: Jefferson Smith 

The other secret of their success was their team of experts, starting with architect Kevin Brown, who pointed Stefan and Ania towards structural engineer Peter Stienlet, who in turn suggested they hire expert stonemason Paul Foster. It’s a great example of how finding one good person can lead you to others.

‘Without those guys, we could never have done it. When Kevin Brown came in, he was immediately firing ideas. He was adding value,’ says Stefan. ‘The same goes for Peter Stienlet. I met him for a pint and he was fired up with passion. Passionate people buy into your vision; they go the extra mile.’

Read more: How to hire the right project team for your self build

The perfect mix 

But what of one of the more contentious ideas – the zinc-clad link between the two stone buildings – which Kevin McCloud compared unfavourably to a tank. Do they think that’s a fair interpretation?

‘It’s meant to look exactly as it does now,’ says Kevin Brown, who designed the link. ‘It’s meant to look chunky, and totally different from the other parts of the house, because it’s an industrial expression. This site used to be a working mill, an industrial site – it wasn’t just a farm.’

Stefan agrees: ‘If we’d done it in a more timid way, it would have looked like we didn’t have the courage of our convictions. I absolutely feel that it works really well, and trees and landscaping will soften its setting over time. At the end of the day, it’s our house and we love it.’

Project reflections

grand designs tv house mill northumberland

Image: Ania and daughter Helenka on the walkway connecting the rear of the zinc structure with the bank behind. Photo: Jefferson Smith 

So is there anything they would do differently? ‘Managing the budget,’ says Stefan, who started off with a woefully optimistic target of £250,000, but quickly went over that, before having to borrow more from his company and the bank.

‘It feels like an enormous amount at the beginning, and you’re doing big things like pouring concrete, so it feels like the money will last a long time, but then it’s sinks and WCs and taps – £50 here, £100 there – and when you add up your spreadsheet you’ve suddenly spent a small fortune.’

He’s reluctant to say how much the final bill was, but he does say it will be a few years before they’re comfortable with the amount. But then again, this house was never about money. It was about passion. ‘Worrying about what you spent is not a healthy way to look at things. It’s not about money. It’s about having your dream home, and people will give their right arm for that,’ he says.

And would they do it again? ‘Absolutely, if you were to roll back the clock as though we’d never done this one. It’s been hugely stressful at times, but you just have to make sure you have lots of energy and don’t give up, because the rewards are there. If you’re prepared to sacrifice, you can get something pretty amazing. We could never have afforded to buy what we’ve built.’


From Grand Designs TV Houses to the best advice for turning your self-build project into a home, read Grand Designs magazine digitally for free now by registering your details 

read a free issue of grand designs magazine



9 of the best home conversions featured on Grand Designs

Barn conversions: 9 of the best contemporary rural homes

More Grand Designs TV Houses...

Kevins Column

Grand Designs Live: Ask an Expert Weekend 22-23 May 2021

Discover free home project advice and product recommendations from the comfort of your own home. Register now to express your interest.
Grand Designs TV Houses

TV House: Grade II listed barn conversion in Essex

After buying a Grade II listed timber-framed barn in Essex, Ben and Freddie, who appeared on Grand Designs in 2011, converted the 500-year-old building into...
Grand Designs TV Houses

Grand Designs 2021: TV houses before and after

At the end of this series of Grand Designs, take a look back over each project from it's starting point to the finished home. 
Grand Designs TV Houses

Grand Designs TV House 2021: Converted flour mill in Cornwall

In the final episode of this series of Grand Designs, Kevin meets dynamic duo Leigh and Richard, who moved from Derbyshire to Cornwall to undertake...
Grand Designs TV Houses

Grand Designs TV House 2021: Self heating earth house in Buckinghamshire

In the fourth episode of Grand Designs new series, Kevin meets Andrew and Margretta who hope to build an innovative self heating house embedded in...
Grand Designs TV Houses

Grand Designs TV House 2021: Dutch barn self build in South Lincolnshire

Featured in episode 3 of the 2021 series, Nathan and Amye's Dutch barn inspired home is an ambitious project that tested their self build skills....
Grand Designs TV Houses

Grand Designs TV House 2021: Barn conversion in Sevenoaks, Kent

In episode 2 of the new series of Grand Designs, Georgie and Greg are converting a barn on their family farm in Kent. But is...