The donation comes as part of a company-wide, year-long fundraising appeal in celebration of the firm’s 125th business anniversary.
The significant sum was raised over 12 months by the firm’s Swindon staff through numerous fundraising events.
DASH is an independent local charity with a mission to improve the quality of life of adults of working age with high-functioning autism and Asperger’s living in Swindon.
It aims to help people with autism enjoy safer, healthier, more sociable, more productive and happier lives.
Beard’s Swindon director Marc Bayley said: “I’m extremely proud of all our Swindon staff who have worked really hard to raise this money. DASH is such an important charity which has helped so many people living with Asperger’s in our local area.
"I hope that our donation will help the DASH team continue their valuable work which is making a difference to people’s lives in our community.”
Money raised by Beard’s Swindon staff was match-funded by The Beard Charitable Foundation. Set up in 2016 by the Beard family, The Beard Charitable Foundation provides funding support to Beard employees in their charitable and community pursuits across the South of England.
It also makes grants of around £20,000 annually, as well as strategic donations to local charities for projects which promote construction industry careers.
DASH manager Adrian Embling said: “DASH is enormously grateful for the time and effort so selflessly donated by everyone at Beard.
"It was heartening to hear that everyone had such a good time at the fundraising events. It is an astonishing achievement and means we can reassure our service users that their social groups can continue for another year.
"This affects the lives of many adults on the Autistic spectrum. DASH social groups are often the only social outlet for many of the people who attend."