User experience agency Sigma expects to hit £4 million in revenue and plans to invest £250,000 to renovate its Macclesfield head office.

Founded by managing director Hilary Stephenson in 2007, the agency works with clients to develop and test prototypes and early-stage web interfaces or software applications.

In its first decade in business it has grown to a team of 45 and opened a second office in Cambridge.

Its clients include AstraZeneca, Sport England, BBC, Mind, Essar Oil, Zuto, Stockport Council and the University of Manchester.

"On the back of new client wins, a bigger team, we are rapidly growing our portfolio," she said.

"We engage with our clients through inclusive usability. This means we carry out a lot of research, co-design, prototyping and usability testing with the intended audience of our clients.

"We want to continue our steady growth and this includes new partnerships and closer collaboration with our wider group to take on larger project challenges."

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The company now plans to upgrade its user research labs and workshop facilities through interior design experts the Sheila Bird Group.

"We're thrilled to re-affirm our commitment to Macclesfield, a town that many of us also call home," added Stephenson.

"With this project, our aim is to create a revitalised office space that supports our growth plans for the coming years, while retaining the unique industrial character of the old cotton mill we’ve worked out of for so long."

Atul Bansal, co-founder of the Sheila Bird Group, said: "Sigma was looking for an honest space which would allow staff to work exactly how they wanted in an environment that fit its needs, without any unnecessary trend-led gimmicks – a brief which suits us perfectly."