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Who We Are

Sienns Developments is an established, family run company with a first-class reputation, consistently delivering high-quality projects.

We are specialists in loft conversions, with awards to prove it! But we apply our rigorous attention to detail and high-quality craftsmanship across all of our services, to ensure we create the very best experience, and space, for you from start to finish. #ItsWhatWeDo

Loft Conversions

Building up is a great way to gain some extra space, for a bedroom or a home office, whatever it is we can help!

Award Winning

We don’t mean to brag but we’ve won awards for our loft conversions. We believe we’re the best in the business to help you realise your loft dreams!

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Whether it's your current family home or a new purchase, sometimes a complete overhaul is the best way forward.

A new start

Got yourself a bit of a ‘doer-upper’? We can help breathe new life into those bricks and mortar. Get in touch to find out how.

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Kitchen too small? Need more room? Building out is a great way to get that extra space for all the family to enjoy.

Making more room

As well as lofts, we’re masters of the extension. Drop us a line or give us a call to find out how we can help bring more space into your life.

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Our clients say it best…

“We can’t recommend enough Lee Delaney and his team at Sienns Developments. They’re brilliant. They recently dismantled our old loft conversion and twisting staircase and completely rebuilt it, including an en-suite shower room, all within 5 weeks. And their price compares well to other building firms.”


“Working with Lee and his team has been a joy. Right from the very beginning we were able to quiz him on logistics and planning; Lee was able to recommend us a trusted team of architects, plumbers, plasterers, electricians, skips and scaffolders. He provided detailed quotes and stuck to his word always, extremely reliable.”


“Our experience working with Lee and his team was brilliant from start to finish. He was really helpful in the early stages of planning and suggested many ideas that have ended up making the space work even better than we had imagined. All the costings were presented in a clear and straightforward way and the initial timeframe was kept to and in the end even beaten! “


Project Gallery

Need some inspiration? Take a look at some of our most recently completed projects.


Our Core Values

Our business is underpinned by many years of taking good care of our clients and building strong relationships based on trust and honesty. We believe in customer care with customer service always top of our agenda

Working together

We use registered associations, working in conjunction with the below contractors

Creating award winning spaces

We’d love to help you make the most of your home. Get in touch to have a chat about your plans or to arrange a free, no obligation quote. We look forward to creating something amazing together!